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<\/p>\nWhen the smaller dia bar is lapped with the larger dia bar, lap length or development length should be calculated based on the diameter of smaller dia bar.<\/p>\n
Let’s take an example for this case,<\/p>\n
There is a continuous beam which has two members. First member has a longitudinal bar of 25 dia, and second member has a longitudinal bar of 16 dia. Now while lapping, we continue the 25 dia bar into the second member and extend upto the length ‘Ld’ calculated considering the diameter as 16mm. As there is no requirement for 25 dia bar to be extended where the beam is designed as 16 dia.<\/p>\n
Here are some ‘Ld’ values for info<\/p>\n
<\/p>\n
I. Lap length for bars in bending tension should not be less than ‘Ld’ or 30d<\/p>\n
2. Lap length for bars in direct tension(water tanks) should not be less than 2Ld or 30d<\/p>\n
3. Lap length for bars in compression should not be less than ‘Ld’ or 24d<\/p>\n
According to IS456:2000<\/b><\/p>\n
When bars of different are to be spliced, the lap length shall be calculated on the basis of diameter of smaller bar.(page 45)<\/p>\n
Guideline for calculating lap length<\/p>\n
When the smaller dia bar is lapped with the larger dia bar, lap length or development length should be calculated based on the diameter of smaller dia bar. Let’s take an example for this case, There is a continuous beam which has two members. First member has a longitudinal bar of 25 dia, and second …<\/p>\n","protected":false},"author":2264,"featured_media":920,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"two_page_speed":[],"footnotes":""},"categories":[26],"tags":[154,65],"class_list":["post-919","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gendral-civil-engineering","tag-laping","tag-reinforcement"],"yoast_head":"\n