Barn Style Gambrel Roof Truss Calculator

Our roof truss calculator can be used to aid you in the purchase of your trusses by determining the quantity of trusses and lineal feet required.

Barn style gambrel roof truss calculator.

The gambrel truss is a kind of a supportive structure used in the roof design. Draw a semi circle on the graph paper mark a center peak at the top and draw two lines on each side in the shape desired for the gambrel roof. Rise 12 enter the coverage of one pack. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a gambrel roof. The lower slope length is measured from outside wall to the start of the upper sloped roof section. Build gable roof trusses 3 12 pitch. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.

The main purpose of the truss is to provide the support to the roof transferring the weight of the roof onto the walls of the structure. The length measured from the outside of the wall to where the upper slope from the gambrel roof starts. Build barn style gambrel roof trusses. It is convenient to use the software as gambrel roof truss calculator.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon. Build gable roof trusses 6 12 12 12 pitch. Frame roof no overhang.

Use the protractor to measure those angles at the peak the walls and the point where the two lines intersect on the top side of the roof. Calculate gambrel angles with graph paper and a protractor. Gable raised center aisle monitor gambrel salt shed mono slope. Square feet enter a waste factor.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Enter the pitch of the upper roof rise 12 enter the pitch of the lower roof. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Connector plates are generally 16 gauge to 20 gauge depending on truss design requirements.