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Method Statement: Construction of monolithic reinforced concrete walls and slabs using large-panel aluminum formwork

This method statement regulates the processes of constructing monolithic reinforced concrete walls and slabs using reusable modular large-panel formwork. The document contains requirements for construction management, technology of reinforcement, formwork, and concreting operations, as well as quality control criteria in accordance with international standards (including ISO and EN principles).
7 sections 23 figures

Materials

  • Ready-mixed concrete (international class C20/25 - C25/30, workability S3-S4 / slump 100-220 mm)
  • Spatial and planar reinforcement cages (bars with a diameter of 12-14 mm)
  • Reinforcing meshes (planar, types C-14, C-15, C-16)
  • Modular aluminum formwork panels (deck - 18 mm laminated plywood)
  • Plastic concrete cover spacers (for walls and slabs)
  • Emulsion release agent for treating formwork panel decks
  • Tie wire (for assembling reinforcement cages)

Equipment

  • Tower crane (lifting capacity 5 t, maximum jib length 20 m)
  • Mobile concrete pump with placing boom (delivery reach: horizontal 19 m, vertical 22 m)
  • Transit mixer (concrete mixer truck) with a drum geometric volume of at least 6.1 m³
  • Electromechanical internal vibrator (vibrating head length 440 mm, weight approx. 15 kg)
  • Rotary concrete skip (capacity 1.0 m³, with sector gate and side discharge)
  • Welding transformer (supply voltage 220/380 V)
  • Mobile compressor (rated power 32 kW, for compressed air supply)
  • Pneumatic paint pressure tank (capacity 20 L, for applying release agent to formwork)
1

1. Scope and Design Solutions

The method statement is developed for the construction of monolithic reinforced concrete structures (walls and slabs) of typical floors in residential and public buildings. A four-story block with axial dimensions of 33.6 x 13.2 m is taken as a reference equivalent. The building framework is based on monolithic strip foundations. Design thicknesses of the structures: external load-bearing walls — 500 mm, internal walls — 220 mm, intermediate floor slabs — 160 mm. An international concrete class of C20/25 – C25/30 is used for concreting.

The main technological equipment is modular large-panel formwork made of lightweight aluminum alloys. The panel framework is made of an extruded aluminum profile, and the deck is made of 18 mm thick laminated plywood. The unification of lock connections allows joining elements with systems from leading global manufacturers. The slab formwork consists of longitudinal (160 mm high) and transverse (140 mm high) distribution beams, 1.2 m wide support frames, telescopic props with screw jacks, and forkheads.

Works are carried out during the summer period at positive temperatures in a single-shift mode. When the average daily temperature drops below +5°C, the process is subject to adjustment with the implementation of winter concreting methods (electrical heating, use of antifreeze admixtures, covering with thermal mats) in accordance with applicable regulatory requirements for concrete works (EN 13670 equivalent).

Fig. 1 — Main facade elevation of a four-story residential building detailing architectural articulation, fenestration, and roof structure
Fig. 1 — Main facade elevation of a four-story residential building detailing architectural articulation, fenestration, and roof structure
1Pitched roof structure, typically timber-framed with metal or shingle roofing material, providing weather protection and defining the building's silhouette
2Roof parapet or eaves cornice with a protective metal flashing or railing, ensuring safe drainage and defining the roof edge
3Triangular pediment atop the projecting facade volume (risalit), featuring a decorative semi-circular window or vent (tympanum detail)
4Standard rectangular casement window on the top floor, likely double or triple-glazed uPVC or timber framed, with a pronounced lintel molding
5Standard rectangular casement window on the intermediate floor, identical in style to upper level windows, contributing to the regular fenestration rhythm
6Arched window or glazed door assembly within the projecting volume, featuring metal balustrades (Juliette balcony) for upper-level loggias or enclosed balconies
7Standard rectangular casement window on the lower intermediate floor, aligning vertically with upper windows and featuring matching exterior trim
8Main entrance door set within a large arched opening at the base of the lateral projecting volumes, providing access to the building's stairwells
9Main exterior wall surface, likely finished with smooth plaster or stucco over masonry or concrete block construction, punctuated by regular window openings
10Building base or socle (plinth), visibly separated from the main facade by a horizontal molding, typically finished with durable, moisture-resistant materials like stone or textured render
  1. Analysis of project documentation and verification of building dimensions (33.6 x 13.2 m in axes).
  2. Approval of specifications for aluminum modular panels, fastening elements (push-pull props, locks, tie rods), and plywood deck (18 mm).
  3. Planning the delivery schedule for ready-mixed concrete (recommended class C25/30) and reinforcing steel to the construction site.
2

2. Preparatory Works and Storage

Prior to the start of the main assembly in the working area, a complex of organizational and technical measures must be completed. Geodetic layout of axes is performed with the transfer of wall elevations onto the slab. The base surface is leveled and cleaned of construction debris and laitance. The contour for installing the panels is marked with indelible paint, applying alignment marks that fix the working position of the formwork.

