By Willibald Mannes (auth.)

ISBN-10: 1468466356

ISBN-13: 9781468466355

ISBN-10: 1468466372

ISBN-13: 9781468466379

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Additional info for Techniques of Staircase Construction: Technical and Design Instructions for Stairs Made of Wood, Steel, Conrete, and Natural Stone

Example text

Here we find intersections of lines from the pitch line of the wreath and the plumb lines on the string (1). With the help of the plan shape of the wreath (B), the opening of the elevation (C) can be drawn, with the string ramp (A) being divided by the number of radial lines. The intersections (4) easily provide the opening view (C), to which the length and width of the wood have to be added (5). The thickness of the wood (6) is indicated by the plan . Fig. (D) shows an oblique view of the glue-laminated wreath.

Bl). When tapering was carried out (B2), step 3 was almost exactly in the corner of the wall string. This was avoided in (C1) when the front edge of the first step was moved by about 15 cm (1). Since, in the new example, step 1 no longer forms part of the tapering arc, its depth (14 cm) should be determined first. The dimension of 14 cm was found empirically in example (B2) (2). The center point of the tapering arc (M) marks the intersection of the extended edges of steps 2 and 9. The method of tapering has already been described.

The number of steps and the fifteen points thus gained are connected horizontally with the line indicating the face string (2). These intersections (3) are connected with the points on the walking line. This completes the tapering process. If one compares the depth of steps 1 and 9, one finds that the result is satisfactory. The corner steps are advantageously placed in the wall-string comers (4). 0 N ;::; 4. 3. Kl ·91 II t® '" If) N ·SI 30 If) N N 2. If) N In example (B), the circular arc method has been used for a flight of stairs with a quarter turn in the lower section.

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Techniques of Staircase Construction: Technical and Design Instructions for Stairs Made of Wood, Steel, Conrete, and Natural Stone by Willibald Mannes (auth.)


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