Elementary principles of carpentry ... : ; to which is added an essay on the nature and properies of timber
A carpentry treatise by Thomas Tredgold, with additions by Peter Barlow, published in London by John Weale in 1840 for builders and carpenters learning timber construction. Its plates are rotated engineering drawings of roof trusses, arched timber ribs and bridge frames, drawn in line with dimension lines and joint details; a designer could take from them the clean geometric logic of braced triangulated structures and the crisp hatching used to show timber sections.
