Roof Joist Thickness

How thick a roof is depends mostly on the size of the rafters used in the roof construction but there are additional elements including the thickness of the roof sheathing and the thickness of the shingles you choose.

Roof joist thickness.

This demo version is fixed at 1m clear span. These concentrated loads often include standard steel joists that are in turn supporting steel roof or floor deck. Thickness generally improves floor. Ceilings directly applied to the bottom edge of the floor members or equivalent 1x or 2x strapping is a.

The full version allows any size. Usually 400 450 or 600mm but any value can be used up to 610mm max. Joist girders serve as primary framing members with simple spans to support concentrated loads for a roof or floor system. Featuring trus joist tji joists for floor and roof applications.

A 2 by 4 inch joist for instance hangs into the room by 4 inches which may leave the ceiling high while a 2 by 12 inch joist in the same position hangs 12 inches into the room which decreases the ceiling height by 8 inches. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. This is the distance between joist centres. 1 enter joist details 1 1 span and joist spacing.