The approximate steel consumption per sq.Ft built up area bua is 4 kg per sqft for low rise construction i., less than 4 floors of construction.Steel contributes the most among all individual materials, about 25 of total material cost.So, a price rise of rs.5 per kg can make big difference in the total cost of construction.
Rebar is central to reinforced concrete, so a basic understanding helps.The various sizes are important to know a 3 bar is 38 in diameter, a 7 bar is 78 in diameter, etc.The easy rule of thumb for rebar sizes is to take the rebar size and divide by 8 for the diameter in inches.
I am pranav patil, recently i have faced one interview.They asked me to calculate manpower required for a building rcc work whereas building has 4000 sqm built up area for each floor.Total floors are 30 nos.Scheduled completion is 15 month.I calculated manpower requirement as follows.Please suggest me if i wrong.Of floors - 30 nos.
The reason why is fairly simple when your roof slab was constructed contractors generally did not use deformed steel reinforcing bars as they do use today.If fact, the steel rebar or wire mesh that must likely was used in your slab most likely has smooth surfaces, not deformed, thereby allowing much less bonding between the concrete and steel.
A good rule of thumb is to order an extra 5 percent rounded up to the next 14 yd.Waffle slab-concrete slab with reinforcing ribs in two directions.When specifying a restrained footing, you must assure yourself that the final force required to provide the restraint can actually be developed by the restraining construction.
Remember, thumb rules never give the accurate results, but you can use them for approximate results.There are many thumb rules which we apply in construction.Here i am discussing the most frequently used thumb rules on site.Thumb rules used in the construction by civil engineering thumb rule for shuttering work.
Estimation of steel reinforcement quantity is a necessary step in calculating cost of rcc structure along with other building materials as per construction drawing.Accurate calculation of reinforcement in the building plays an important role in the over all costing of the project.
How much steel in one cubic meter of concrete for a rcc slab.Someone said as far as i can remember, 50 kg of cement 1 cu ft in volume per bag cement.Specific gravity of cement 3.15 or equal to 3150 kg cu mtr without more detailed.
Steel reinforcement required for slab of 1750 square feet.According to thumb rule for slab quantity of steel required for slab is about 0.5 to 1 of dry volume of concrete than we take average is 0.75 dry volume of concrete.Density of steel 7850 kgm3.Weight of steel volume density.Weight of steel 0.
Requirement of binding wires for 1 ton 1000 kg of steel reinforcement 9 to 13 kg.Thus, binding wire required for tying 1000 kg of 8 mm bars is about to 12 kg and for 28 mm or 32 mm bars it will be approximately 7 kg.Greater the diameter of the bar, lesser the quantity of binding wire.Also read bbs of rcc lintel beam.
Make embedded plates a minimum 6 in.Larger than required for connections as a rule of thumb.Field fixes for embedded plates that are mis-located are time-consuming and expensive.Rule of thumb the more pieces there are in a connection detail, the more expensive it is to fabricate and erect.Do not over-economize connections.
Steel construction rules of thumb floors beams and girders to calculate the necessary depth of a beam, divide the span in inches by 20.For example, a 25 span would be 25x12 20 15.The width of this beam would be between 13 and the depth.
Steel reinforcement required for slab of 1600 square feet.According to thumb rule for slab quantity of steel required for slab is about 0.5 to 1 of dry volume of concrete than we take average is 0.75 dry volume of concrete.Density of steel 7850 kgm3.Weight of steel volume density.Weight of steel 0.7510029m37850kgm3.
Dec 14, 2018 thumb rule to calculate steel quantity of above slab volume of concrete x density of steel x of steel of member.Steel quantity required for above slab 3 x 7850 x 0.For accurate calculation, you can refer to bar bending schedule.
Civil engineering - steel quantity by thumb rule how can we get the steel quantity by thumb rule i know that it is 1 for slab and 2-3 for rcc column beams.If i have 10 cum rcc work for column beam then how can we get the steel quantity in kgm or qntl.57 answers are available for this question.
Well , reinforcement steel required for slab is nearly 0.8 of the volume of concrete so if concrete is 1 cum then steel will be 10.007 but density of steel is 7850 kg cum so 0.
The steel is required as per the type of structure, that means the tentative calculation of steel is as per below, for foundation slab 80kgcu.For column 100 kgcu.For beam 120 kgcu.Quantity is rcc quantity of structure.
Minimum thickness of rcc slab i recommend is 5 125mm because a slab may contain electrical pipes embedded into them which could be 0.5 or more for internal wiring, which effectively reduces slab depths at certain places, causing cracking, weakening and water leakage during rains.So, a minimum thickness of 5 should be maintained.
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No rule of thumb can be applied to all situations, but remembering these will help achieve a more efficient preliminary layout.Your friendly neighborhood structural engineer is an expert in structural steel design, so when in doubt, dont hesitate to call with questions.6 rules of thumb for structural steel design by craig w.
Meter of average steel reinforcement quantities is there a difference in steel roofing material how much steel is required for.Know more quantity and rate analysis for reinforced concrete.Chat online weightof steel in a cubic metre of concrete - amarcord.
Following are the steps to calculate the quantity of steel for rcc slab 1.Prepare a bar bending schedule in order to classify different shapes of bars bent up bar, straight anchor bar, eos bar, curtail bar etc and diameters.List down all the shapes.
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