. Engineering and Contracting . foruse. Useful suggestions on these points are given in theMay-June Concrete Builder, a publication of the PortlandCement Association. A building that can be kept absolutelydry at all times is necessary for the proper storing of a board flow is used it should be double with a layerof tarred paper between two sections. This constructionmakes for dryness. The walls of a frame building may bemade dampproof with one or more thicknesses of tarred the roof of such a structure, tarred paper roofing onsheathing, laid with tight joints lengthwise o
. Engineering and Contracting . foruse. Useful suggestions on these points are given in theMay-June Concrete Builder, a publication of the PortlandCement Association. A building that can be kept absolutelydry at all times is necessary for the proper storing of a board flow is used it should be double with a layerof tarred paper between two sections. This constructionmakes for dryness. The walls of a frame building may bemade dampproof with one or more thicknesses of tarred the roof of such a structure, tarred paper roofing onsheathing, laid with tight joints lengthwise or in clapboardfashion crossways is satisfactory. At least a foot for dripor overhang should be allowed on all sides. The roofingshould be firmly fixed and watertight so that it cannot beraised by wind, and the rain cannot beat in under the is advisable to have no more windows than absolutely nec-essary. If a permanent structure is to be erected either mono-lithic concrete, concrete block or concretestructural tile will. Wooden Pile Drivers at Work on Dvina Bridge. Cave dwellers never lived more primitively than these onceprosperous twentieth century citizens. Without light or fuel,without water or plumbing, food or clothing or shoes, thethrowback to the primitive which the life of the people ofDvinsk has undergone is disastrous. When the AmericanRed Cross arrived there it found 30 or 40 dying daily fromstarvation. The situation is one of the most baffling thatthe Red Cross has undertaken in Europe. There are no industries left in Dvinsk, once one of thebusiest centers of Western Russia. All machinery, all toolshave disappeared—carried off or wrecked by the contendingarmies. Recently, when Polish engineers set to work to re-build a wrecked bridge across the Dvina, the only tools theyhad to work with were hatchets. The timbers of this bridgeare all hand hewn, yet it is noticable how evenly they aresquared and finished off. For putting down the piles, driverswere built
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