Roof Joist Construction Details

End bearing in hanger supported by a beam.

Roof joist construction details.

Good installation begins with specification of the correct joist for the application. Double the tiles at eaves and project them 1 inch over the rear edge of gutters. End bearing with blocking panels. This will give additional stability to the roof structure.

Secure each tile with two large head roofing nails. Intermediate bearing with blocking panels. For additional stability you can also use steel joists that are built into one or both of the walls. Lay 10 or 12 inch tiles with 1 inch head lap on the sides of dormers.

End bearing in hanger supported by i joist s 44kb. Lay all tiles within 1 foot of hips ridges and abutting vertical surfaces in roofer s cement. I joist construction details. The construction of the flat roof is similar to that of the timber upper floor.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. In the uk a concrete tiled roof would normally have rafters at 600 mm 24 in centers roof battens at 300 mm 12 in centers and ceiling joists at 400 mm 16 in centers. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. The united states still uses imperial units of measurement and framing members are typically spaced sixteen or twenty four inches apart.

I joists in floor and roof applications. End bearing with rim joist. In addition to floor and roof framing details this guide includes recommendations for cantilevers and placement of web holes.