Skip to main content

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




Labels:
Location: India

Comments

Post a Comment

If you have any doubts,please let me know.

Popular posts from this blog

MACHINE FOUNDATION.

MACHINE FOUNDATION. The design of machine foundation involves careful study of the vibration characteristics of the foundation system. Relevant data for the design and construction of the foundation of machine should be obtained from the manufacturer of the machine , prior to the start design.  All parts of machine foundation should be designed for maxim stresses due to the worst combination of vertical loads, torque, longitudinal and transverse forces, stresses due to temperature variation and the foundation dead load. In case, the foundation layout is partly built up of beam and column construction , straight bars should be provided both at top and bottom of the beams and the spacing of the stirrups should be close. The main foundation block should have the designed thickness and should be reinforced both at top and bottom even if the reinforcements are not required from design considerations. Machine foundations  are special types of  foundations  required fo...
Post a Comment
Read more

Concrete Mix Design

Concrete Mix Design Concrete mix design is the method of optimally dosing various components of concrete,such as cement, aggregates, water,and additives, to make concrete less costly and will have specific  workability and homogeneity properties in the fresh state and strength and durability in the hardened state. Purpose of concrete mixes The main objective of the dosage of concrete mixes is to make a concrete that has the following characteristics: 1. Satisfy viability requirements in terms of drop to facilitate placement and consolidation. 2. Meets resistance requirements. 3.  Can be mixed, transported, placed and compacted efficiently. 4. Economical to manufacture. 5. Meets durability requirements to withstand the environment in which the structure is expected to serve Mixing ratio procedure Step 1. Calculate the target average compressive strength for the mixing ratio: The target 28-day average compressive strength according to clause 3.2 of IS 10262. ft = fck + 1.65...
Post a Comment
Read more

Column

Column.  A column may be defined as an isolated vertical load bearing member the width of which is neither less than its thickness nor more than four times its thickness. Pier is a vertical load bearing member similar to a column except that it is bonded into load beating wall at the sides to form an integral part and extends to full height of the wall. A pier is introduced to increase the stiffness of the wall to carry additional load or to carry vertical concentrated load. Pier also strengthens the wall to resist lateral pressure without buckling. a supporting pillar especially : one consisting of a usually round shaft, a capital, and a base a colonnade of marble columns. something resembling a  column  in form, position, or function a  column  of water columns of smoke. The  row  is an order in which people, objects or figures are placed alongside or in a straight line. A vertical division of facts, figures or any other details based on category, ...
Post a Comment
Read more