NASCLA Accredited Commercial General ContractorMasonryEasy
A masonry contractor is preparing to lay brick in cold weather conditions. According to industry standards, what is the minimum ambient air temperature below which special cold weather precautions for masonry work typically become mandatory?
- A50°F (10°C)
- B40°F (4°C)
- C20°F (-7°C)
- D32°F (0°C)
Show answer & explanationAnswer & explanation
Correct answer: B. 40°F (4°C)
Cold weather precautions for masonry work are generally required when the ambient air temperature falls below 40°F (4°C) to ensure proper curing and strength development of the mortar.
Why the other options are wrong
- A. This temperature is too high; cold weather precautions are not typically required at 50°F.
- C. This temperature is well below the threshold where precautions are already mandatory and would require even more stringent measures.
- D. While freezing is a concern, standard masonry cold weather protocols typically begin at a slightly higher temperature.
Cold Weather Masonry Threshold
The minimum ambient air temperature at which special precautions must be taken for masonry construction to prevent damage and ensure proper mortar curing.
- Typically 40°F (4°C)
- Prevents freezing of mortar water
- Ensures proper strength development
Memory trick: Forty degrees is where the cold masonry story begins.