Formwork sets are delivered to the construction site in a state fully ready for operation, without the need for modification. Elements are placed within the operating radius of a tower crane (lifting capacity from 5 t, jib length not less than 20 m). Storage is carried out on leveled areas under a canopy to prevent atmospheric corrosion and damage to the plywood.

Panels are stacked in piles no more than 1.0–1.2 m high with the mandatory use of wooden spacers between tiers. Small components (eccentric locks, nuts, washers, brackets) are stored sorted by size in reusable metal or wooden boxes. The formwork system must be treated with a specialized emulsion release agent before each installation.

Fig. 1 — Architectural front elevation of a four-story multi-family residential building illustrating facade composition, roof detailing, and fenestration
Fig. 2 — Architectural front elevation of a four-story multi-family residential building illustrating facade composition, roof detailing, and fenestration
1Roofing material: Corrugated metal or tiled roofing system on a pitched structure, providing weather protection.
2Roof edge protection: Tubular snow guard system installed along the eaves to prevent large masses of snow from sliding off.
3Eaves/Cornice: Overhanging roof edge detail, facilitating water runoff into the drainage system.
4Rainwater drainage system: Vertical downspout pipe, fixed to the facade, directing water from the roof gutters to the ground level.
5Facade finish: Exterior wall surface, likely finished with stucco or insulated rendering system, providing aesthetic appeal and weather resistance.
6Balcony enclosure: Wrought iron or steel railing system installed across arched window openings for fall protection.
7Upper-level fenestration: Multi-pane casement or tilt-and-turn windows, providing natural light and ventilation to the residential units.
8Mid-level fenestration: Standard rectangular window units aligned vertically to define the structural bays.
9Ground-level fenestration: Window units at the lowest residential floor, consistent in style with upper levels.
10Main entrance door: Glazed entry door system with a transom window above, providing access to the common stairwell.
11Plinth/Base: Exposed foundation wall or plinth finish, typically concrete or masonry, protecting the lower facade from moisture and mechanical damage.
12Secondary entrance: Additional access point, structurally similar to the main entrance, serving a different section of the building.
13Elevation marker: Architectural level reference point indicating the height of the eaves/cornice relative to a base datum.
14Grid lines/Axes: Structural grid reference lines (11 and 1) indicating the extents of the building section shown in this elevation.
  1. Cleaning the surface of the previously concreted slab from debris and laitance.
  2. Geodetic layout of axes with indelible paint alignment marks for the contours of future walls.
  3. Acceptance and sorting of formwork elements: stacking panels on wooden spacers (stack height up to 1.2 m).
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3. Formwork Operations

Installation of the large-panel formwork starts with laying guide (kicker) rails along the contour of the structure. The inner face of the rail is strictly aligned with the outer face of the future monolithic wall. After verifying the rails, linear (dimensions up to 3.0x2.4 m) and corner panels are supplied by the tower crane. The connection of adjacent elements is carried out with eccentric locks on the outer surface of the profile, ensuring a tight joint and structural rigidity.

Erection of wall formwork is performed in two stages: initially, the outer side of the wall is assembled to the full height of the floor. After the installation, tying, and commission acceptance of reinforcement cages, the opposing (inner) part of the formwork is installed along with tie rods and protective PVC tubes. The top tier panels are installed using multi-story scaffolding. Verticality adjustment is performed using threaded push-pull props.

Slab formwork is assembled from load-bearing frames (1.2 m wide) and telescopic props with crossheads (forkheads), onto which longitudinal beams (160 mm high) and transverse beams (140 mm high) are laid. Laminated plywood is laid over the beam grid. Dismantling of the systems is permitted exclusively after the concrete has reached the specified stripping strength. Detaching panels from the concrete surface is carried out using integrated screw jacks; the use of crane equipment to tear off the formwork is strictly prohibited.

Fig. 1 — Floor plan of a multi-unit building showing spatial layout, structural walls, and key architectural elements
Fig. 3 — Floor plan of a multi-unit building showing spatial layout, structural walls, and key architectural elements
1Exterior wall element, specifically a window opening in the load-bearing or enclosing masonry/concrete wall, providing natural light and ventilation to the interior space.
2Internal non-load-bearing partition wall, separating individual rooms or spaces within a unit, typically constructed of lighter materials such as drywall or thin masonry.
4Internal load-bearing wall, forming part of the primary structural system, providing support for the floor above and stability to the building framework.
5Stairwell or common circulation area, containing a flight of stairs for vertical access between building levels, enclosed by structural walls for fire safety and support.
6Living or functional room within a unit, defined by surrounding structural and partition walls, with specific dimensions indicating its area and layout.
7Exterior wall window opening, similar to element 1, indicating fenestration details along the building facade.
8Interior space or room, likely a secondary room or kitchen area within a unit, separated by internal partitions.
9Corridor or internal hallway space, facilitating movement between different rooms within a unit or providing access to the main stairwell.
10Architectural facade element, likely a semi-circular bay window or balcony projection, adding aesthetic value and increasing interior space.
11Window opening on the exterior wall, providing light and ventilation, consistent with the overall fenestration pattern of the building.
12Sanitary facility or bathroom unit, indicating the layout for plumbing fixtures and separated by specific partition walls for privacy and functional zoning.
  1. Installation of guide kicker rails along the contour of the structure to be concreted.
  2. Erection of formwork panels on one side of the wall to the full height of the floor and securing them with push-pull props.
  3. Installation of the opposing formwork side after reinforcement assembly, fastening the panels with tie rods.
  4. Assembly of slab formwork: installation of support frames, laying of beams (160 mm and 140 mm), and plywood decking.
  5. Dismantling using screw jacks for careful detachment of the panel from the concrete.
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4. Reinforcement Works

