Check Capacity of WF Beam at Opening Based on AISC 360-05 Leave a Comment / Civil Books Platform, Excel Spreadsheets Engineering / By admin Measure the span of the slab, which is supported by a beam. Measure the span of the beam. Estimate the live load on the slab based on the function of the building. … Calculate the self-weight of the slab. … Transfer loads from the slab to the beam.