How do you calculate reinforced concrete slab?
For the investigated conditions the reinforcement should be placed in the lower section of the slab: in this case the amount of reinforcement per 1 m3 of concrete will be 20 kg. When it is placed in the middle of the section its amount will be 30 kg/m3 of concrete, i.e., 1.5 times more.
How is slab design calculated?
Effective depth d= Span /((L/d)Basic x modification factor) For obtaining modification factor, the percentage of steel for slab can be assumed from 0.2 to 0.5%. The effective depth d of two way slabs can also be assumed using cl. 24.1,IS 456 provided short span is <3.5m and loading class is <3.5KN/m.
How do you design a slab thickness?
Standards like ACI 318 have specified the minimum thickness of the slab based on the span of the slab.
- Simply Supported Slab = Span / 20.
- One End Continuous Slab = Span / 24.
- Both End Continuous Slab = Span / 28.
- Cantiliver = Span / 10.
How do you choose reinforcement of a slab?
Thickness of the slab is decided based on span to depth ratio specified in IS456-2000. Minimum reinforcement is 0.12% for HYSD bars and 0.15% for mild steel bars. The diameter of bar generally used in slabs are: 6 mm, 8 mm, 10 mm, 12mm and 16mm.
What is K in slab design?
Variable Load on slab The floor slab (PANEL 1) is spanning in two directions, since the ratio (k) of the longer side (ly) to the shorter side (lx) is less than 2.
What are the types of RCC slabs?
A reinforced concrete slab is a crucial structural element and is used to provide flat surfaces(floors and ceilings) in buildings….
- One-Way Slabs on Beams.
- One-way joist slab (Ribbed slab)
- Waffle Slab (Grid slab)
- Flat Plates.
- Flat Slabs.
- Two-way Slabs on Beams.
- Hollow core slab.
- Hardy Slab.
What is the standard thickness of slab?
In general, 6 inch (150mm) slab thickness is considered for residential and commercial buildings with reinforcement details as per design. Methods used for finding slab thickness varies for different types of slabs.
What is the size of RCC slab?
In a residential building it is 9 ʺ × 12 ʺ or 225 mm × 300 mm standard size according to (IS codes). The minimum RCC beam size should not be less than 9 ʺ × 9 ʺ or 225mm × 225mm with the addition of a 125mm slab thickness.
What is the minimum reinforcement in slab?
Minimum reinforcement is 0.12% for HYSD bars and 0.15% for mild steel bars. The diameter of bar generally used in slabs are: 6 mm, 8 mm, 10 mm, 12mm and 16mm. The maximum diameter of bar used in slab should not exceed 1/8 of the total thickness of slab.
What is an RC slab?
Reinforced concrete (R.C.) slabs are plate elements used to form the floors of buildings. In a typical reinforced concrete building, reinforcement bars arranged as mats are incorporated into a concrete plate of minimum thickness 125 mm to form a reinforced concrete solid slab.
What is minimum thickness of RCC slab?
The minimum thickness of the RCC slab is 4″ or 100mm, 3″ for sidewalk, 4″ for patios, 6″ for driveway, and minimum 4″ thick for parking. It will be restricted to 4 times the nominal size of aggregate.