How To Calculate Steel Quantity Of Lintel Beam - Bar Bending Schedule

In this article, we will guide you on how to prepare BBS of RCC Lintel Beam.

DETAILING OF LINTEL BEAM

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STEP-1: Calculate Length Of One Main Bar

Length of one bar = Length of door opening + (2 x bearing length) – clear cover for both sides

Length of door = 1200mm - 1.2m

Bearing length = 150mm (150 mm to 200 mm bearing length should be provided and it should be placed on the motor.)

Clear cover = 25mm (we will take 25mm as clear cover)

Length of one bar = 1.2+ (2 x 0.150) – 0.025 =1.475m

STEP-2: Calculate Total Length Of Main Bars

Before we calculate the total length of the main bars. We should know how many bars we are going to use in lintel reinforcement.

Below tips from lceted will help you to select proper how many bars we should you

 

STANDARD LINTEL SIZE FOR DOOR OPENING & REINFORCEMENT DETAILS

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As we have a length of the lintel is more than 1.3m so we will have to choose 5nos of bars for the lintel reinforcement

So,

We need 5 nos of 1.425m length of 10mm bars. In that case

Length of 5 bars = 1.425 x 5 = 7.125m

 

STEP-3: Calculate Weight Of Steel For Main Bars

Weight of steel for 10 mm bar = D²L/162 = 10² x 7.125/162 = 4.398 kg.

STEP-4: Calculate Length Of One Stirrups

As we know size of bar is 200mm x 200mm

Cutting length of stirrups = (2x depth distance) +(2xWidth depth) + Hooks Length – Bend

Depth distance = depth – (2 x clear cover) – (dia of stirrups)

Depth distance = 200 -25 -25 - 8 = 142 mm

width distance = depth – (2 x clear cover) – (dia of stirrups)

width distance = 200 -25 -25 - 8 = 142 mm

Hooks length = 9d

Bend = 2d

We have 2 hooks and 5 bend

So,

Cutting length of stirrups = (2×142) + (2 x 142) + (2x9x8) –(5x2x8) = 632 mm = 0.632 m

STEP-5: Calculate No Of Stirrups

No of stirrups = (Total length of lintel / distance between strriups) + 1

= (1.475/0.150) + 1 = 10.8 = 11nos

Total length of stirrups = 0.632 x 11nos = 6.952m

STEP-6: Calculate Weight Of Steel For Stirrups

Weight of steel for stirrups = D²L/162 = 8² x 6.952/162 = 2.746 kg.

So we can order steel bar as,

7m (6.952) of 8mm bar

7.5m (7.125) of 10mm bar

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Must Read: Types of TMT Bars and Thier Uses In Construction

Must read: BBS Basics: Lapping, bend, development and hook length calculation

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