Parts of truss

What is a truss?

[Tecknical Definition] A truss is a structural system composed of members designed to resist only axial loads (tension or compression).

Basically, they are triangular wooden structures designed to provide support and strength to a roof.

Terms generally used:

TOP CHORD - An inclined or horizontal member that establishes the upper edge of a truss.

BOTTOM CHORD - A horizontal or inclined (scissors truss) member that establishes the lower edge of a truss.

WEBS - Members that join the top and bottom chords to form the triangular patterns.

SPLICE (top and bottom chord splice) - The point at which two chord members are joined together to form a single member. It may occur between panel points or at a panel point

PANEL LENGTH - The centerline distance between joints measured along the chords.

PANEL POINT - The point of intersection where a web (or webs) meets a chord.

OVERHANG - The extension of the top chord of a truss beyond the bearing support.

SLOPE (Pitch) - The inches of vertical rise in 12 inches of horizontal run for inclined members, generally expressed as 3/12, 4/12, 6/12, etc

HEEL HEIGHT - The vertical distance from the top plate to the underside of the roof sheathing measured at the outside wall.

CLB - A continuous lateral brace acts as a stiffener to a web or chord member in compression and is usually attached in the field

• Now lets have a look at some of truss shapes

HOME

TECK BLOG

TECK TALK