Lawrence David does a two day jig
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• Bodybuilder, Lawrence David of Peterborough, says that the variable dimension jig system which it introduced last year has trebled its factory's production capacity, and given it the ability to now body a truck in two days instead of about five.
Many leading bodybuilders, including Boalloy and Southfields have recently introduced jig-building systems. Lawrence David says its system goes beyond the requirements of British Standard 5750 on bodybuilding quality.
Much of the time saving comes from a simplification of the body mounting. Each cross bearer has sliding captive clamp bolts, the positioning of which can be varied to suit exactly the width of the chassis. this makes it possible for the body to be built independent from the chassis, and even stored for future fitment if required.
A standardised form of Zsection steel sub-frame has been designed by Lawrence David. Whatever the width of the sub-frame and whatever its shape in plan, the body simply clamps to the flanges of the Z-section longitudinals.
While the steel sub-frame is relatively heavy, it does help to give a chassis increased load bearing strength, and makes it feasible for bodies, or even body types, to be swopped at a later date.