What is the minimum reinforcement in footing?
What is the minimum reinforcement in footing?
Reinforcement in footings The minimum reinforcement in footing slab specified by the code is 0.12% and maximum spacing specified is 3 times the effective depth or 450mm whichever is less.
How thick should concrete footings be?
The depth of concrete you need will depend on the use: footings for extensions, for example, will need to be at least 200mm thick, while around 100mm should be deep enough for a shed base.
How much steel is required for footing?
4343 Kg of steel ( 208 kg in footing, 1244 kg in column, 778 kg in plinth beam, 237 kg in door beam, 317 kg in roof beam, 200 kg in chhajjas & 1359 Kg in rcc roof slab) is required for construction of residential building of ground floor of 1200 square feet house.
What is the minimum thickness of a concrete foundation?
The foundation should be cast not less than 1′ 6″ to 2′ 0″ below ground, its thickness not less than 9″ and its width not less than 24″ or a minimum of three times the width of the wall immediately supported by it.
What is the minimum depth of footing?
The minimum depth of footing in sloping ground with the rock, the horizontal distance shall be at least 600 mm or 2 feet from the lower edge of the footing. In case of sloping ground with normal soil, the horizontal distance shall be 900 mm or 3 feet from the lower edge of footing.
How do you calculate the effective depth of a footing?
Hence, the depth of the footing is governed by one-way shear. With effective depth = 600 mm, the total depth of footing = 600 + 50 (cover) + 16 (bar dia) + 8 (half bar dia) = 674 mm.
What is the minimum footing depth for a concrete footing?
Footings need to be minimum 1m deep by 600mm wide.
How do you calculate steel footing?
N = [(Length of Y-direction footing – 2 x cover)/spacing of steel bar] + 1
- A = 1200 mm length in X-direction.
- B = 1200 mm length in Y-direction.
- C = 50 mm cover of footing.
- a = 150 mm spacing in X-direction bar.
- b = 200 mm spacing in Y-direction bar.
- d = 450 mm depth of footing.
- D = Length of 90′ bend.
How many bags of cement do I need for 100 square feet?
4 bags ( 401 kg) of cement and 1593 nos bricks are required for 100 square feet 13.5 inch brick wall.
How many inches of concrete do I need for a foundation?
As a practical consideration, residential designers need to keep in mind that concrete foundation walls are typically 6, 8 or 10 inches thick (nominal). The typical concrete compressive strength used in residential construction is 2,500 or 3,000 psi, although other strengths are available.
What is the standard footing size?
Articles & Tips. Under every house is a foundation, and under most foundations are footings. Most of the time we take footings for granted, and usually we can: For typical soils, a common 16- or 20-inch-wide footing can more than handle the relatively light weight of an ordinary house.
How is footing load calculated?
per square foot. Total load = (½ building width x Post spacing) x (5 lbs. dead load1 + snow load2) = 20′ x 8′ x (5 + 20 lbs. / square foot) = 160 square feet x 25 lbs. / square foot = 4000 lbs.
What’s the minimum thickness for a concrete foundation?
To add to this, Minimum thickness above bottom of concrete reinforcement prescribed for concrete footing is: Reinforced Concrete Footing on Soil: 6 inches (Section 15.7) Reinforced Concrete Footing on Piles: 12 inches (Section 15.7) Minimum Thickness of Plain Concrete Footing on Soil: 8 inches…
What is the minimum thickness of a footing?
Footing depth can be confused with the thickness of a footing. Eight inches is the minimum thickness for a footing. Ten inches is better and twelve inches is highly desirable. The depth of the footing in the ground depends on:
How much steel should be used in concrete?
Minimum Steel Reinforcement in Concrete. The percentages indicated are based on the gross cross-sectional area of the concrete to be reinforced. Where the thickness of the section exceeds fifteen (15) inches (380 mm), a thickness of fifteen (15) inches (380 mm) should be used in determining the temperature or minimum reinforcement.
How big should the base of a concrete footing be?
Its shape is usually square and its thickness is governed by the same considerations as for foundation footings. They are made not less than 1 1/2 times the projection of the slab beyond the face of the pier or column or the edge of the baseplate of a steel column. It should in no case be less than 150mm thick.