Popular Hand Book for Cement and Concrete Users: A Comprehensive and Popular Treatise on the Principles Involved and Methods Employed in the Design and Construction of Modern Concrete Work ...Norman W. Henley Publishing Company, 1911 - 430 стор. |
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Сторінка 18
... pounds net ; natural cements weigh from 250 to 300 pounds net per barrel . The activity of a cement is determined by its rate of setting . For most purposes , where immediate setting is not required to prevent disturbance of the mortar ...
... pounds net ; natural cements weigh from 250 to 300 pounds net per barrel . The activity of a cement is determined by its rate of setting . For most purposes , where immediate setting is not required to prevent disturbance of the mortar ...
Сторінка 21
... pound it is said to have had its initial set . This is usually within 1/2 FIG . 4 - Pats Showing Cracks of Complete Disintegration which Begin by the Radial Cracks Shown in Fig . 3 . hour to 1 hour and the process of manufacture may be ...
... pound it is said to have had its initial set . This is usually within 1/2 FIG . 4 - Pats Showing Cracks of Complete Disintegration which Begin by the Radial Cracks Shown in Fig . 3 . hour to 1 hour and the process of manufacture may be ...
Сторінка 73
... pounds per cubic foot are reasonably safe . " In ordinary walls where the concrete is placed in layers , compu- tation is not usually necessary , since general experience has shown that maximum spacing for 1 - inch boards is 2 feet ...
... pounds per cubic foot are reasonably safe . " In ordinary walls where the concrete is placed in layers , compu- tation is not usually necessary , since general experience has shown that maximum spacing for 1 - inch boards is 2 feet ...
Сторінка 74
... pounds ... Pressure on I square foot in pounds ... 40 160 888 80 160 320 480 640 960 640 1440 2560 5760 10240 16000 23040 1280 1600 1920 in contact . Crude oil is generally employed for the purpose , but any grease that will spread ...
... pounds ... Pressure on I square foot in pounds ... 40 160 888 80 160 320 480 640 960 640 1440 2560 5760 10240 16000 23040 1280 1600 1920 in contact . Crude oil is generally employed for the purpose , but any grease that will spread ...
Сторінка 75
... pounds . 1 E I b h = = = = = Distance between supports in inches . Modulus of elasticity of lumber used . Moment of inertia of cross - section of plank or joist . Breadth of lumber . Depth of lumber . For spruce lumber and other woods ...
... pounds . 1 E I b h = = = = = Distance between supports in inches . Modulus of elasticity of lumber used . Moment of inertia of cross - section of plank or joist . Breadth of lumber . Depth of lumber . For spruce lumber and other woods ...
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