LADDER ASSEMBLY FORMED FROM INTEGRAL MATERIAL BLANK

摘要

A ladder is formed from an integral material blank having a pair of opposed side portions integrally joined to a central portion disposed between the side portions. The central portion includes a number of step portions spaced from one another along the length of the side portions. Each step portion includes a front edge integrally formed with the side sections and a step surface integrally formed with the front edge. The front edge of each step portion is joined to each of the pair of side portions and o the step surface along a pivot line that enables the side portions and the step surface to be manually bent with regard to the front edge when assembling the ladder assembly from the material blank.