Masonry Magazine December 1963 Page. 11
Proper cold weather construction precautions are usually included in the job specifications.
We will not attempt to discuss general requirements or recommendations such as are covered in the above reference but will cover only some specific items of importance to the mason contractor.
It is good business for the contractor to provide proper winter storage for his masonry materials. Careless storage of materials will increase the cost of laying the units because ice and snow must be removed from them and the units thawed before work can commence. Materials should be stored on a raised platform above the ground to prevent absorption of moisture from the ground. The units should be covered with tarpaulins or reinforced polyethylene sheets to protect them from snow and ice.
When working in cold weather it is not only advisable but also practical, from the mason contractor's standpoint, to heat the sand and water if necessary. The heating of mortar materials makes them more workable in cold weather and will help maintain good production.
The protection requirements for winter masonry work vary with weather conditions. While some of the requirements may seem strict, they are essential for obtaining proper design strength of the bearing walls. Again, proper protection and heating will also be reflected in increased productivity by the masons.
The scaffolding techniques used in warm weather work do not seem to be particularly adaptable where cold weather protection is required. While it is possible to adapt regular scaffolds for protection of one-story work, the cost of repeating it story after story may be excessive. There is also the problem of the wind resistance of such scaffold covering. Another factor to be considered is that the floor cannot be poured until protection is provided. Of course, interior shear walls or load bearing partitions would have to be laid up before any type of floor system could be placed, but they could be built after exterior walls had been erected.
Where exterior load-bearing walls are concerned, the usual practice is to use tubular or tower type scaffold around the perimeter of the building. Figure 9 shows continuously adjustable tower type scaffolding with a (Continued on page 20)
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ASONRY December, 1963 11