Section A
Q1.
(a) Briefly discuss the compressive strength and tensile strength properties of timber for the use of timber as a structural element of a building.
(b) What are the advantages of partition walls in a building? What are the requirements of a good partition wall?
(c) A 3.0 km section of the highway between two points A and B on the ground appears on an aerial photograph which was taken with a camera of focal length 15.0 mm. The photo-coordinates of point A are (20.5, 15.5) mm and point B are (-15.5, -20.5) mm with their ground height as 250 m and 210 m above mean sea level, respectively. Compute the flying height of the aircraft above mean sea level.
(d) A curve of 600 m radius on a BG section has a limited transition of 50 m length. If the Maximum Sectional Speed (MSS) is 100 kmph, compute the maximum permissible speed and superelevation. Assume actual cant is equal to cant deficiency permitted at maximum speed.
(e) Determine the spacing between contraction joints for 4.0 m slab width having a thickness of 25 cm and f = 1.5, for (i) Plain Cement Concrete; allowable Sc = 0.8 kg/cm^2, and (ii) Reinforced Cement Concrete 1.0 cm dia bars at 0.30 m spacing. Assume unit weight of cement concrete W = 2400 kg/m^3, and allowable tensile stress in steel = 1400 kg/cm^2.