Q8: A tripod stand rests on H.P. One of its legs A.P. is 140 mm long and it makes an angle of 750 with H.P. The other two legs BQ and CR are 150 mm and 160 mm long respectively. The upper ends of all the three legs A, B, and C are attached to a horizontal circular plate of 60 mm diameter. The attachment is done to the circumference of the circle dividing it equally.
In plan, three legs appear as radial lines 400 apart with a plan of the legs appearing perpendicular to V.P. Draw the projections of the complete tripod stand and find an angle of the other two legs with H.P. Also find the height of the horizontal circular plate from H.P.
Solution: AP = 140 mm
BQ = 150 mm
CR = 160 mm
Here, pa PA1
cr = cr1
bq = bq1
By measurement
h= 136 mm
Alpha = 660
Beta = 580
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