Steel is an alloy of iron usually containing less than 1% carbon which is used most frequently in the automotive and construction industries or is cast into cans, bars, strips, sheets, nails, spikes, wire, rods or pipes as needed by the intended user.
Timber: Timber has higher strength per unit weight and is very suitable for earthquake resistant constructions.However timber use is generally restricted in construction for more than two story buildings.
Whether the cement is fresh, not partly set due to moisture.
Whether the sand for making mortar is clean, free from silt, vegetable matter, or cow dung.
The following construction practices must be ensured:
Whether the masonry units are soaked in water before laying.
The masons build the walls truly vertical with the courses level.