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Joist hanger (bearing 50 mm)

Support beam

-400 mm ——400 mm -12.5-mm plasterboard secti0n A-A

Joist cross-section (47 x 200)

Support beam

-400 mm ——400 mm -12.5-mm plasterboard secti0n A-A

1. Joist geometric properties

Breadth of joist, b

Depth of joist, h

Joist spacing, Js

Clear span of joists between inside edge of hanger supports, 4

Bearing length, 4

Flooring thickness, t

Width of flooring per metre, bt

Effective span of a joist, I

Second moment of area of a joist,

^joist

Second moment of area of flooring/metre width - ignoring discontinuities at the edges of the floor panels, If

Width of floor structure, wf

Joist cross-section (47 x 200)

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