Allowable Wastage of construction materials as per BIS in construction projects.

IMAGE CREDIT : BIS

Material Wastage Calculation in construction Calculating material wastage in construction is an important aspect of project management to control costs and improve efficiency. 

#Here' s some steps to Calculate Material Wastage, you can go through it.

1. Understand the Scope: 

Determine which materials are critical to your project and require monitoring for wastage. Common materials include concrete, bricks, steel, tiles, and Timber. 

2. Estimate Requirements: 

Use accurate quantity take-offs or estimates to determine how much of each material is needed for the project. 

3. Factor in Wastage Allowance:

A wastage allowance is added to the estimated quantity to account for losses during handling, cutting, fitting, etc. This allowance varies by material type and project specifics but is generally around 5% to 10% for most construction materials. 

4. Track Actual Consumption:

Monitor and record the actual consumption of materials during the project. This includes deliveries, usage, and any materials returned or discarded due to defects or excess.

5. Calculate Wastage:

Formula:  

6. Analyze and Adjust:

Regularly review wastage figures to identify trends or areas where wastage is higher than expected.  Adjust estimates or processes minimize wastage where possible. 

Tips for Minimizing Material Wastage: 

1. Training: Ensure workers are trained in proper handling and cutting techniques to minimize errors. 

2. Optimized Cutting: Plan cuts to minimize offcuts and Scrap. 

3. Quality Control: Use quality materials to reduce defects that lead to wastage.

4.Inventory Management Keep track of materials on-site to prevent over-ordering or loss. 

5. Reuse and Recycle: Where feasible, reuse materials or recycle waste.

By implementing these steps and tips, you can effectively manage and reduce material wastage in construction projects, leading to cost savings and improved sustainability.

#Here are some Allowable Wastage of Construction Material as per BIS.

WORK NAME	MATERIAL	PERCENTAGE WASTAGES
Concreting	Concrete	3-5 %
Formwork	Timber	5%
Reinforcement	Steel Bar	3-5%
Masonry	Brick & Block	6%
Dry Wall	Fine Aggregates	5%
Wall Screeding	Ready Mix Concrete	7%
Floor Screeding	Ready Mix Concrete	1%
Wall Plastering	Plaster	2%
Ceiling Plastering	Plaster	2%
Floor Tiling	Tiles	6%
Wall Tiling	Tiles	8%
Installation of Bathroom Fittings	Sanitary Fittings	2%
Installation of kitchen Joinery	Kitchen Joinery	1%

POST CREDIT : INTERNET/ BOOKS/ BIS

IMAGE CREDIT : BIS

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