Boston Concrete Cutting
288 Grove Street, Unit 110
Braintree, MA 02184


781-519-2456
info@bostonconcretecutting.com
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Concrete Cutting Sawing Lakeville MA Mass Massachusetts

Welcome to BostonConcreteCutting.Com

“We Specialize in Cutting Doorways and Windows in Concrete Foundations”

Are You in Lakeville Massachusetts? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 781-519-2456

We Service Lakeville MA and all surrounding Cities & Towns

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The concrete structure was located on the south side of Walnut Street, between Ninth and Tenth Streets, Philadelphia. This building was erected during the summer of 1907. It has a frontage of 27 feet on Walnut Street, and a depth of 165 feet on Hutchinson Street, and is eight stories high. It was constructed for manufacturing and storage purposes, and the concrete floors were designed to carry a uniformly distributed, live load of 200 pounds per square foot. At the time that this building was constructed, the Building Code of Philadelphia permitted a working stress of 500 pounds per square inch in compression in concrete, and a tensile strength of 16,000 pounds per square inch in the reinforcing steel. The concrete could be made of any desired proportions that would insure an ultimate strength of 2,000 pounds per square inch. A thickness of 2 inches of concrete was required on the outside of the reinforcing steel in columns, girders, and concrete beams, and 1 inch on the bottom of concrete floor- concrete slabs. The Building Code required that all girders, concrete beams, and concrete slabs should be considered as simple concrete beams supported at the ends, no allowance being made for continuous construction over supports. Owing to the building being only 27 feet wide, interior columns were not required, and therefore concrete footings were needed only along the two sides of the building. The concrete footings along the Hutchinson Street side of the building were designed as isolated concrete footings, as shown in the general plans, and detailed in Fig. 194. But this type of construction could not be used to support the columns of the Opposite side of the building, owing to the adjacent property; and therefore a continuous concrete footing was used.

This concrete footing, which is 3 feet deep, 6 feet wide and reinforced with 18 twisted bars, 11 inches square, is really an inverted beam with a span of 14 feet 9 inches. In designing this inverted beam, the load was considered the same as the load permitted on the soil, which were 3- tons per square foot. See Fig. 195. In designing the columns, a working stress of 500 pounds per square inch was allowed for the whole section of the column. The steel reinforcement consists of round bars, banded every 12 inches with a 2-inch bar. The area of the longitudinal bars was less than one per cent of the area of the section of the column. The columns -decreased in size from 32 by 36 inches in the basement to 12 by 28 inches at the eighth concrete floor. All the concrete floor-concrete beams were the same size, being 10 inches wide and 18 inches in depth below the concrete slab; but the amount of reinforcement was varied. In the cross-concrete beams between the columns, the reinforcement consisted of 5 twisted bars 1 inch square; but 6 bars 1 inch square were required for the cross-concrete beams between the longitudinal concrete beams, as the span was 4 to 5 feet longer for most of the concrete floors. The detail of the concrete beams between the columns is shown in Fig. 196a. The longitudinal concrete beams between the columns were reinforced with 4 twisted bars 1 inch square, the details of which are given in Fig. 196b. The stirrups for all the concrete beams were made of i-inch round steel bars. The concrete beams were connected by a 5-inch concrete slab reinforced with i-inch square bars spaced 5 inches. The exterior and interior of a factory building, designed and constructed by Wm. Steele & Sons Company for the Erben-Harding Company, Philadelphia, are shown in Figs. 197 and 198. This building is 100 feet by 153 feet, and was constructed structurally of reinforced concrete, except that structural steel was used in the columns. The concrete floors and columns were designed to support safely a live load of 120 pounds per square foot. The concrete floor-panels were about 12 feet by 25 feet, the girders having a span of about 12 feet, and the concrete beams a span of 25 feet.

One intermediate beam was placed in each panel, as shown in the interior view. The girders were 12 inches wide and 20 inches deep below the concrete slab, and were reinforced with 4 bars 1 inch in diameter. The concrete beams were 12 by 18-inch, and were reinforced with 4 bars 11 inches in diameter. The concrete floor concrete slab was 4 inches thick, and was reinforced with 3-inch mesh, No. 10 gauge, expanded metal. The columns were all 18 by 18-inch; but the structural steel (4 angles arranged as shown in Fig. 199) in the columns was designed to support the entire load bars were placed in the columns and wrapped with expanded metal. The exterior columns were exposed to view on both the exterior and the interior of the building. The entire width between the concrete columns was filled by triple windows. The concrete beams were constructed flush with the exterior surface of the concrete wall. The concrete floor finish of this building is somewhat unusual. Sills 2 by 4 inches were laid on the structural concrete floor-concrete slab of concrete, and the space between these sills was filled with cinder concrete. On these sills was laid a covering of 2-inch tongued-and-grooved plank; and on these planks was laid a concrete floor of -inch maple, the latter being laid perpendicular to the 2-inch plank. In constructing the new shop building at Swarthmore College, Swarthmore, Pennsylvania, in 1906, concrete blocks were used for the side concretes, and the concrete floors were constructed of reinforced concrete. This building is 49 feet 8 inches by 112 feet, and is 3 stories high. The concrete floors were designed to carry a live load of 150 pounds per square foot. A factor of safety of 4 was used in all the reinforced-concrete construction. The columns are located as shown in Fig. 200. The span of the girders is 20 feet, except for the three middle bays, in which the span is only 10 feet. The 20-foot girders are 14 inches wide, and the depth below the concrete slab is 23 inches. The reinforcement consists of 8 bars inch square.

The details of these girders are given in Fig. 201. The concrete beams are spaced 5 feet center to center. The span of these concrete beams is about 16 feet, the width 8 inches, and the depth 12 inches below the concrete slab; and the reinforcement consists of 5 bars - inch square. The concrete slab is 4 inches thick, including the top coat of 1 inch, which was composed of 1 part Portland cement and 1 part sand. This finishing coat was put on before the other concrete had set, and was figured as part of the structural concrete slab. The concrete slab reinforcement consisted of steel encased in concrete. The concrete concretes had been built to the proper height for the lintels to be placed. The size of the lintels was varied on the different concrete floors to conform to the architectural features of the building. The width of the lintels was made the same as the thickness of the concretes, and therefore both sides of the lintels were exposed to view. The lintels were reinforced with 3 bars I inch square. The concrete was composed of 1 part Portland cement, 3 parts sand, and 5 parts stone. The stone was graded in size from 2 inch to 3 inch. "Johnson" corrugated bars were used as the reinforcing of the concrete.

Are You in Lakeville Massachusetts? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 781-519-2456

We Service Lakeville MA and all surrounding Cities & Towns

Boston Concrete Cutting | 288 Grove Street, Unit 110, Braintree, MA 02184 | 781-519-2456 | info@bostonconcretecutting.com