I need the rebar specification and diagrams for a suspended concrete slab, as part of a two-storey building. The slab is around 50 square metres, for a restaurant, and is of irregular shape.
The slab is supported by 11 concrete piers, of which 10 are 30cmx30cm square, and one is 32cm diameter round, each reinforced with 10 16mm deformed steel bars.
I have stock of 16mm and 12mm deformed steel, but can also reinforced with normal steel, and with wire mesh, if the 16mm and 12mm are deemed excessive. However, I am not looking to use rebar of greater than 16mm diameter.
The piers will be 6.6 metres tall, with the slab suspended at 3.3 metres (a second slab will be suspended at 6.6 metres, but this job is only for the first slab). The intended load is light commercial - restaurant. The thickness of the slab is not yet determined, but we would prefer not to make it thicker than necessary.
The coordinates of the near corner of the piers are:
Column X Y Shape
A 0 0 Square
B 4.23 0 Square
C 8.3 0 Square
D 12.39 1.97 Square
E 10.55 5.46 Square
F 9.86 6.57 Square
G 9.33 10.26 Square
H 8.1 10.54 Square
I 8.3 2.18 Square
J 4.92 3.61 Round
K 1.21 3.62 Square
Please see the attached diagram of the slab. There is a 1.6 metre square hole in the slab at the top left corner, to fit a spiral staircase. The edge of the slab sits on top of the pillars, with the exception that there is a 1.5 metre cantilever that juts out between pillars A, B, C, and D.
The rebar for the slab should presumably be analysed using the strip method.
* rebar diagram for slab
* full rebar specification (length, bar type, direction, position), for each part of the slab.