Good morning all
I’ve been trying to search online and with a few coach builders to no avail.
My van has a 300kg gw sticker on my gantry it’s a crafter 3.5t dropside ingimex body.
I have to carry bundles of tube 6mtrs so use gantry with other end inside the vans back on bed
My question is how much tube can I put on gantry as if it’s a 300kg bundle is all the 300kg resting on gantry point or is it split across load to bed
Would that mean I could carry a bigger bundle than 300kg overall weight ?
Many thanks
In theory the height of gantry from body floor and distance between gantry and rear of body are required. That will only be a rough guide since the diameter of the bundle will affect the result in a manner which probably can’t be calculated if the rear end of the bundle is up against a tailboard. None of that will take into account the whip from the front overhang nor the force applied by the lashings and how far aft that is in relation to the gantry. Given that information you need to ask someone who does these calculations every day, or an A level physics student. It will be down to SOHCAHTOA.
Many thanks
I thought this tbh after checking
every load will have to be worked out individual
If the middle of the bundle is resting on the gantry, then all the weight of the bundle will bear through the gantry. (You can imagine it teetering on the point of balance).
If the extreme end of the bundle is resting on the gantry then about half of the weight of the bundle is bearing down onto the gantry. The other half of the weight will be through the floor at the tailboard.
That should be near enough in the real world.
The factor of safety calculated into the SWL should take account of the dynamic forces involved in braking etc. The engineers designing bodies and marking allowable loads shouldn`t expect drivers to get out calculators or slide rules when loading vehicles.
*I`m avoiding using “mass”, “normal reaction”, etc deliberately to make for a clear real-world answer.
Thanks also for the reply
I was under that impression in my head trying to think it through. as its around 4.5 mtrs point the bundle will rest on the gantry so thought it was around 40/50% of total bundle weight on gantry point