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Specialize in Cutting Doorways and Windows in Concrete Foundations” Are You in Lebanon Maine? Do You Need Concrete Cutting? We Are Your Local
Concrete Cutter Call 207-284-0788 We Service Lebanon,
ME and all surrounding Cities & Towns Concrete Cutter Lebanon ME Concrete Coring Lebanon ME Core Drilling Lebanon ME Concrete Sawing Lebanon ME Concrete Sawing Lebanon Maine Concrete Cutting Lebanon Maine Concrete Cutter Lebanon Maine Concrete Coring Lebanon Maine Core Driller Lebanon ME Core Drilling Lebanon Maine The
following table will enable you to figure the quantities of each material
needed for any job, by adding together or multiplying the quantities in the
table corresponding to the volumes in the first columns. The first column shows
the quantity of concrete. The other five divisions show the different concrete
mixtures and quantities of material under each concrete mixture needed to
produce the quantity of concrete given in the first section. 1:1%:3Concrete
mixture1:2:3Concrete mixture1:2:4Concrete mixture. To figure out how many cubic
feet there are in a job, write down the dimensions, all in feet or fractions of
feet, so that the result will be in cubic feet. To find the number of cubic
feet in a pavement 30 ft. long, 4 ft. wide and 4 in. thick, write the last
dimension in feet, calling it 4/12 or 113 ft. Then multiply 30x4xl/3 and the
answer will be 40 cu. ft. Look in the table under the concrete mixture you are
going to use. Take the quantities there for your job. Example: If you want to
know the materials for 291 cu. ft. of 1-2-4 concrete mixture, copy out the
figures for 100 cu. ft. and multiply them by 2, to make 200. You will have 44
bags of cement, 88 cu. ft. of sand and 176 cu. ft. of stone. Then look under
the same head, opposite 90 cu. ft.: 19 4/5-bags of cement, 39 3/5 cu. ft. of
sand and 79 1/5 cu. ft. of stone. Then look opposite 1 cu. ft. and you find
7/32 bags of cement, 7/16 cu. ft. of sand and 8 cu. ft. of stone. Adding these
three results you will find 291 Cu. ft. of concrete in a 1-2-4 concrete mixture
will require 64 bags of cement, 128 cu. ft. of sand and 256 cu. ft. of stone or
gravel. For a concrete wall, slab or a roof, you will find it easy to calculate
the total cubic feet of concrete if you will just remember that you must
multiply together the three different dimensions, all expressed in feet or
fractions of feet. A complete test of all the possible stresses
which might be produced under this condition would be long and tedious; but we
may make a first trial of it by finding the stresses which would be produced by
placing the road roller at one of the quarter-points of the concrete arch—a
position which would test the concrete arch almost, if not quite, severely as
any other possible position. Owing to the very considerable thickness of earth
fill, as well as the effect of the pavement, the load of the roller is
distributed in a very much unknown and very uncertain fashion over a
considerable area of the haunch of the concrete arch. The extreme width of such
a roller is eight feet; the weight on each of the rear wheels is approximately
12,000 pounds. We shall assume that the weight of each rear wheel is
distributed over a width of three feet and a length of four feet, so that the
load on the top of the concrete arch under one of the wheels may be considered
at the rate of 1,000 pounds per square foot over an area of 12 square feet. For
the unit-section of the concrete arch one foot wide, this means a load of 4,000
pounds loaded on two concrete which are four feet in total length. The front
roller of the road roller comes between the two rear rollers, and therefore
would affect but little, if any, the particular concrete arch ring which we are
testing. Not only is it improbable that there would be a full loading of the concrete
arch simultaneously with that of a road roller, but it is also true that a full
loading would add to the stability of the concrete arch. Yet, in order to make
the worst possible condition, we shall assume that the part of the concrete
arch which has the road roller is also loaded for the remainder of its length
with a maximum load of 200 pounds per square foot; this item alone will take
care of the effect of the front roller. A load of 1,000 pounds per square foot
is the equivalent of a loading of 6 feet 3 inches of stone; and therefore, if
we draw over concrete Nos. 3 and 4 a parallelogram having a vertical height
above the dead-load line equal to 6 feet 3 inches of stone, and consider a reduced
live-load line 15 inches deep over the remainder of that half-span, we have the
reduced load line for the third condition of loading. Are You in Lebanon Maine? Do You Need Concrete Cutting? We Are Your Local
Concrete Cutter Call 207-284-0788 We Service Lebanon,
ME and all surrounding Cities & Towns |