I would like to place some tiedown points on a trailer bed to secure small loads (80Kg) within a compartment. What sort of G forces could I expect in say a 30mph crash.
Is 5G a reasonable figure at this speed?
Thanks
Well, that's the problem. The peak acceleration of the structure is 80g, seatbelts are designed NOT to transmit that to the passenger, otherwise we might as well use cheesewire, and provide a handy box to take the body parts home in. That's why they stretch.
Given the mass of your parts I suggest that using passenger restraints is appropriate, try searching for R14 for anchorage tests and FMV 208 for passenger crash tests.
Since your trailer is exposed to sunlight watch UV degradation of the webbing.
Cheers
Greg Locock
SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.
The passenger compartments of most vehicles have stricter derived requirements. Truck beds do not. MIL-STD-810 Method 513, Procedure III "Crash Safety" lists cargo at 20 g's. Method 516, Procedure V "Crash Hazard" lists ground equipment at a peak of about 75 g's.