Home -> Forums -> Construction -> Steel -> overlap length to steel

overlap length to steel

Fri Apr 11, 2014Total posts : 4
shaik khaja nayab rasool
shaik khaja nayab rasool
Join date: Apr 2014
Topic: overlap length to steel

hai..what is the minimum and maximam overlap length to extend the steei bars in beams,columns.......for different type of steel dia bars
Sun Apr 13, 2014Post  #1
Abhishek Garg (Builder & Engineer)
Abhishek Garg (Builder & Engineer)

Join date: Apr 2013
Post subject: Lap lengths of various MS steel bars

Dear Rasool: An overlap of about 50 times the diameter of the steel bat should be provided. This principle is referred to as 50D.

The Lap lengths of various diameters of steel bars is as follows:
8mm:   Lap should be 400mm   = 40cm   = 16"   approx.
12mm: Lap should be 600mm   = 60cm   = 24"   approx.
16mm: Lap should be 800mm   = 80cm   = 31.5" approx.
20mm: Lap should be 1000mm = 100cm = 39.5" approx.
25mm: Lap should be 1250mm = 125cm = 49.5" approx.

Laps of neighboring steel bars should be staggered and not be provided at one level/line. At one cross section, a maximum of 50% bars should be lapped.
I hope it helps.
 
Mon Jun 08, 2015Post  #2
kavitha
kavitha

Join date: Jun 2015
Post subject: over lapping length in bars

Hi,
Can i know on what basis the lap lengths you have shared..also can you tell me the code which is talking about the laps in steel bars.
 
Tue Jun 09, 2015Post  #3
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear
See for over lap

Overlapping in Steel Bars in Reinforced Cement Concrete

There should be no joints in steel bars used for RCC work. If it is necessary to use small length steel bars, proper overlap should be given.


The joints of bars should be welded in case the diameter of bars is more than 36 mm. Overlapping of bars should not touch each other and they should be kept apart. Where it is not possible, overlapping bars should be bound together at intervals not exceeding twice the diameter of such bars with two strands of steel wires trusted tight. The overlap should be staggered for different bars. The length of overlap should not be less than 50 times the diameter of steel bar.



 
Tue Jun 16, 2015Post  #4
JAI PRAKASH
JAI PRAKASH

Join date: May 2014
Superb Topic.

 

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