Roof Truss Top Chord

Flat truss a truss which has the top chord parallel to the bottom chord over the entire length of the truss.

Roof truss top chord.

Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. 500 sycamore street p o. Bearing a structural support usually a wall that occurs at the top or bottom chord or between the end points of a roof or floor truss. Top chord bearing on frame wall top chord bearing on masonry wall top chord cut after installation intermediate bearing continuous floor truss special engineering required roof floor truss manual 7 31 08 10 43 am page 10.

The parallel chord truss or flat truss gets its name from its parallel top and bottom chords. Top chord an inclined or horizontal member that establishes the upper edge of a truss usually carrying compression and bearing stress. Truss a pre built structural member capable of supporting a load over a given span. It is often used for floor construction.

These steel joints are needed to support the overall truss. Closed in which the bottom chord is horizontal and at the foot of the truss and open in. Box 177 la crescent mn 55947 507 895 8400. Pitched truss any truss in which the top chord is sloped and the bottom chord is horizontal.

The more complex the truss framework is the greater quantity of these joints will be required. The top members of a truss are known generically as the top chord bottom members as the bottom chord and the interior members as webs in historic carpentry the top chords are often called rafters and the bottom chord is often referred to as a tie beam there are two main types of timber roof trusses. The cap truss is very similar to a gable truss with webs transferring loads vertically into the base truss below it. The bottom chord of the cap truss is typically moved up 1 1 2 for 2x4 continuous lateral restraints over the flat top chord of the base truss or the thickness of whatever material may be used 3 4 for plywood osb etc.

A combination of the two is a truncated truss used in hip roof construction. Use our top chord truss calculator to estimate your rake length for roof sheathing. Bending momenta measure of the bending effect on a member due to forces acting. A metal plate connected wood truss is a roof or floor truss whose wood members are connected with metal connector plates.

Web members that join the top and bottom chords to form triangular patterns that give truss action usually carrying tension or compression stresses. A truss consists of one or more triangles in its construction. Peak point on a truss where the sloped parts meet. Trusses to support roof covering.