STUPIDSID
1
A simply supported two way slab is supported on all the sides by a 230 mm thick wall. The dimensions of the two-way slab is 4.5m × 5.5m (clear). Following are the details of reinforcement.
Draw to suitable scale:
a) Plan showing reinforcement details.
ii) c/s at midspan along shorter span.
iii) c/s at midspan along longer span.
Draw to suitable scale:
| i) | Thickness of slab | =150 mm |
| ii) | Along short span | = #12@ 130 mm c/c |
| iii) | Along longer span | = #10@ 110 mm c/c |
| iv) | Negative steel for shorter span | = #12@ 260 mm c/c 1.20 m long |
| v) | Negative steel for longer span | = #10@ 220 mm c/c 1.430 m long |
| vi) | Alternative rods are bent up cranked | |
| vii) | Corner mats are #10@ 120mm c/c at top and bottom, in two layers on all the corners for a distance of 0.950 m on either side | |
| viii) | Use M20 grade concrete and Fe415 grade steel | |
a) Plan showing reinforcement details.
ii) c/s at midspan along shorter span.
iii) c/s at midspan along longer span.
20 M
2
A RCC doglegged staircase has the following details:
Two landing beams of size 230mm&tims;250mm are provided with 2-#12 at bottom and top Stirrups are #8@200 c/c throughout.
Draw to a suitable scale:
a) Plan
b) Sectional elevation along second flight
c) Bar bending schedule.
| i) | Staircase hall size (clear) | =2.3m × 4.7m |
| ii) | Floor to floor height | = 3.3 m |
| iii) | Rise - 150 mm and tread | = 250 mm |
| iv) | Waist slab thickness | = 150 mm |
| v) | Width of stair | = 1.10m |
| vi) | Bearing | = 230 mm |
| vii) | Number of steps per flight | = 10 |
| viii) | Main steel | =#12@ 250 mm c/c |
| ix) | Distribution steel | = #8@ 275 mm c/c |
Two landing beams of size 230mm&tims;250mm are provided with 2-#12 at bottom and top Stirrups are #8@200 c/c throughout.
Draw to a suitable scale:
a) Plan
b) Sectional elevation along second flight
c) Bar bending schedule.
20 M
3
A rectangular RCC column and footing has the following details:
Details of reinforcement
Draw to suitable scale, the following:
a) Sectional plan of column and footing
b) Sectional elevation of column and footing
c) Prepare bar bending schedule for footing steel and column steel up to 1m above GL.
| Column size | = 400mm × 600mm |
| Size of footing | = 2m × 3m of uniform thickness 420 mm |
| Depth of foundation below GL | = 1m |
| Height of column to be shown above GL | =1 m |
Details of reinforcement
| Column | :8-#16 as main bars with #8@ 150 mm c/c lateral ties |
| Footing: along length | :#12@ 130 mm c/c |
| Along width (central band) | :#12@ 220 mm c/c |
| Use M20 concrete and Fe415 steel | |
Draw to suitable scale, the following:
a) Sectional plan of column and footing
b) Sectional elevation of column and footing
c) Prepare bar bending schedule for footing steel and column steel up to 1m above GL.
20 M
4
Design a slab and beam type combined rectangular footing for two columns located 4.0 m apart. The columns 300mm × 300mm and 500mm × 500mm in size carry axial service loads of 600 kN respectively. The property line is 0.5 m from the centre line of first column. Safe bearing capacity of soil is 150 kN/m2. Use M20 concrete and Fe415 grade steel.
Draw to a suitable scale:
i) Longitudinal section of the footing.
ii) Cross section of the footing.
Draw to a suitable scale:
i) Longitudinal section of the footing.
ii) Cross section of the footing.
60 M
5 (a)
Design a RCC portal frame an effective span of 8.0 m and effective height of 4.0m. The portals are spaced at 3.5 m c/c. The imposed load on slab is 2.0 kN/m2. Assume SBC of soil as 200 kN/m2. The bases of columns are fixed. Use M20 concrete and Fe415 steel. Design the continuous slab, portal frame and foundation.
40 M
5 (b)
Draw to a suitable scale the sectional elevation of half the portal frame showing the details of steel in beam, column and footing. Also show the cross-sectional details of beam at midspan and support and the sectional details of column.
20 M
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