## 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, C_{d} – NDS 2015, Section 4.3.2

Wet Service Condition Factor, C_{m} – NDS 2015, Section 4.3.3

Temperature Factor, C_{t} – NDS 2015, Section 4.3.4

Beam Stability Factor, C_{L} – NDS 2015, Section 4.3.5

Size Factor, C_{F} – NDS 2015, Section 4.3.6

Flat Use Factor, C_{fu} – NDS 2015, Section 4.3.7

Incising Factor, C_{i} – NDS 2015, Section 4.3.8

Repetitive Member Factor, C_{r} – NDS 2015, Section 4.3.9

Reference Tension Stress Parallel to Grain, F_{t} – NDS Supplement 2015

Reference Bending Stress, F_{b} – NDS Supplement 2015

## Output Parameters

Section Modulus, Sx

Actual Tensile Stress, f_{t}

Actual Bending Stress, fb

Allowable Tension Stress Parallel to Grain, F’_{t }– NDS 2015, Table 4.3.1

Allowable Bending Stress without Stability Factor, F_{b}* – NDS 2015, Section 3.9.1

Allowable Bending Stress with Stability Factor, F_{b}** – 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