Patent ID: 7431129

Claim:
A composite scaffolding plank comprising: a plurality of wooden boards each having a fiber bending value of at least 2200 psi, a modulus of elasticity in the range of 1.6×10 6 to 1.8×10 6 , a lengthwise direction, two opposing sides being flat and extending parallel to said lengthwise direction, each of said sides having a height, said height being the smallest dimension of said wooden boards; said plurality of wooden boards positioned in side to side parallel abutment; at least three bores extending through said plurality of wooden boards; at least three spaced helical pins extending transversely through and imbedded in said bores in said plurality of wooden boards, said plurality of wooden boards being under compression, normal to said wooden board sides and normal to said lengthwise direction; and said plurality of wooden boards being held together in compression by said helical pins.