Reinforcement products (planar and spatial cages, C-14...C-16 meshes, individual bars with a diameter of 12-14 mm) are supplied to the installation zone by a tower crane. Elements weighing up to 50 kg can be installed manually. Spatial cages are transported with temporary wooden spacers to prevent deformation. The assembly of enlarged units is performed using jigs.

Prior to installing the cages, marking with the bar spacing is applied with chalk on the formwork surface. Clamps are used to temporarily fix the reinforcement in a vertical position. Ensuring the design concrete cover (distance between the reinforcement and the deck) is achieved by installing plastic spacers with a pitch of 1.0–1.2 m for vertical structures and 0.8–1.0 m for floor slabs.

Splicing of vertical and horizontal elements of working cages is primarily carried out by tying or arc welding (in compliance with ISO 17660 standard requirements). The completed reinforcement cage is subject to mandatory instrumental inspection (checking diameters, spacing, geometry) with the execution of a concealed works certificate prior to pouring concrete.

Fig. 1 — Transverse cross-section of a multi-story load-bearing wall structure detailing foundation footings, precast concrete floor diaphragms, vertical stair circulation, and timber pitched roof.
Fig. 4 — Transverse cross-section of a multi-story load-bearing wall structure detailing foundation footings, precast concrete floor diaphragms, vertical stair circulation, and timber pitched roof.
1Timber vertical king post/strut, typically 150x150mm cross-section, forming part of the primary roof truss system to support ridge loads
2Unheated attic space (roof void), enclosed by a timber rafter structural system and providing a thermal buffer for the building envelope
3Fourth-floor habitable volume, bounded by precast concrete floor slabs structurally situated at elevations +9.000 and +11.800
4Third-floor habitable room volume, maintaining a standardized architectural clear interior height of 2.800m
5Second-floor habitable space, resting on a 200mm thick precast reinforced concrete structural slab positioned at elevation +3.000
7Ground-floor interior space situated directly above the datum elevation ±0.000, serving as the primary entry-level functional area
8Subterranean basement level enclosed by reinforced concrete retaining walls, with finished floor elevation at -2.940 for utility routing
9Reinforced concrete strip foundation footing on grid line C, founded at elevation -3.440, distributing loads from the exterior load-bearing wall
10Entrance vestibule and lower stair landing, mediating the transition from the exterior grade level (-1.100) to internal circulation
11Precast reinforced concrete multi-step stair flight equipped with integrated steel handrails, serving as the primary vertical circulation route
12Reinforced concrete intermediate stair landing, allowing for half-turn directional changes between successive main floor levels
13Exterior stairwell fenestration elements; multi-pane window units providing essential natural daylighting and ventilation to the central core
14Central load-bearing masonry/concrete wall detailing standard interior doorway openings, providing structural support for the 6600mm floor spans
16Reinforced concrete continuous strip footing located on grid line A at depth -3.440, transferring accumulated vertical structural loads to the subgrade
  1. Cleaning bars from rust and dirt; verifying the compliance of diameters (12-14 mm) and reinforcement grades with the design.
  2. Chalk marking the spacing for installing reinforcement meshes and cages on the assembled side of the formwork.
  3. Installation of reinforcement elements using clamps for temporary fixation and welding/tying of splices.
  4. Installation of plastic spacers to form the concrete cover (spacing 1.0-1.2 m for walls, 0.8-1.0 m for slabs).
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5. Placement and Compaction of Concrete

Delivery of ready-mixed concrete to the site is carried out by transit mixers with a drum volume of at least 6.1 m³. The delivery of the mixture into the structure is implemented by two methods: either by a mobile concrete pump (horizontal reach 19 m, vertical 22 m) or by a tower crane in rotary skips (buckets) with a capacity of 1.0 m³ equipped with a sector gate. The concrete pump requires a concrete mix with a slump (workability) of 100–220 mm (class S3-S4 according to EN 206/ISO 22966) to avoid segregation and blockage of the delivery pipeline.

