RAM Structural System Help

Deflections

A deflection section is presented at the end of the detailed beam design report. This section provides the camber (if required), along with the results of the deflection check for each deflection type on the beam. The results show the calculated deflection, effective moment of inertia, span-to-depth ratio and the controlling deflection ratio if a criteria is specified for the deflection type. An OK or a NG (No Good) will be shown at the end of the row if there is deflection criteria specified and the span is longer than minimum specified in the criteria. For beams with cantilevers the report will also indicate if the cantilever is the controlling span, otherwise the back-span should be assumed controlling.

Also displayed below this section are the moments used to calculate the effective moment of inertia (Ieff) for the controlling span. Note that these are the full Dead Load and Live Load moments from all skip load patterns that produced upwards and downwards deflections (see technical section for more information on the calculation of Ieff). Note that this section is not displayed if 'analysis of cracked section I values' is selected for the deflection calculations.