This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 Excerpt: ...dimension, and to limit the length to within three times the thickness. When the breadth or the length is considerable in comparison with the thick ness, there is danger that the block may break, if any unequal settling or unequal pressure should take place. As to the absolute dimensions, the thickness is generally not ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 Excerpt: ...dimension, and to limit the length to within three times the thickness. When the breadth or the length is considerable in comparison with the thick ness, there is danger that the block may break, if any unequal settling or unequal pressure should take place. As to the absolute dimensions, the thickness is generally not less than one foot, nor greater than two; stones of this thickness, with the relative dimensions just laid down, will weigh from 1,000 to 8,000 pounds, allowing, on an average, 160 pounds to the cubic root. With these dimensions, therefore, the weight of each block will require a very considerable power, both of machinery and men, to set it on its bed. From some quarries the formation of the stone will allow only blocks of medium or small size to be furnished, while from others stone of almost any dimensions can be obtained. 331. Accuracy of dressing.--The closeness with which the blocks fit is solely dependent on the accuracy with which the snrfaces in contact are wrought or dressed; if thi3 part of the work is done in a slovenly manner, the mass will not only open at the joints with an inequality in the settling, but, from the courses not fitting acurately on their beds, the blocks will be liable to crack from the unequal pressure on the different points of the block. To comply with the first of the general principles to be observed in the construction of masonry, we should have, in a wall supporting a vertical pressure, the surfaces of one set of joints, the beds, horizontal. This arrangement will prevent any tendency of the stones to slip or slide under the action of the weight they support. The surfaces of the other set should be perpendicular to the beds, and at the same time perpendicular to the face, or to the back of the wall, accord...
Read Less
Add this copy of Elementary Course of Civil Engineering for the Use of to cart. $74.74, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
