Compact, quick assembly scaffold

Claim 1

A ladder unit for use in constructing a scaffold comprising: a. an outside vertical member having a top and a bottom end, said top end and said bottom end being rectangular in cross-section and hollow for receipt of a pin means therein for joining one of said ladder units vertically to another of said ladder units; b. an inside vertical member; c. pin means comprising a rigid elongated structure having two end portions adapted to be slidably and snugly received in said hollow top or bottom end of said outside vertical member, said end portions being rigidly connected to a center portion which is sufficiently large enough to prevent said center portion from sliding into said hollow ends of said outside vertical member; d. a series of horizontal two-ended step means rigidly connected at one end to said outside vertical member and at the other end to said inside vertical member, the steps located at said top end and said bottom end of said outside vertical member being rectangular in cross-section and hollow at said end which is connected to said inside vertical member for receipt of horizontal joining means for joining two of said ladder units side by side; and e. horizontal joining means comprising a rigid elongated structure having two end portions adapted to be slidably and snugly received in said hollow ends of said step means at the top or bottom end of said outside vertical member, said two end portions being rigidly connected to an elongated center portion which is sufficiently large enough to prevent said center portion from sliding into said hollow ends of said outside vertical member and sufficiently long enough to achieve the desired horizontal spacing between two connected side-by-side ladder units.