How do you calculate extra bars on a beam?

1. Step 1 – Find cutting length of top bar. Cutting length of top bar = Clear Span of Beam + Development length (Anchorage) Ld on 2 sides – Clear Cover on 2 ends.
2. Step 2 – Find cutting length of bottom bar.
3. Step 3 – Find out Number of Stirrups.
4. Step 4 – Find out cutting length of Each Stirrup.

How do you calculate extra bars?

Top and bottom clear cover of slab is 20 mm. Side clear cover of slab 25 mm. Thickness of slab is 150 mm. Length of top extra bar = L/4 = 2000/4 = 500 mm.

What is extra bar in beam?

1) Extra top bar are provided to increase tensile strength of beam ( to control negative moment) at support. 2) To resist diagonal tension stress and in order to prevent inclined cracks to occur by action of maximum shear stresses which concrete fails to resist.

How do you calculate extra bars in a slab?

Steps to calculate the Reinforcement required for Slab:-

1. Deduct the cover for finding length of bar.
2. Evaluate the length of the distribution bar.
3. Calculate the Value of ‘D’ (Depth of slab- Top cover- Bottom cover)
4. Find out the No. of Bars.
5. Compute the Total wt of steel required for slab reinforcement.

What is bottom bar and top bar?

Bottom app bars provide access to a bottom navigation drawer and up to four actions, including the floating action button. The top app bar displays information and actions relating to the current view. Related article arrow_downward. Bottom navigation. Allow movement between primary destinations in an app.

Why we use extra bar in slab?

Extra Bars:- The extra bar is provided at the bottom of Cranked bars to maintain the framework of the slab. The length of Extra bar is L/4. Deduct the cover for finding length of bar. Compute the Total wt of steel required for slab reinforcement.

What is embedment ratio?

The embedment ratio (Hemb/Dp) is identified as the ratio of the distance between the surface of the ground and the uppermost plate to the plate diameter.

What is an extra bar in beam construction?

Any where in the length of the beam two bars should be placed for both top and bottom locations. So any bat other than the two is called extra bar. In your calculation provide two of the bars throughout the beam length and perform curtailment ( cutting the bar after its development length).

How to calculate the number of bars in a beam?

Beam is doubly reinforced (requires compression reinforcement), this is the typical case. Then calculate Ast and Asc. Beam is singly reinforced (does not require compression reinforcement). Then calculate Ast (Asc = 0). Choose a diameter for the bars and determine the number of bars.

How do you determine the cut off points of a beam?

Your cut off points need to correspond to the actual inflection points and distribution of moment along the span. If you’ve got serious bottom steel at your supports, it suggests that your beam may be part of a moment frame. And that means inflection points near to mid-span.

How to calculate the extra length of a bar?

Extra bar length calculation is easy. To determine extra top length use formula= L/4 for outer span and L/3 for inner span. Here, L is the length of span. And for extra bottom length will deduce from span length is L/8 that means, L/8 length will deduce from both support.