Wall concreting is carried out in sections between technological or door openings. The mix is placed in horizontal layers 30–40 cm thick. The interval between placing adjacent layers must be from 40 minutes to 2 hours (before the initial setting of the previous layer). Compaction is performed by internal vibrators with a vibrating head length of 440 mm. The vibrator must penetrate the previously placed layer by 5–10 cm to ensure a monolithic joint. The spacing of vibrator insertions should not exceed 1.5 times its radius of action.

Completion of vibration at a single position is determined by the cessation of mix settlement and the appearance of laitance on the surface. Touching the reinforcement and formwork panels with the vibrator head is not allowed to prevent shifting the cage and damaging the plywood. Additional rodding is required in the corners of the structure. Walking on concreted slabs is permitted only after the concrete reaches a compressive strength of at least 1.5 MPa (15 kgf/cm²).

Fig. 1 — Layout of a construction site plan detailing rail-mounted tower crane operations, temporary road networks, and site logistics
Fig. 5 — Layout of a construction site plan detailing rail-mounted tower crane operations, temporary road networks, and site logistics
1Main building footprint under construction, 13.2m in width, defining the primary structural work area, positioned 6.0m from the crane track axis
2Rail-mounted tower crane, featuring a 20m maximum working radius (R=20m) and 5-ton lifting capacity (Q=5T), utilized for heavy material handling across the site
3Crane rail track assembly, laid on a stabilized subgrade, enabling longitudinal movement of the crane parallel to the building facade
4Mechanical track end stop (buffer), secured to the rail extremities to physically prevent the crane bogies from over-traveling the safe track limits
5Open material storage and staging area, situated directly adjacent to the crane track within the optimal lifting radius to facilitate efficient hoisting operations
6Temporary site cabins and welfare facilities, positioned securely within the site boundary while strategically avoiding primary overhead overhead drop zones
7Temporary utility installations, comprising electrical transformer substations and site services, located near the main entrance for direct grid connections
8Vehicular access and egress gates with directional traffic control, ensuring organized logistics flow between public roads and the internal site network
9Demarcation boundary of the crane danger zone, sweeping a safety radius beyond the 20m jib outreach to indicate the maximum potential hazard area from swinging loads
10Temporary perimeter hoarding and continuous fencing, enclosing the construction limits to secure the site perimeter and prevent unauthorized public access
11Directional site floodlight masts, strategically distributed at intervals along the perimeter fencing to provide adequate illumination for low-light working conditions
12Temporary vehicular site road, 3.5m in width, typically paved with reinforced concrete slabs or compacted aggregate to support continuous heavy truck circulation
  1. Checking the operability of equipment (concrete pump, crane, internal vibrators) and acceptance of concealed works.
  2. Delivery of concrete mix (slump 100-220 mm) and its layer-by-layer placement with a thickness of 30-40 cm.
  3. Compaction of concrete using internal vibrators with the head penetrating 5-10 cm into the lower layer.
  4. Slow extraction of the vibrator (without turning off the motor) to fill the void.
  5. Providing moisture curing for freshly placed concrete and protecting it from mechanical damage.
6

6. Quality Control and Tolerances

Comprehensive operational control is carried out at each stage of production. Prior to concreting, the displacement of formwork axes is checked — the tolerance is no more than 8 mm. The deviation of the assembled wall formwork plane from the vertical over the entire floor height must not exceed 20 mm. The instrumental base for control includes calipers, builder's levels, optical levels, and theodolites.

Tolerances for reinforcement are strictly regulated: displacement of reinforcing bars must not exceed 1/5 of the maximum diameter of the installed bar. For the concrete cover: with a design thickness of more than 15 mm, a deviation of ±15 mm is allowed (unless otherwise specified by local building codes); with a thickness of 15 mm or less, strictly ±3 mm. The deviation of vertical cage axes is limited to 5 mm.

The quality of the concrete mix is monitored by the construction laboratory. Upon receipt at the site, workability is measured using a slump cone (slump 100–220 mm) and the temperature of the mix is recorded. During concreting, visual control of compaction is maintained (by the cessation of air bubbles rising). It is mandatory to take sample cubes for laboratory compressive strength testing at the ages of 7 and 28 days.

