Roof Joist Thickness

Ceilings directly applied to the bottom edge of the floor members or equivalent 1x or 2x strapping is a.

Roof joist thickness.

The difference in the joist sizes applies to the width of the boards which determines the height of the ceiling. Joist girders serve as primary framing members with simple spans to support concentrated loads for a roof or floor system. These concentrated loads often include standard steel joists that are in turn supporting steel roof or floor deck. The full version allows any size.

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. Flat roof joist calculator. 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. 1 enter joist details 1 1 span and joist spacing.

Usually 400 450 or 600mm but any value can be used up to 610mm max. Featuring trus joist tji joists for floor and roof applications. This is the distance between joist centres. This demo version is fixed at 1m clear span.