Machine Stress Rated MSR Evaluated MEL Lumber

Reference data and engineering information about machine stress rated msr evaluated mel lumber for material properties applications.

machinestressratedMSRCalculator

Overview

Engineering reference data for Machine Stress Rated MSR Evaluated MEL Lumber in material science and properties.

$\sigma = \frac{F}{A}$

Force per unit area.

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Symbol	Description	Unit
$\sigma$	Stress	Pa
$\varepsilon$	Strain	—
$E$	Young's modulus	Pa
$\alpha$	Thermal expansion coefficient	1/°C
$\Delta T$	Temperature change	°C

MSR (Machine Stress Rated) and MEL (Machine Evaluated Lumber) grades with their allowable design values.

11 rows

Allowable Design Values for MSR (Machine Stress Rated) Lumber.
Grade Name	Fb(psi)	E(×10⁶ psi)	Ft(psi)	Fc(psi)
1350f-1.3E	1350	1.3	750	1600
1450f-1.3E	1450	1.3	800	1625
1650f-1.5E	1650	1.5	1020	1700
1800f-1.6E	1800	1.6	1175	1750
1950f-1.7E	1950	1.7	1375	1800
2100f-1.8E	2100	1.8	1575	1875
2250f-1.9E	2250	1.9	1750	1925
2400f-2.0E	2400	2	1925	1975
2550f-2.1E	2550	2.1	2050	2025
2700f-2.2E	2700	2.2	2150	2100
2850f-2.3E	2850	2.3	2300	2150

Source: engineeringtoolbox.com

7 rows

Allowable Design Values for MEL (Machine Evaluated Lumber).
Grade Name	Fb(psi)	E(×10⁶ psi)	Ft(psi)	Fc(psi)
M-10	1400	1.2	800	1600
M-11	1550	1.5	850	1675
M-14	1800	1.7	1000	1750
M-19	2000	1.6	1300	1825
M-21	2300	1.9	1400	1950
M-23	2400	1.8	1900	1975
M-24	2700	1.9	1800	2100

Source: engineeringtoolbox.com