(2) (b) A simply supported reinforced concrete beam la constructed of
20 Mpa and Pe415 steel. It supports factored dead load' of 5
IcN/m and tinctored Live' load of 35 IN/m. Bending Moment
diagram, shear foce diagram and the cross section at maximum
bending moment are shown in Fig. 2(b). If two 20rhm diameter
bars are to be curtailed, find the actual point of curtoilment,
check developmert length and shcor capacity at point of cut off.
Also draw a neat (ketch of reinforcement detailing, 4+4+4+2
OLSI N/m, LL 35 kN/m
-7 m
000
2-25 mm
NO
2-20 mun
DOO
140 EN
-300-1
245 KN.
Fig. 2(b)

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c