Calculator Description
This online engineering calculator computes the actual tensile and bending stresses and allowable tensile and bending stresses for a wood sawn lumber member in tension + bending according to the National Design Specification for Wood Construction 2015 (NDS 2015)
Calculator Link
Input Parameters
Tensile Force, P
Bending Moment, M
Member Width, b
Member Depth, d
Net Cross-Sectional Area, An
Load Duration Factor, Cd – NDS 2015, Section 4.3.2
Wet Service Condition Factor, Cm – NDS 2015, Section 4.3.3
Temperature Factor, Ct – NDS 2015, Section 4.3.4
Beam Stability Factor, CL – NDS 2015, Section 4.3.5
Size Factor, CF – NDS 2015, Section 4.3.6
Flat Use Factor, Cfu – NDS 2015, Section 4.3.7
Incising Factor, Ci – NDS 2015, Section 4.3.8
Repetitive Member Factor, Cr – NDS 2015, Section 4.3.9
Reference Tension Stress Parallel to Grain, Ft – NDS Supplement 2015
Reference Bending Stress, Fb – NDS Supplement 2015
Output Parameters
Section Modulus, Sx
Actual Tensile Stress, ft
Actual Bending Stress, fb
Allowable Tension Stress Parallel to Grain, F’t – NDS 2015, Table 4.3.1
Allowable Bending Stress without Stability Factor, Fb* – NDS 2015, Section 3.9.1
Allowable Bending Stress with Stability Factor, Fb** – NDS 2015, Section 3.9.1
Combined Tension and Bending Check – NDS 2015, Equation 3.9-1
Buckling on the Compression Face Check – NDS 2015, Equation 3.9-2