Bolted Connections Calculator
Check the factored shear, bearing, tension, and combined resistance of a single high-strength structural bolt (ASTM F3125 A325M / A490M) to CSA S16.
Standards used on this page:CSA S16-19 Clause 13.12 · shear Vr = 0.60 φb n Ab Fu(×0.70 threads intercepted) · bearing Br = 3 φbr t d Fu· tension Tr = 0.75 φb Ab Fu ·
φb = φbr = 0.80.
Scope: a single bolt. Shear uses the gross (nominal) bolt area; bearing assumes
adequate end/edge distance and spacing (the 3φbr t d Fu form, not the
end-distance-limited value). Slip resistance (serviceability, Clause 13.12.2) and block shear are not
checked. The S16-19 bearing factor φbr = 0.80 is used (raised from 0.67 in pre-2009 editions),
so bearing values differ from older textbooks.
This calculator provides preliminary, indicative structural calculations only, intended to
assist with initial sizing and understanding. It is not a substitute for assessment by a
qualified structural engineer, and ca.cad-steel.com accepts no responsibility for its use
in any final design.