Residential Roof Truss Spans

Up to 40 open framing for plumbing.

Residential roof truss spans.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration. Keep in mind that these tables are for estimations only. Post frame trusses can be used for agricultural residential commercial or industrial use.

Maximum deflection is limited by l 360 or l 480 under live load. Spacing of trusses are center to center in inches. They have not been updated for the change in lumber values within the last decade. Post frame trusses are designed to be placed at spans greater than two feet on center.

Custom trusses up to 100 span. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. The same is true if we make it steeper. Here s a common truss design.

If we go any larger it will require more webbing inside the truss which will directly affect the cost of the truss. These allowable spans are based on nds 91. 8 10 foot 1 10 foot 1. Spread web storage trusses are engineered to have a small area to allow storage within.

If the overhang extends beyond 24 inches say to 30 inches then a 2 6 top chord for the tail section will be required to handle the additional overhang. The typical overhang for residential is between 16 inches and 24 inches. When making a selection below to narrow your results down each selection made will reload the page to display the desired results. Span also known as gable width this is based on the total footprint of the house and refers to the distance between two exterior walls.

This 26 span truss with a 4 12 roof pitch is the most economical truss we can build. Again this length can be adjusted to fit the need of the truss. Over 51 sizes styles in stock. Shop roof trusses spacer floor truss.

Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches.