It's all about leverage. The Happijac Frame Mount Tiedown System uses leverage to your advantage in order to safely reduce the forces on your truck while controlling camper movement in all directions. Happijac's patented design creates a horizontal, I-Beam truss structure with your truck frame. This allows important counter balances against the pulling weight of the camper, which, due to properly applied principles of leverage in Happijac's tiedown design, are reduced to 1/5th the original force against the truck frame. The placement of Happijac’s tiedown anchor points together with the use of Happijac turnbuckles creates structural strength by triangulating leveraged counter forces. This configuration provides total control of the front-back, up-down, and side-to-side movements as well as the yaw, pitch and roll of the camper on the road without risking damage to your truck or camper.
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Other tiedowns actually multiply dangerous forces against your truck and camper. These typical designs are positioned to literally act as a crowbar between your truck bed and frame. On the road, this means that with other tiedowns, the modern truck mounted camper (weighing up to 6,000 lbs.) can create an approximately of 100,000 lbs. of leveraged upward pressure between your truck bed and the frame it is attached to, and 20,000 lbs. of sideways-pulling pressure on the frame its self. This does not take into account the sudden popping and jerking forces of similar magnitude that occur on both the truck and camper as the camper twists and moves with tiedowns designed to merely hold the camper down and keep it in the truck.
