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Prepare a centre line drawing showing foundation trench layout fox walls of the building and footing for columns as shown in Fig. Ql.
All columns C1 230mm x 450mm in
size Columns C2 300mm x 300mm in size.
Size of footing for C1 columns = 1.2m x 1.5m.
Size of footing for C2 columns = 1.0m x 1.0m.
Concrete bed for footing 100 mm thick, projecting 76mm beyond the footing
Width of foundation trench for walls = 900 mm
Width of trench for corridor basement = 750 mm
Also prepare the slab and beam layout wit suitable dimensions, notations and with appropriate grids. Use M20 grade concrete and Fe415 grade steel.
A rectangular R.C. Beam of cross-section 300mm x 450mm is supported on four columns spaced at 4 m centre to centre. The beam reinforcement consists of 4 bars of 16 mm dia at midspan out of which two bars are curtailed near each support at bottom (+ve reinforcement). The reinforcement at all supports consists of 4 bars of 16 mm diameter -ve reinforcement. The beam has 2 Nos 16 mm diameter hanger bars at top. Shear reinforcement consists of 8mm diameter 2 legged vertical stirrups at 150 mm c/c at 1 m from face of supports and at 230 mm c/c in the remaining span. Use M20 concrete and Fe 415 grade steel. Draw to a suitable scale.
(i) Longitudinal section of continuous beam
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