Roof Joist Thickness

Featuring trus joist tji joists for floor and roof applications.

Roof joist thickness.

1 enter joist details 1 1 span and joist spacing. These concentrated loads often include standard steel joists that are in turn supporting steel roof or floor deck. 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. This is the distance between joist centres.

Joist girders serve as primary framing members with simple spans to support concentrated loads for a roof or floor system. Ceilings directly applied to the bottom edge of the floor members or equivalent 1x or 2x strapping is a. 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 full version allows any size.

This demo version is fixed at 1m clear span. Thickness generally improves floor. The roof s main job however is to protect the interior of the house and personal belongings from the outside elements. Flat roof joist calculator.