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Development Length

Which of the ...

Question

Which of the following statements are correct?

1. Splices in flexural members should not be at sections where the BM is more than 50% of the moment of resistance.
2. Normal lap splices can be used for all types of bars irrespective of the sizes.
3. Where bars of two different diameters are to be spliced, the lap length shall be calculated on the basis of the diameter of the smaller bar.

A

1 and 2 only

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B

1 and 3 only

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C

2 and 3 only

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D

1, 2 and 3

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Solution

The correct option is D 1, 2 and 3
Splice should be at minimum possible moment.

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Similar questions

Q. Which of the following statement is not correct as per IS 456 : 2000 ?
1. The development length for bundled bars shall be that for individual bars, increased by 10% for two bars in contact.

2. The anchorage length for a standard U-type to hook is 16 times the diameter of bar.

Q. A steel column is to support a factored load of

1200 k N

. The column ends are flushed for complete bearing at a section where it is to be spliced as shown in figure. The allowable stress in the splice plate is

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. The thickness (in mm, rounded off to the multiple of 2) of the splice is: (Take the width of splice plate is

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Q. Assertion (A): A bar tapers from a diameter of

^{'} d_{1}^{'}

to a diameter of '

d_{2}^{'}

over its length

L

and is subjected to a tensile force

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. If extension is calculated based on treating it as a bar of average diameter, the calculated extension will be more than the actual extension.
Reason (R): The actual extension in such bars is given by,

Δ = \frac{4 P L}{π d_{1} d_{2} E}

Q. Consider the following statements dealing with flexural reinforcement to be terminated in the tension zone
1. The shear at the cut-off point not to exceed two-third of the otherwise permitted value.
2. Shear reinforcement is provided along each terminated bar overlapping three-fourth of the appropriate distance from the cut-off point.
3. For 36 mm and smaller bars, the continuing bars shall provide double the area required for flexure at the cutoff and shear does not exceed three-fourth of the permitted value

Which of these statements is/are correct?

Q. Consider the following statements:
1. Reinforcement that is no longer required for flexure beyond a certain section, shall however be extended by d or 12

ϕ

. whichever is greater, before being curtailed.
2. Atleast half the bars should be bent up at the cut-off point.
3. The shear capacity at cut-off point should atleast be 1.5 times the shear force at that section.

Which of these statements are correct?

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