Net Torque On A Beam
Beam torque shows the turning effect around a chosen point. In construction checks, that point may be a support, hinge, bracket, or lifting lug. A load creates torque when its line of action is away from the point. The longer the lever arm, the larger the turning effect.
Why Net Torque Matters
Net torque helps you see whether a beam tends to rotate clockwise or counterclockwise. A balanced beam has moments that cancel. An unbalanced beam needs a reaction, restraint, counterweight, or connection capacity. This calculator is useful for quick site reviews. It is not a replacement for a stamped design.
Main Inputs
Enter the beam length and the reference point. Then add point forces, distributed loads, and applied moments. Force angle is measured from the beam axis. Upward force components are positive. Downward components are negative. A distributed load is converted into one equivalent force at its centroid. That keeps the calculation clear and traceable.
Reading The Result
A positive net torque means counterclockwise rotation by the selected convention. A negative value means clockwise rotation. The absolute value gives the design demand around the reference point. The report also shows total vertical force and a resultant location when possible. These values help compare load cases and field assumptions.
Construction Use
Use consistent units. Check the actual load path before trusting any number. Include temporary loads from workers, formwork, equipment, wet concrete, stored materials, and wind. Verify whether the connection resists moment or acts like a pin. A pinned support cannot safely carry large bending restraint unless detailed for it.
Good Practice
Run more than one case. Test maximum loads near each end. Try the lift point, support face, and bolt group center as reference points. Save the CSV for spreadsheets. Save the PDF for a simple record. For final work, compare results with the project code, material strength, deflection limits, and a qualified engineer's review.
Limitations
The calculator assumes planar loading on a straight beam. It does not check shear, bending stress, buckling, bearing, welds, bolts, or serviceability. It also ignores dynamic effects unless you enter them as equivalent forces. Use conservative load factors when conditions are uncertain, temporary, moving, eccentric, or poorly measured.