Fig. 1 — Layout plan of precast strip foundations showing the arrangement of foundation cushions and blocks
Fig. 6 — Layout plan of precast strip foundations showing the arrangement of foundation cushions and blocks
1Precast reinforced concrete foundation cushion (FL), standard width, serves to distribute building loads to the soil
2Precast reinforced concrete foundation cushion (FL), narrower width, used in specific load-bearing segments
3Corner precast reinforced concrete foundation cushion, providing structural continuity at foundation intersections
4Precast concrete foundation block (FBS), standard length, forming the foundation wall stem
5Precast concrete foundation block (FBS), intermediate length, used for modular fitting within the wall layout
6Precast concrete foundation block (FBS), short length, used for closing gaps and modular adjustments
7Reinforced concrete floor slab panel, solid or hollow-core, forming the basement ceiling
8Reinforced concrete floor slab panel, adjacent segment, providing structural floor continuity
9Reinforced concrete floor slab panel, varying dimension, tailored for specific bay widths
10Reinforced concrete floor slab panel, specialized segment, accommodating floor penetrations or specific loads
11Reinforced concrete floor slab panel, edge segment, completing the floor assembly at the building perimeter
12Reinforced concrete floor slab panel, intermediate segment, spanning between foundation walls
13Reinforced concrete floor slab panel, connecting segment, integrating the floor diaphragm
18In-situ concrete infill or make-up section, cast in place to close non-standard gaps between precast elements
19In-situ concrete infill or make-up section, specialized location, ensuring structural continuity and load transfer
  1. Instrumental verification of wall formwork deviations from the vertical (tolerance 20 mm).
  2. Checking the concrete cover with a measuring ruler (tolerance ±3 mm for cover ≤ 15 mm).
  3. Performing a slump test for each batch of concrete before pumping.
  4. Sampling concrete test specimens (cubes) for laboratory compressive strength tests.
7

7. Labor Organization and Crew Composition

Process efficiency is ensured by a clear division of labor and adherence to qualification requirements. Formwork installation and dismantling are performed by a specialized crew of four: one 4th-grade fitter, one 3rd-grade fitter, and two 2nd-grade riggers. This crew is responsible for panel installation, alignment, fastening, and subsequent dismantling with cleaning.

Reinforcement works are assigned to a crew of six: one 6th-grade steel fixer (crew leader), four 5th-grade steel fixers, and one electric welder. High qualification is required due to the need for precise spatial fixation of complex nodes and execution of critical welded joints.

Concrete works are performed depending on the delivery method. When using a tower crane and rotary skips, a crew of five concrete workers is required for receiving, distributing, and vibrating the mix. When using a mobile concrete pump, the crew is optimized to three people: a pump operator, an assistant operator (managing the placing boom delivery hose), and one concrete worker operating the internal vibrator.

