Hasluck, Paul N. (Paul Nooncree), 1854-1931 · London ; New York : Cassell and Co. · leaf 111
plate of the style known as “chequered,” for placing over an opening such as a valve-pit, manhole, etc, may be drawn. The chequers, or raised pieces, are to prevent slipping, and give a firm foothold when passing over it. In this case only one corner of the plate is shown on the drawing; the… … Fig. 177.—Chequered Plate. dimensions [show that the whole plate is 3 ft. 9in. by 2 ft. 11 in., and calculation will show that this will allow for six chequers in length and eight in width. Another method sometimes adopted is to show the outline of the whole plate to a small scale, with a few of…
Mechanical drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
