Concrete Cutting Cutter Ipswich MA Mass Massachusetts

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Ipswich Massachusetts Concrete Cutting and Core Drilling

This is done with a large nail or a hammer handle. For a round structure two sets of circular forms are usually needed, namely, inner and outer forms. Both of these come into use when building a silo or other structure having a thin wall, but in the case of a solid column only the outer form is necessary. Both inner and outer forms are made practically the same, except that the radius of the outer one is of necessity greater than that of the inner because of the thickness of the walls between the two forms. A simple method of drawing the circle for the outer form is as follows: Take a piece of string, attach one end to a long spike, marked "A,", and stick it into the ground. Measure off on the string one-half the diameter of the circle desired, tie a knot, through which force a nail (marked "B," Fig. 4), and, keeping the string stretched between these two points, draw a continuous line. Lay the boards around the line just made, nail them together firmly and then mark the one sand screen, 1/4-inch or 1/8-inch mesh, for screening sand from the gravel.� One mixing platform about 10 feet square built so substantially that it can be moved without coming to pieces, having a 2 X 3-inch strip around the edge to prevent the waste of materials and water. This platform can be made of i-inch stuff, resting on joists about 2 feet apart, provided it is stiffened by being tongued and grooved. Concrete should be mixed as near the place where it is to be used as practicable, so as to avoid delay in getting it into place. If left standing any length of time it will set and become useless. To avoid this, mix small batches at a time, using on a small job not-more than a half barrel or two bags of cement to the batch. Should the cement take its initial set, i. e., begin to harden, before being placed in the forms, so that it lumps when re tempered, discard it, as the hardening qualities of cement are affected if disturbed after it has begun to set. If sand or gravel requires washing, add to the above list of tools and apparatus: One washing screen for sand with 30 meshes to the linear inch. One washing screen for gravel with V4-inch meshes. Too much attention cannot be paid to this important part MEASURING of concrete making. The best and most convenient way to measure the sand and stone is to make a measuring box or frame as shown. The inside dimensions of the box for different mixes of concrete are given in the table below, the size of the box being based on a two-bag batch of concrete; that is, using two bags granulated Portland cement to each batch. The use of the box or frame for measuring can be best illustrated by the following example: the table a measuring frame or box, 10 inches high by 2 feet 4 inches by 4 feet inside dimensions must be made. Lay this box on the mixing platform, fill it exactly half full of sand, up to a mark previously made all around it, and level off the sand to make sure that the sand just fills half the frame, and then raise the measuring frame. Dump two bags of cement on the sand and mix it as described under "Mixing". Even off the mixed cement and sand, place the measuring box on top of it and fill the frame with stone level with the top. Level off the stone carefully, raise the measuring box and the correct amount of stone is ready to be mixed with the cement and sand. Another way to measure the sand and stone is by using a wheelbarrow. To determine the capacity of the wheelbarrow, dump into it one or two bags of cement and see how much of the wheelbarrow is filled; taking this as a unit, measure the sand and stone accordingly, using perhaps a little less of the sand and stone than would be indicated by the cement measure considered as one part. This method is not nearly as accurate as the first one, and if used the barrow should be filled with the cement two or three times a day to keep the eye trained.