Fig. 1 — Vertical formwork assembly with integrated cantilevered working platform and adjustable diagonal struts for concrete wall/column construction
Fig. 7 — Vertical formwork assembly with integrated cantilevered working platform and adjustable diagonal struts for concrete wall/column construction
14Reinforcement cage or pre-tied rebar assembly within the formwork, forming the structural core of the concrete element
16Formwork tie rod assembly with wing nuts and anchor plates, used to withstand lateral concrete pressure and maintain desired wall thickness
18Adjustable diagonal strut (push-pull prop), anchored to the slab/foundation and formwork to plumb and stabilize the vertical panels
22Cantilevered working platform with grating and guardrails, attached to the formwork for safe personnel access during pouring and vibration operations
23Vertical safety barrier or edge protection system mounted on the outer edge of the working platform to prevent falls
  1. Safety briefing for crews before the start of the shift (with the issuance of permits for work at heights).
  2. Task distribution: formwork fitters — slinging and alignment of panels; steel fixers — tying meshes; concrete workers — receiving and compacting the mix.
  3. Providing workers with PPE: hard hats, safety harnesses, rubber gloves, and boots (for concrete workers).
Fig. 1 — Installation layout of frames, support racks, and diagonal cross-pieces in a structural bay
Fig. 8 — Installation layout of frames, support racks, and diagonal cross-pieces in a structural bay
1Structural frame unit, providing primary support and forming the main grid structure within the designated bay area.
2Support rack or post, positioned independently from the main continuous frames, serving as an intermediate vertical load-bearing element.
3Diagonal cross-piece (bracing), installed between frame members to provide lateral stability and resist shear forces.
Fig. 1 — Layout plan for the installation of longitudinal beams within a structural grid
Fig. 9 — Layout plan for the installation of longitudinal beams within a structural grid
1Transverse structural beam, part of the main grid framework, connecting the longitudinal elements and transferring loads to the supports
2Transverse secondary beam or strut, providing lateral support and rigidity between the primary longitudinal beams
3Primary longitudinal beams, spanning the length of the structural bay and serving as the main load-bearing members
4Diagonal bracing members, forming an X-pattern between the longitudinal and transverse beams to provide shear resistance and lateral stability
5Adjacent decking or floor slab elements, positioned alongside the main structural beam grid
6Connection nodes or bearing points where the longitudinal beams intersect and are supported by the transverse grid elements
Fig. 1 — Plan view detailing the installation of transverse and longitudinal beams in a ribbed floor structure
Fig. 10 — Plan view detailing the installation of transverse and longitudinal beams in a ribbed floor structure
1Reinforced concrete primary longitudinal beam (girder), positioned along grid line A, acting as the main load-bearing element for the transverse secondary beams.
2Perimeter or intermediate reinforced concrete structural wall/beam bounding the ribbed floor panel, providing lateral stability and edge support.
3Transverse secondary beams (ribs), installed perpendicularly to the primary girders, spaced at regular intervals to directly support the floor slab above.
4Reinforced concrete primary longitudinal beam along grid line B, functioning parallel to beam 1 to support the opposite ends of the transverse secondary beams.
5Additional transverse secondary beams within the adjacent span (between grid lines 3 and 4), continuing the ribbed support system across the structural bay.
Fig. 1 — Layout plan of plywood sheets on a ribbed structural framework
Fig. 11 — Layout plan of plywood sheets on a ribbed structural framework
1Plywood sheet, serves as the main decking or cladding surface, laid over the supporting framework
2Longitudinal edge rib or beam, provides support along the perimeter or main axis B of the structural assembly
3Main transverse support beam or base rib, located along axis A, structurally larger to support the primary loads
4Transverse stiffening rib, spans between longitudinal beams to provide intermediate support for the plywood sheets
Fig. 1 — Cross-section 1-1 of falsework and shoring system for suspended reinforced concrete slab construction
Fig. 12 — Cross-section 1-1 of falsework and shoring system for suspended reinforced concrete slab construction
1Modular steel shoring towers (falsework frames), positioned vertically on the lower concrete floor to provide the primary high-capacity load-bearing support for the upper slab formwork
2Telescopic steel post shore (adjustable prop), installed vertically as localized supplementary load-bearing support between the main modular shoring towers
3Integral horizontal and diagonal stiffening frame (ledger/bracing) within the shoring tower assembly, designed to provide lateral stability and prevent buckling under heavy axial loads
4Threaded adjustable U-head jack (forkhead), fitted into the top of the vertical shoring uprights to securely seat and precisely level the primary support beams
5Primary load-bearing beam (stringer), typically a steel profile or heavy H20 timber, spanning across the U-head jacks to distribute the weight of the secondary framing and decking
6Continuous formwork decking system (sheathing), forming the direct base mold surface for pouring the upper reinforced concrete slab at the 3000mm elevation
Fig. 1 — Structural framing plan showing the layout of floor slabs, continuous beams, and connection details along grid axes A, B, and C
Fig. 13 — Structural framing plan showing the layout of floor slabs, continuous beams, and connection details along grid axes A, B, and C
1Precast reinforced concrete hollow-core floor slab, spanning between primary beams, designed for distributed floor loads.
2Solid precast reinforced concrete floor slab panel, utilized in specific bays, providing localized structural support and load transfer.
3Primary longitudinal reinforced concrete continuous beam, extending across multiple spans, serving as the main support for the floor slabs.
4Secondary continuous reinforced concrete beam, running parallel to primary beams, assisting in load distribution from the slabs.
5Perimeter reinforced concrete edge beam or lintel, providing structural continuity and support at the building's exterior boundary.
6Transverse reinforced concrete connecting beam, spanning between main longitudinal beams to provide lateral stability and tie the structural frame.
7Intermediate transverse reinforced concrete beam, located between major grid lines, distributing localized loads from specific slab configurations.
8Reinforced concrete support bracket or corbel, cast monolithically with the columns or main beams, providing direct bearing support for secondary members.
