Roof Joist Thickness

1 enter joist details 1 1 span and joist spacing.

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. 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. This is the distance between joist centres.

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. The difference in the joist sizes applies to the width of the boards which determines the height of the ceiling. 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. Flat roof joist calculator. Ceilings directly applied to the bottom edge of the floor members or equivalent 1x or 2x strapping is a. Featuring trus joist tji joists for floor and roof applications.