The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 239
s,as in fig. 3, and it was found, that when they were placed inclined to eachother at an angle of 45°, the thickness must be -1404 of the length to con-tain the curve, and that the point of contact was -3535 of the length, fromthe upper extremity ; also, that whether the inclination was greater or… … Kg. *■pieces of wood of this form, and dividing them where the curve touches theextradosal line at a, they will yield by the apex going upwards, wheuplaced at 45°; but when the angle of inclination is made greater or lessthan 45° as in fig. 4, stability is obtained ; and at the inclination of 45°,…
Architecture · Civil engineering · Science
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