Loadbearing structures — primary frame works
This stage covers installation of load-bearing walls, columns, beams, slabs, rough staircases and primary steel structures. Work focuses on achieving design geometry, structural capacity and reliable joints while preventing cracks and corrosion. Key activities include formwork and shoring, reinforcement placement, concrete casting or steel erection, embedment of anchor items and interim inspections. Coordination with geotechnical, structural and MEP teams and strict control of tolerances, curing and temporary supports is common practice to reduce rework and ensure structural integrity.
Stage control summary
Overview
Structure is where early geometry, reinforcement, formwork, and connection decisions become locked into the physical building. The expensive errors are not only structural-capacity issues; they are load-path interruptions, misplaced anchors, low concrete cover, weak curing, honeycombing, slab deflection, and joints that later create cracks, leaks, or finish conflicts.
Stage-level control gates
- Verify grid, level, plumbness, and load-path continuity before each structural pour or element closure.
- Check reinforcement, concrete cover, embeds, sleeves, anchor bolts, and construction-joint preparation before concrete arrives.
- Inspect formwork stability, propping, pour sequence, and access so geometry is not lost during placement.
- Require curing and early-age protection plans for slabs, beams, columns, and exposed concrete surfaces.
- Do not allow service penetrations, openings, or late fixings through structural zones without reviewed approval.
Work-package checklist
Walls are accepted too often as visible geometry only. For cost control they must be checked as structural, dimensional, and interface elements because every later opening, facade return, plaster tolerance, and service chase depends on them.
What to verify
- Confirm wall position, plumbness, thickness, opening dimensions, and bearing logic before the next element closes the work.
- Check reinforcement, ties, embedded items, and construction-joint treatment where walls connect to slabs, beams, and columns.
- Verify that service chases or penetrations do not weaken structural zones or create uncontrolled crack paths.
What usually goes wrong
- Walls pass visual inspection but drift from grid, creating facade and interior tolerance problems.
- Openings are corrected by finishes rather than by structural geometry control.
- Service routes are cut after the wall is built and interrupt the intended load path.
Columns concentrate load-path, cover, formwork, and embed risk. A small alignment or cover mistake here can become a structural review, facade tolerance issue, or long-term corrosion problem.
What to verify
- Check column location, verticality, cage stability, lap zones, and cover spacers before concrete placement.
- Verify formwork bracing and pour method so the column does not move or honeycomb during placement.
- Confirm embeds, starter bars, and future connection points are fixed to templates, not positioned by eye.
What usually goes wrong
- Cages shift during the pour and reduce cover on one face.
- Column faces bulge or twist because formwork bracing was weak.
- Honeycombing is patched cosmetically before the structural significance is assessed.
Slabs connect structural performance to finish quality. They set levels, support partitions, carry future loads, and define whether wet areas, floors, ceilings, and doors will behave as expected.
What to verify
- Verify reinforcement, cover, openings, sleeves, edge formwork, and level control before the pour.
- Confirm curing, early loading restrictions, and protection against premature cutting or heavy storage.
- Check slab level, flatness, deflection-sensitive areas, and drainage-critical zones before screed or finish work starts.
What usually goes wrong
- Sleeves and openings are added after reinforcement inspection and weaken local slab logic.
- Young slabs are loaded too early by blocks, tiles, equipment, or stacked materials.
- Level drift is hidden by screed until doors, drains, tiles, or thresholds expose the defect.
Joints and embeds are small in size but high in consequence. They decide whether steel, facade brackets, equipment supports, and future packages connect to the frame without drilling, guessing, or breaking finished concrete.
What to verify
- Check anchor-bolt templates, embedded plates, sleeves, and cast-in items against the final connection drawings.
- Verify construction joints are clean, keyed, reinforced, and waterproofed where required before the next pour.
- Record embedded item locations clearly for later steel, facade, MEP, and handover teams.
What usually goes wrong
- Anchor bolts move during the pour and no longer match base plates.
- Cold joints are accepted without surface preparation or water control.
- Embed locations are not documented, so later trades drill blindly into structural concrete.
Evidence to collect before sign-off
- Pre-pour photo record of reinforcement, cover spacers, sleeves, anchors, embeds, and formwork condition.
- Survey or dimensional records for grid, level, plumbness, slab edges, openings, and stair geometry.
- Pour, curing, concrete delivery, and defect-repair records with sign-off before follow-on trades cover the structure.
Related glossary
Continuous route by which gravity, wind, and other forces move through the structure into the foundation.
Distance between reinforcement and concrete surface that protects steel and helps structural performance.
Post-pour moisture and temperature control that helps concrete develop strength and durability.
Temporary mould and support system that holds wet concrete in the required shape until it can carry itself.
Joint formed where concrete placement stops and later continues, requiring structural and waterproofing continuity.
Voids or rough porous zones in concrete caused by poor compaction, congestion, leakage, or placement defects.
Embedded or post-installed fixing used to transfer forces between concrete, steel, equipment, or facade elements.
Vertical movement or sag of a slab under load that can affect structure, finishes, partitions, and drainage.
Steel elements that increase concrete tensile capacity.
Specified compressive strength class of concrete.
Use this with the rest of the product
Switch between stage guidance, checklist control, and cost-of-error analysis. The same work packages should tell one consistent story across all three views.