How do you calculate steel reinforcement?

The quantity is done in two steps.

1. (Calculation of Bars No’s) First, calculate the number of bars required (main and distribution both). FORMULA = (Total length – Clear cover)/center to center spacing + 1. Main bar = (5000 – (25+25))/100 + 1.
2. (Cutting length) MAIN BAR: FORMULA = (L) + (2 x Ld) + (1 x 0.42D) – (2 x 1d)

What is the lap length of 12mm steel bar?

Lap length for 12mm bar used in column:- assuming 12mm bar of Fe500 provided in RCC column, their lap length should be 45d, where d is diameter of rebar which are going to be used, calculation of lap length for 12mm bar = 45×12= 540mm (0.54m) or 1.77feet, so lap length for 12mm bar used in column is 540mm (0.54m) or …

What is laping length?

Lapping can be defined as the overlapping of two bars side by side to upto the design length. Lapping is usually done where minimum bending stress is encountered. In general, lap length is 50d which means 50 times the bar diameter, if both bars are of same diameter.

How do you calculate overlap length?

In general, lap length is 50d which means 50 times the bar diameter is provided if both bars are of same diameter. For flexural tension – Ld or 30d whichever is greater is considered. For direct tension – 2Ld or 30d whichever is greater is considered.

How do you calculate reinforcement in KG?

HOW TO CALCULATE STEEL WEIGHT IN KG

1. Weight of bar in kg/meter should be calculated as (d2 ÷ 162) where’d’ is the diameter of bar in mm.
2. ‘L’ for column main steel in footing should be considered as minimum 30cm/as specified.
3. For bent up bar add 0.42d in straight length of bar where’d’ is the clear depth of beam/slab.

What is lapping formula?

Normally lap length is 50D meaning 50 times the bar diameter if both bars are of same diameter. When lapping two bars of different diameters, the lap length is considered as 50 times the smaller diameter. Steel bar lapping in construction. Steel Lapping Formula Lap length = 50 X Diameter.

How is Anchorage length calculated?

1) Tensile bar

1. lb,rqd (basic required anchorage length) = 484 mm.
2. α1(effect of the form of the bars) = 1.
3. α2(effect of concrete minimum cover) = 0.71.
4. α3(effect of transverse reinforcement) = 1.
5. α5(effect of the pressure transverse) = 1.
6. α2 · α3 · α5 = 0.71 (≥ 0.7)
7. lb,min = max(145 ; 120 ; 100) = 145 mm.

What is LD in reinforcement?

A development length can be defined as the amount of reinforcement(bar) length needed to be embedded or projected into the column to establish the desired bond strength between the concrete and steel (or any other two types of material).

How do you calculate rebar lapping length?

Normally, lapping position is at where near the minimum shear force is acting. Normally lap length is 50D meaning 50 times the bar diameter if both bars are of same diameter. When lapping two bars of different diameters, the lap length is considered as 50 times the smaller diameter.

How do you calculate steel overlap?

How do you calculate lap length in reinforcement as per IS code?

2. Lap length in Tension

1. Class A Splice: Lap Length ls = 1.0 ld.
2. Class B Splice: Lap Length ls = 1.3ld.
3. ls = 0.0005fy (d) ; [ For fy less than or equal to 60,000psi]
4. ls = (0.0009fy – 24)d; [ For fy > 60,000 psi]