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A masonry retaining wall, vertical and rectangular, supports a bank of 12 h; height 18 feet; angle of repose of earth 24° ; masonry 140 and hwork 120 lbs. per cubic foot ; sin 24° = '4.
; ind ratio of horizontal and vertical intensities of earth pressure ; intenis at base of wall ; amount of horizontal pressure on one foot length of 1, and moment of that pressure referred to base of wall; and
Find thickness of wall necessary for stability of position, taking 12 tre of pressure at :3t from centre of wall ; and show how the masonry this wall may be reduced without impairing its stability of position. 7. Taking the coefficient of friction for masonry as •6, find whether 12 e two walls of No. 8, built with courses horizontal, have stability of iction; and if not, how may this be obtained.
THURSDAY, 21st NOVEMBER.
(2 P.M. TO 5 P.M.]
SPECIFICATION AND ESTIMATING. 1. The accompanying drawing represents a small rest-house ; stone walls; 50 iled roof: stone floor.
[ See the Drawings facing this page.]
Take out quantities of all kinds of work in the building in the form of an estimate and fill in price for each kind of work in Poona.
N.B.-Details of woodwork of trusses, and multiplications of dimensions
need not be given.
2. Give short specifications for the following items of work in a bungalow to be erected in Poona ; and give proportions, dimensions, and quality of materials to be used :
(a) Excavating foundation tranches and filling them with concrete. 12
Depth of founds 10 feet in black soil which will not stand
vertical. (6) First class brick arches over doors. (c) First class panelled doors 7' x 4'; noting thickness of frames, 8
number of panels, fixtures, and fastenings. (d) Double-tiled roofing-making notes about tiles, trusses, battens, 12
rafters, ceiling, wood work, iron work; the usual distances
between trusses, rafters, battens should be stated. (e) Wooden staircase 4 feet wide, giving names and dimensions of 12
the parts, and good proportions for width of tread and rise of steps.