Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 364
Fig. 52. Plan of Bottom Partof Bullnose Stair Pig. 53. Vertical Section throughBottom Part of Bullnose Stair. Only the central carriage timbers are shown in Fig. 54; but in astair of this width, there ought to be two other timbers, not so heavy,perhaps, as the central one, yet strong enough to be…
Architecture · Building
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