Double Fink Roof Truss

Calculate the tension and compression forces on each member given the load requirements below.

Double fink roof truss. Double fink trusses are essentially fink trusses that repeat the pattern twice on either side. Double cantilever common trusses their spans king post span up to 16 queen post fan spans 10 to 22 fink w spans 16 to 33 howe k spans 24 to 36 fan double fan spans 30 to 36 modified queen multi panel spans 32 to 44 double fink ww spans 40 to 60 double howe kk spans 40 to 60. The zoarville station bridge consists of one of the original three spans of a through truss of fink design built in 1868 by smith latrobe and company of baltimore maryland. In a hip roof.

Click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to the compare list. Compare click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to the compare list. Neither bridge is in its original location. Calculate all angles and lengths necessary to build the truss.

A fink top a double fink middle and a fan truss. The fink truss can also be used as a support for other trusses by doubling or trebling the number of plies i e. Hip trusses are more complicated to frame than a some other trusses because of the added complication in framing the hips. If the most basic fink truss can be characterized by a double v then a double fink would look like a double w.

Double fink it s the fink truss with the same pattern repeated on both sides so that the web configuration looks like w instead of double v. The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions. Fan trusses are essentially fink trusses that have its web members fan out from the joints at the bottom usually the addition of vertical members. A roof truss is a very strong and stable frame that is made of wood and is held together with the help of metal connector plates.

These trusses provide support for the rafters and give the roof its rigidity. Roof live load 25 lb ft2 b. Only two fink truss bridges remain intact in the united states. Add to list click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to your list.

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. It is a relatively new design that has also been used to provide support and shape to bridges. Derivatives of the fink truss include the double fink and the fan truss types. Double w truss also known as a double fink truss can span more than 65 more 16 5m length than the possible span of a singular 10m fink truss.