Hollow-core plastic structural lumber alternative

Details Hollow-core plastic structural lumber alternative Hollow-core plastic structural lumber alternative

1996-04-04

1998-07-21

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Longitudinal or transverse tubular cavity or cell

428178, 428166, 527901, 5279211, 264167, 26417717, 2642091, 2642093, 2642401, B32B 320, F04C 254, D01D 520

Patent

active

057832862

ABSTRACT:
A structural lumber alternative made of thermoplastic material has a generally hollow cross section, with a thick outer shell enclosing a central opening and at least one internal web disposed in the central opening and joining the outer shell. The internal web is a non-extruded unitary web of the same material forming the outer shell and is formed into position from the outer shell after the extruded outer shell leaves the extrusion device.

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