Estimating common wire nails for building projects.(approx.)

There are Four (4) basic steps in calculating the quantity of common wire nails be procured for works.

1. Determine the nail points
2. Determine the size (length and diameter) of nails
3. Determine the weights of nails
4. Adjustments

Step 1
The estimator is expected to relatively know the joint sections that require nailing and the number of nails for each joint section, hence the number of nails can be determined.

Step2
The required nail size (length and diameter) for the nail points identified should be determined by the estimator in conjunction with the Carpenter. Where the carpenter is not available the estimator can guide himself/herself by ensuring that the nail is driven 3/4deep into the base member, i.e length of nail = (thickness of other members + 3/4 of base member thickness).

Step 3
Use the formula below to determine the approximate weight of nails for the different nail sizes.
Wn = (22/7)*(nail diameter/2)^2*length of nail*7850
The answer obtained is in kilogram (kg).

Step 4
A. Multiply the total number of nails by the their respective weights to obtain the total kilogram of nails
B. Apply the required factors for reuse and wastage (application, residual, theft etc) to obtain the actual quantity of nails to be purchased.

Note: It is good practice to carry out Steps 1 and 2 at the same time (simultaneously) in order to ease computations and to avoid omissions, especially in large and complex jobs.

Reference: www.conloorke.com

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