Road structure – process – or apparatus – Pavement – Modules or blocks
Patent
1983-10-31
1986-07-15
Leppink, James A.
Road structure, process, or apparatus
Pavement
Modules or blocks
404 41, 404 46, 52536, 52538, E01C 514
Patent
active
046003371
ABSTRACT:
A system of prefabricated board mats for assembling plank roads for supporting heavy equipment on unprepared surfaces. The system is based on a standard eight foot by sixteen foot three-ply treated lumber prefabricated board road section. Individual board mat sections are linked in the direction of travel using a mating male and female plug and socket system to evenly transfer the weight load of heavy equipment in the direction of travel. Angle iron interlocks are provided laterally at the corners. The mats are lifted by use of three or more eyebolts countersunk into the top of the mat at strategic locations so that balance is maintained.
In practice a porous protector filter cloth section is laid on an area where a board mat is to be placed. The individual board mat sections are laid successively from an initial prepared position by rolling out the protective cloth, lifting the individual sections by crane or the like, dropping the section into position, linking them transversely through the lateral connections. The installation machinery and the supply truck containing the individual board mat sections then proceed forward onto the section of boards laid and install a second section. Each successive section is longitudinally linked by installing a male plug end into an exposed female end which is at the outer edge as the normal laying process proceeds. This direction facilitates successive installation by machinery of the board mats.
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Leppink James A.
Smith Matthew
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