9Precast concrete infill panel or spacer, placed between hollow-core slabs to ensure alignment and complete the floor diaphragm.
10Solid continuous reinforced concrete panel segment, used where structural continuity or increased load capacity is required within the slab system.
11Structural steel or concrete connecting plate/tie, used for securing precast elements to the main load-bearing frame.
12Embedded steel connection detail or weld plate, facilitating the structural joining of precast beams and columns.
13Monolithic reinforced concrete joint or pour strip, cast in-situ to structurally connect and integrate adjacent precast floor slabs.
14Reinforced concrete header beam or lintel over openings, distributing loads from the structure above to adjacent columns or load-bearing walls.
15Structural tie or reinforcing bar dowel extending from continuous beams, intended for splicing with adjacent elements to ensure structural continuity.
Fig. 1 — Typical reinforcement elevations and detailing for continuous structural concrete beams across multiple grid axes, showing longitudinal bars, stirrup spacing, and lap splice zones.
Fig. 14 — Typical reinforcement elevations and detailing for continuous structural concrete beams across multiple grid axes, showing longitudinal bars, stirrup spacing, and lap splice zones.
1Main bottom longitudinal reinforcement bar, providing tension capacity in the mid-span of the continuous beam.
2Main top longitudinal reinforcement bar, providing tension capacity over the supports and continuity across spans.
3Supplementary top longitudinal reinforcement bar, placed to accommodate localized peak negative bending moments.
4Transverse reinforcement (stirrups), spaced at regular intervals (e.g., 900mm, 1015mm) to resist shear forces.
5Additional bottom longitudinal reinforcement bar in specific spans to handle increased positive bending moments.
6Vertical tie or link within the cross-section, maintaining the position of the longitudinal bars and contributing to shear resistance.
7Secondary top longitudinal reinforcement bar, providing additional continuity or compression reinforcement near supports.
8Specific tie or stirrup detailing at support zones (Grid Axis B) to confine concrete and resist high shear.
9Vertical reinforcement bar or dowel extending into the support or adjacent structural element for anchorage.
10Top reinforcement lap splice zone, ensuring full development of tensile forces between adjacent bars.
Fig. 1 — Structural framing plan of a floor system using precast concrete ribbed slabs, detailing slab layout, grid dimensions, and cross-sectional reinforcement connections.
Fig. 15 — Structural framing plan of a floor system using precast concrete ribbed slabs, detailing slab layout, grid dimensions, and cross-sectional reinforcement connections.
4Reinforced concrete topping layer over precast slabs, providing monolithic behavior and surface leveling
5Standard ribbed precast concrete floor slab, positioned longitudinally between structural axes
6Special ribbed precast concrete floor slab, potentially reinforced for heavier loads or specific boundary conditions
7Corner or edge ribbed precast concrete slab, designed to fit structural boundaries and framing corners
8Ribbed precast concrete slab positioned centrally within a bay, contributing to the main floor area
9Longitudinal reinforcing bars or structural connection details between adjacent precast ribbed slabs
10Cross-tying reinforcement or load-transfer element connecting parallel precast ribbed slabs
11Localized reinforcement or connection detail at the intersection of precast slabs and supporting elements
15Intermediate ribbed precast concrete slab, providing structural continuity in larger framing bays
16Insulation or leveling layer beneath the concrete topping, filling the space between slab ribs
Fig. 1 — Plan view of a precast reinforced concrete ribbed slab floor/roof system, detailing the layout of main ribbed panels, supplementary panels, edge beams, and structural grid dimensions.
Fig. 16 — Plan view of a precast reinforced concrete ribbed slab floor/roof system, detailing the layout of main ribbed panels, supplementary panels, edge beams, and structural grid dimensions.
1Standard precast reinforced concrete ribbed slab panel, main spanning element with longitudinal ribs
2Supplementary or edge precast reinforced concrete ribbed slab panel, dimensioned for specific grid bays
3Precast reinforced concrete ribbed slab panel, variant for specific load or boundary conditions
4Precast reinforced concrete panel, possibly a flat slab or specialized ribbed section for varied span or opening requirements
12Transverse stiffening rib or connection element between adjacent precast panels
13Longitudinal structural tie or connection detailing between adjacent slab panels or supporting elements
14Precast reinforced concrete panel, specialized for central or specific grid locations, possibly accommodating structural transitions or openings
Fig. 1 — Construction site layout plan indicating crane positioning, material storage areas, and access infrastructure
Fig. 17 — Construction site layout plan indicating crane positioning, material storage areas, and access infrastructure
1Tower crane, positioned on a dedicated track system for linear movement along the construction site, with a specified operational radius and lifting capacity.
2Concrete mixer truck, depicted in a designated operational zone adjacent to the concrete pump, facilitating the continuous supply of ready-mix concrete.
3Concrete pump with an articulating boom, positioned to receive concrete from the mixer trucks and deliver it to the required pour locations within the site.
4Open material storage areas, designated with hatched patterns, located adjacent to the main structure for easy access by the tower crane and site personnel.
5Stationary concrete batching plant or storage silo, located within a designated operational area near the concrete pump for efficient on-site concrete production or storage.
6Crane track base, constructed of compacted earth or gravel, providing a stable foundation for the rails and movement of the tower crane.
7Precast concrete elements or formwork panels, stored in an organized grid pattern within the footprint of the main structure being built.
8Outline of the main building or structure under construction, divided into grid sections and partially filled with stored materials or ongoing work.
12Perimeter access path or scaffolding zone around the main structure, facilitating movement of workers and smaller equipment.
13Crane track rails, laid parallel to the construction structure, allowing the tower crane to traverse the length of the site.
14Additional designated storage or staging area, marked with diagonal hatching, located at the ends of the main building footprint.
17End stops or buffers on the crane track, ensuring the tower crane does not travel beyond the safe operational limits of the rail system.
Fig. 1 — Cross-sectional elevation of a multi-story building construction site featuring a tower crane, temporary formwork system, and structural grid layout.
