ABSTRACT

Typical sizes for a sturdy stool are given in the illustrations, showing the top as ex. 100 50 mm, legs ex. 75 50 mm, end-cleats 6, 9 or 12 mm plywood or MDF board.

5.1.3 Angles of Legs The angles of the legs are not critical to a degree and are usually based on the safe angle-of-lean used on ladders, which is to a ratio of 4 in 1 (4:1). This refers to a slope or gradient measured by a vertical rise of four units over a horizontal distance of one unit. This ratio works out to give approximately 76.