Category: Structure & materials
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
A solid slab is a full-thickness concrete slab with no voids, reinforced in one or two directions, used for short and medium spans and roofs carrying concentrated loads.
Why it matters on a project
It handles point loads and makes fixing hangers easy, but it is heavier and uses more concrete than voided slabs on larger spans.
Measurement and pricing
Concrete in cubic metres, rebar in tonnes, formwork in square metres.
Worked example
A 10 × 12 m slab 20 cm thick: volume = 10 × 12 × 0.20 = 24 m³ of concrete, with about 120 m² of soffit formwork.
Common mistake
Pouring without confirming service openings, then breaking the concrete later to make them.
Frequently asked questions
What is a typical solid slab thickness?
The design sets it by span and load; in villas it is often between 15 and 25 cm.
Which is better for a villa, solid or ribbed?
Neither in general: ribbed is lighter on longer spans, solid suits point loads and many openings.
Related terms
- Hollow-block (ribbed) slabA slab with concrete ribs between hollow blocks to reduce weight and increase spans.
- Reinforced concreteConcrete containing steel reinforcement to resist the tensile forces concrete alone cannot carry.
- CantileverA structural element fixed at one end and free at the other, such as balconies and canopies.
- Reinforcement (rebar)Steel bars placed inside concrete per bar-bending schedules to strengthen structural elements.
Read next
- Work out quantities with our free calculators: concrete, tiles, paint and plaster. Open the calculators
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