New Metal Worker Pattern Book e-bog

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Arch-es are usually semicircular (fig. Semi elliptical, segmental, pointed (fig. 7 7 )'or M'oresque (horse shoe) (fig. 7 in shape, according to the style of archi tecture with which they are used. The top of an opening may be perfectly level and yet composed of wedge shaped blocks So combined as to be self -supporting, in which case it is called a flat arch. (fig. 7 9)