Category: Design
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
A section is a drawing of an imaginary vertical cut through the building. It shows what a plan cannot: heights, slab thicknesses, beams, suspended ceilings and wall and roof build-ups.
Why it matters on a project
It gives clear room heights and the space above ceilings for services, and it is a key reference for vertical quantities.
Common mistake
Relying on one section for the whole building, when stairs, entrances and level changes need their own.
Frequently asked questions
How many sections does a building need?
At least two in perpendicular directions, plus extra sections for stairs, level changes and special details.
Is a structural section the same as an architectural one?
No. The architectural section shows spaces, finishes and heights; the structural one shows concrete elements and their reinforcement.
Related terms
- LevelThe vertical height of a point relative to a datum (zero level).
- Elevation (facade)A drawing of the building’s external face showing openings, materials and heights.
- Construction drawingsDetailed drawings used to build the work on site after design approval, including dimensions, levels and details.
- Suspended (false) ceilingA secondary ceiling hung below the structural slab to conceal services and improve acoustics and lighting.
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