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Crank Details

Crank Length: - 
Crank length is provided in Slab Shear stress is maximum at supports in Slab. So, to resist this stress we usually crank the bars at the ends of supports in slab, 

Crank bar is bent up at an angle of 45 degree 
with the length of 0.42 D 
D = Depth of Slab-Top Cover-Bottom cover

Crank is a slight bending in bars at the lap so that maintains the clear cover even at the lap position.The rule that is generally practiced is that the slope of crank 1:10 & minimum length of crank 300 mm.

Formula of Crank length = (d1+d2+5)*10mm
d1 =diameter of smaller bar
d2 = diameter of largest bar

क्रैंक लंबाई: -
स्लैब शीयर में क्रैंक की लंबाई प्रदान की जाती है, स्लैब में समर्थन अधिकतम होता है। इसलिए, इस तनाव का विरोध करने के लिए, हम आमतौर पर स्लैब में समर्थन के सिरों पर सलाखों को क्रैंक करते हैं,
क्रैंक बार 45 डिग्री के कोण पर मुड़ा हुआ है
0.42 डी की लंबाई के साथ
D = स्लैब-टॉप कवर-बॉटम कवर की गहराई
क्रैंक लैप पर सलाखों में हल्का सा झुका होता है ताकि लैप पोजीशन पर भी स्पष्ट आवरण बना रहे। आमतौर पर प्रचलित नियम यह है कि क्रैंक 1:10 की ढलान और क्रैंक 300 मिमी की न्यूनतम लंबाई।
क्रैंक लंबाई का फॉर्मूला = (d1 + d2 + 5) * 10 मिमी
d1 = छोटे बार का व्यास
d2 = सबसे बड़े बार का व्यास




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