To Obtain the Actual Strength of Flange is Tons.

To Obtain the Actual Strength of Flange is Tons.

Multiply the safe uniform load (U) by the effective width of flange, that is, the total width of either flange, less the greatest number of rivet holes coming on any line drawn across the top of flange, and at right angles to same (usually two rivet holes).

Never use less than one-quarter inch thick plates.

For Steel Flanges.

Add one-quarter to safe load on iron flange, hut length of span (in feet) must not exceed twice the depth (in inches) or deflection will be too great for plastering.