Steel Bowstring Roof Truss

All american made engineered agricultural gable trusses 4 12 pitch heavy duty 2 angled steel painted black.

Steel bowstring roof truss.

94 and 95 are known as bowstring trusses the usual type of the bowstring truss is that shown by fig. Although the trusses shown by figs. Bowstring trusses were a popular solution for structurally supporting roofs from the 1900s through the 1950s especially in buildings where large open spans were desired manufacturing facilities garages warehouses among others. Buildings built with bowstring truss roof structures have a number of other factors that can make them susceptible to collapse.

The design helps reduce glare from the sun and let in natural lighting. All trusses come with necessary nuts and bolts to assemble. 12 50 a foot up to 20 14 95 a foot over 20 we stock 24 30 and 40 gable trusses and 12 lean to trusses. Curved steel sections angles beams bars channels pipe and tube often form the arched sections of bowstring trusses.

In light roof trusses entirely bolted connections are less favoured than welded connections due to the requirement for gusset plates and their increased fabrication costs. Several beams make up the arch while the roof outside is made up of metal sheets or other materials. In this truss all of the members except the upper chord are in tension and the strains in the bracing are comparatively slight thus making it a very economical truss for steel construction. One of the common long span trusses for roof support is the bowstring truss photo 1 above.

The steep side usually faces north or north east. In the case of large roof trusses which cannot be transported whole welded sub assemblies are delivered to site and are either bolted or welded together on site. All trusses come with a 1 overhang. You see this type of steel roof truss in the shape of a triangle.

Curved steel roof trusses curved roofs take many forms. All come with 16 overhang past post. Roof trusses are on a 4 12 pitch and lean to trusses are on a 2 12 pitch. 12 50 a foot 12 40 14 95 a foot 42 60 all lean to shed trusses 1 12 pitch.

For trusses having a span of 75 feet or less the suspending pieces should be radials but in trusses of larger spans they may be vertical as in fig. Custom overhang and pitches are available for additional charges shown below. This type of truss has a straight flat bottom chord that makes attachment of a ceiling simple. For example bowstring trusses can be constructed of wood or steel.