Structural Residential Roof Truss Design

The truss plate manufacturer s engineer usually reviews and seals the individual truss designs on behalf of the truss fabricator.

Structural residential roof truss design. Structural model of truss truss girder self wt 4 05 k 4 05 k 80 ft x 25 ft 2 03 psf 18 03 psf bar joist wt 9 plf pd int dead load at an interior panel point 18 025 psf x 25 ft x10 ft 4 51 k due roof ceiling wt truss girder 9 plf x 25 ft 0 225 k due purlin wt 4 73 k pd. The chords are located at the top and bottom of the truss. Shop roof trusses spacer floor truss. This article will focus on timber roof truss design in residential construction.

Chord members web members and connections. A mono truss roof allows for more sunlight and visual space proper drainage and relatively cheaper. Residential structural design guide 3 3. Typically the building designer or builder will contract with the truss fabricator who will supply a truss layout and a structural design of each significant element of the roof system.

Trusses have several key components. Roof and wall sheathing gravity and wind loads floor diaphragms and shear walls in plane lateral overturninand g loads 6. It s often used for sheds garages or extension of an existing roof. A truss is a prefabricated wooden structure that integrates a triangular webbing of structural members to provide support for the roof above while tying the outside walls of the house together.

Roof rafters trusses and beams. Typical residential loading covers standard decking and shingles metal along with the sheetrock on the ceiling. In residential construction timber roof trusses have been used for decades to support floor and roof systems. Chapter 3 design loads for residential buildings typical load combinations used for the design of table 3 1.

A mono truss is a one sloped truss that forms a right angle triangle. In this type of truss roof a high collar beam and two struts make a wide and open expanded area which forms a wide livable space. Attic truss roof design is intended to provide a solution for additional living area within the roof space. Overview building design truss design retaining wall design tall wall design requests.

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