Roofing · Truss layout budgeting
Set the spacing. Count truss positions.
Convert a straight building length and on-center spacing into end and interior positions, spare allowance, and a preliminary vendor, delivery, and crane budget.
← Building length →↕ Building span← Truss spacing →
← Building span →Gable-end truss
1 Enter the building layout
2 Enter preliminary vendor costs
Results update automatically · obtain an engineered truss placement diagram from the supplier
Transparent quantity
Ceiling-divided bays plus both end positions.
The building length is divided into no-wider-than-entered spacing bays, then one position is added. Spares and costs remain visible and editable.
For field-built common-rafter geometry, use the rafter-length calculator.