Rex J. Andrews Truck Load Restraint Calculator

Please enter in the values to be used in the calculation.
IMPORTANT: ANY UNITS CAN BE USED BUT THEY MUST REMAIN CONSISTENT THROUGHOUT ALL VALUES.

Loading Conditions

Load restraint based on Load Restraint Guide - Second Edition - 2004

NOTE: HIGH CENTRE OF GRAVITY LOADS OVERTURING MOMENT NOT CALCULATED

Direct restraint method with static friction used, no allowance for preload on restraint

Ignore restraint capacity forwards for blocked loads.

Ignore restraint capacity sideways for sideways blocked loads.

Table1. Restraint Capacities

Size Grade Capacity (T)
Strap
50 AS4380 Blue 2
75 AS4380 Blue 5
Chain
6 G70 2.3
8 G70 4
10 G70 6
13 G70 9

Table2. Typical Static Friction Co-efficients

LOAD SURFACE CO-EFFICENT
Free Wheeled Vehicle (brakes not on all axles) 0
Wet or Greasy Steel on Steel 0.01 - 0.1
Smooth Steel on Smooth Steel 0.1 - 0.2
Smooth Steel on Rusty Steel 0.2 - 0.4
Smooth Steel on Conveyor Belt 0.3 - 0.4
Smooth Steel on Rubber Load Mat 0.6 - 0.7
Rusty Steel on Rusty Steel 0.4 - 0.7
Rusty Steel on Timber 0.6 - 0.7
Load Description:
Calculation By:
Date:
Load Mass
Co-efficient of friction (Table2)
Rear restraint capacity (Per side, Table1)
R1
R2
R3
Front restraint capacity (Per side, Table1)
F1
F2
F3
Notes:
Load Restraint Diagram

Results

These Values MUST BE GREATER THAN These Values

Restraint Capacity Sideways: > Required Cap Sideways 0.5G
Restraint Capacity Rearwards: > Required Cap Rearwards 0.5G
Restraint Capacity Vertical: > Required Cap Vertical 0.2G
Restraint Capacity Forwards: > Required Cap Forwards 0.8G

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