Triangular Roof Truss Design

Apr 25 2019 explore robert heimbigner s board roof truss design followed by 984 people on pinterest.

Triangular roof truss design.

It can be said in the case of steel roof truss design calculations that the cost of truss should be equal to twice the cost of purlins and the cost incurred on the roof covering. Some common trusses are named according to their web configuration such as the king post fan fink or howe truss. The pitched or common truss is characterized by its triangular shape. The chord size and web configuration are determined by span load and spacing.

Typically the upper chords have different lengths in this particular type of truss that make the apex off center. Its conventional triangular truss design is that the two sides are sloping up to the apex above with the struts known as the upper chords leading down from it. These are attached to the horizontal beam thus making up the triangle s base. Basic types of stresses loads and roof truss design diagram 1 shows a basic triangular roof with two top chords called rafters in a conventional roof and a bottom chord or ceiling joist.

It s often used for sheds garages or extension of an existing roof. A mono truss roof allows for more sunlight and visual space proper drainage and relatively cheaper. Parallel trusses are used for deep roofs whereas triangular are usually employed in the trusses with steep pitches. When the roof is subjected to a load the top chords are put under bending and compression forces and transmit the roof loads down to the supports.