Detailing of reinforcement, steel, prestress structures are discussed in this section. Different detailing techniques applied as per the various guidelines are explained in detail for better understanding. Most of the detailings are based on the British Standards.
CURTAILMENT OF BEAM REINFORCEMENT
Following figure extracted form Standard Method of Detailing Structures indicate the curtailment of beam top reinforcements.
Most simplest method of doing the curtailment of reinforcement is indicated in above figure. In this method, we need to provide the tension anchorages length form the no longer required point. No longer required point is defined as the location where there is no requirement of have that bar. It is the point that has the bending moment capacity of continuing bars. Beyond this point we continue an anchorage length from discontinuing reinforcement. Similarly bottom reinforcement also can be curtail as shown in the following figure.
In addition, when there is not continuing bars, same theory will be applied. However, other requirement for lapping of reinforcements shall also be satisfied. For Example Refer following figure.
Curtailments of this nature can also be observed in reinforcement detailing. In this situation, main hogging reinforcement bars are terminated and then smaller bar continue towards the mid span.
For example, when we required 2T25 bars hogging, they can be terminated and smaller bar like 2T16 can be continued in to the span. Based on the lapping arrangement of the reinforcements, lap length may need to be multiply by 1.4 factor. Cl 3.12.8.13 of BS 8110-1:1997 could be referred for multiplying factor.
Curtailments of this nature can also be observed in reinforcement detailing. In this situation, main hogging reinforcement bars are terminated and then smaller bar continue towards the mid span.
For example, when we required 2T25 bars hogging, they can be terminated and smaller bar like 2T16 can be continued in to the span. Based on the lapping arrangement of the reinforcements, lap length may need to be multiply by 1.4 factor. Cl 3.12.8.13 of BS 8110-1:1997 could be referred for multiplying factor.