Computing Masonry Works
What is Masonry?
Masonry is the construction of structures using individual units bonded together with mortar. The most common units are:
- Concrete blocks (CHB)
- Clay bricks
- Stones
- AAC blocks (lightweight
Estimating Concrete Hollow Blocks
CONCRETE HOLLOW BLOCKS
Step 1: Determine the Wall Area
A wall is 10 meters long and 3 meters high.
Step 2: Calculate the Total Wall Area
There’s a door of 0.9 x 2.1 m and a window of 0.6 x 0.7, subtract:
Step 4: Multiply by 12.5
Estimating Cement Mortar
CEMENT MORTAR BASED ON CHB PCS
For 4″
| Mortar Fill | 0.003 m^3/pc |
| Block Laying Mortar | 0.0005 m^3/pc |
For 6″
| Mortar Fill | 0.006 m^3/pc |
| Block Laying Mortar | 0.0008 m^3/pc |
Step 1: Multiply the CHB pcs to the multipliers.
Get the number of CHB from above, 347 pcs.
Step 2: Add mortar fill + block laying mortar
Step 3: Identify Class and kg of bags, then multiply
Use class B & 40 kg,
CEMENT MORTAR BASED ON SQ. M
Step 1: Get the Net Area
From what we get before, it’s
Step 2: Multiply to the multiplier:
For 4″
| Mortar (combined fill and block laying) | 0.0438 m |
For 6″
| Mortar (combined fill and block laying) | 0.0844 m |
if we look at the value, it’s almost the same with the value with the chb method.
Step 3: Identify Class and kg of bags, then multiply
Use class B & 40 kg,
Estimating Plaster
PLASTER (VOLUME METHOD)
Using 40 kg, Class B
Example
PLASTER (AREA METHOD)
Using 40 kg, Class B
References:
Fajardo, M. B. (1980). Simplified Construction Estimate.
