Roof Truss Fink

The fink truss is a commonly used truss in residential homes and bridge architecture.

Roof truss fink. Calculate the tension and compression forces on each member given the load requirements below. A fink roof truss is traditionally the most commonly used truss type providing a simple adaptable and cost efficient roofing solution. 2 grade of douglas fir and maximum span floor joists imperial units. As we will see below there are several different types of designs and this will impact the angles and designs of the overall truss.

It originated as a bridge truss although its current use in bridges is rare. The chord size and web configuration are determined by span load and spacing. A pitch truss with a sloping or non sloping vertical interior ceiling detail. Unbalanced roof live loads have been considered for this design.

1 grade yellow pine. In a fink truss the internal joists are arranged in a w shape ensuring even weight distribution from one end to the other. The web members form a w to provide a high strength structure with good load carrying capacity. Modulus of rigidity shear modulus modulus of rigidity is the elasticity coefficient for shearing or torsion force.

The fink is a basic webbed truss design that provides the most economical roof solution. It is most often used for roof construction. Residential roof trusses manufactured with no. Trusses are professionally designed with state of the art computer programs.

The lumber components are precision cut and assembled together with galvanized steel truss plates in a factory controlled environment. Some common trusses are named according to their web configuration such as the king post fan or fink truss. Fink trusses were originally invented for the purpose of beefing up bridges but many contractors now use them to increase the strength of interior structures. Each truss is responsible for a 2 foot section through the roof as trusses are typically placed 24 apart and thus must carry 12 on either side.

Maximum floor joist span no. Residential trusses save time and materials compared to conventional hand framing. The truss is a framework consisting of rafters posts and struts which supports your roof. This type of truss is perfect for the dining room living room great room and kitchen.

Designed in accordance with the 2015 international residential code sections r502 11 1 and r802 10 2 and referenced standard ansi tpi 1. Horizontal roof rafters maximum span douglas fir in horizontal roof rafters and maximum span.