Fig. 18 — Cross-sectional elevation of a multi-story building construction site featuring a tower crane, temporary formwork system, and structural grid layout.
1Tower crane counterweight, consisting of stacked concrete blocks positioned on the rotating platform to provide stability against overturning moments.
3Crane hook block Assembly, suspended from the jib, used for lifting and placing construction materials onto the structure.
6Crane track or foundation fixing point, anchoring the base of the tower crane to the ground, with a span of 4500 mm.
7Top-level floor slab construction showing temporary formwork and shoring system supporting the freshly poured or soon-to-be-poured concrete deck.
8Cantilevered safety catch net or scaffolding bracket attached to the building perimeter to provide fall protection and debris containment.
Fig. 1 — Site layout plan for foundation concrete placement showing equipment positioning and work zones
Fig. 19 — Site layout plan for foundation concrete placement showing equipment positioning and work zones
2Truck mixer (auto-concrete mixer), positioned for discharging concrete into the pump hopper
3Auto-concrete pump with an articulated placement boom, used for distributing concrete across the foundation area
4Designated material storage area or staging zone, located adjacent to the building footprint
5Crane track area with fencing, providing a linear path for the tower crane operation
12Reinforcement cage or mesh (formwork/rebar grid) prepared for concrete pouring within the foundation structure
13Perimeter formwork or safety fencing enclosing the foundation construction zone
14Additional material storage area or staging zone on the opposite side of the building footprint
15Freshly poured concrete area within the foundation slab, currently being leveled or cured
16Tower crane positioned on its track, utilized for lifting and placing materials across the site
Fig. 1 — Transverse cross-section of a multi-story reinforced concrete frame building under construction, detailing temporary shoring systems, safety scaffolding, and hoisting equipment
Fig. 20 — Transverse cross-section of a multi-story reinforced concrete frame building under construction, detailing temporary shoring systems, safety scaffolding, and hoisting equipment
3Mobile telescopic truck crane with deployed hydraulic outriggers, positioned at grade level to hoist formwork, rebar, and construction materials to the active working deck at elevation +9.000m
6Horizontal formwork decking system (comprising plywood facing and primary/secondary joists) for the cast-in-place reinforced concrete roof slab, supported by load-bearing shoring towers resting on the intermediate slab at elevation +6.000m
7Exterior cantilevered safety scaffolding (catch platform) featuring guardrails, bracket-mounted to the perimeter reinforced concrete columns below the working level to provide fall protection and safe worker access
Fig. 1 — Gantt chart illustrating the project schedule over a 52-day period with various task durations.
Fig. 21 — Gantt chart illustrating the project schedule over a 52-day period with various task durations.
1Solid continuous line representing the main project duration from day 0 to day 17
2Dashed line indicating a specific task or phase running from day 0 to day 17
3Dashed line indicating a specific task or phase running from day 0 to day 17
4Dashed line indicating a specific task or phase running from day 0 to day 17
5Dashed line indicating a specific task or phase running from day 0 to day 17
6Dashed line indicating a specific task or phase running from day 3 to day 17
7Dashed line indicating a specific task or phase running from day 3 to day 17
8Dashed line indicating a specific task or phase running from day 3 to day 17
9Dashed line indicating a subsequent task or phase starting from day 17 and concluding on day 31
Fig. 1 — Gantt chart illustrating project schedule with multiple tasks and their respective timelines.
Fig. 22 — Gantt chart illustrating project schedule with multiple tasks and their respective timelines.
1Dotted line task, extending from day 17 to day 30, representing a specific project activity or phase.
2Dashed line task, spanning from day 17 to day 30, indicating a parallel or concurrent activity.
3Solid line task, occurring from day 17 to day 30, likely denoting a primary or critical path activity.
4Solid line task, starting on day 30 and concluding on day 38, following the completion of tasks 1, 2, and 3.
5Dotted line task, running concurrently with task 4 from day 30 to day 38, indicating a related secondary activity.
6Solid line task, beginning on day 38 and ending on day 41, representing a subsequent phase dependent on previous tasks.
7Solid line task, starting slightly before task 6 concludes, from day 40 to day 45, showing an overlapping project activity.
8Baseline or reference line, potentially indicating the completion or a significant milestone at day 45.
Fig. 1 — Project schedule Gantt chart detailing task durations over 52 working days
Fig. 23 — Project schedule Gantt chart detailing task durations over 52 working days
1Task schedule line, dotted, spanning working days 40 to 46
2Task schedule line, dotted, spanning working days 40 to 46
3Task schedule line, dotted, spanning working days 40 to 46
4Task schedule line, dashed, spanning working days 40 to 46
5Task schedule line, solid, spanning working days 43 to 46
6Task schedule line, solid, spanning working days 47 to 52
7Project duration timeline, dashed line, spanning the entire project period from day 0 to day 52
8Column for task description or identification (currently empty)
9Row representing a specific task or phase in the project schedule
10Row representing a specific task or phase in the project schedule
Tips & Recommendations
!
It is strictly prohibited to use a tower crane to tear formwork panels away from the concreted surface. To ensure safe dismantling without damaging the plywood and profile, standard screw jacks must be used.
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When pumping the mix with a mobile concrete pump, maintain the slump in the range of 100-220 mm (class S3-S4). A stiffer mix will lead to segregation and blockages in the delivery pipeline.
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Observe the layer overlap interval during concreting. The pause between placing layers (30-40 cm) should be between 40 and 120 minutes to avoid the formation of 'cold joints'.
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During concrete compaction, do not allow the internal vibrator to touch the reinforcement or panel deck. This can lead to unacceptable displacement of the reinforcement cage and defects on the concrete surface.
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Pedestrian traffic on concreted slabs and the start of formwork installation for the next tier are permitted only after the concrete has reached a strength of at least 1.5 MPa (15 kgf/cm²).