Telephone construction and methods and cost by Mayer Clarence

Author:Mayer, Clarence. [from old catalog] & Slippy, John Clifford, 1884- [from old catalog]
Language: eng
Format: epub
Tags: Telephone
Publisher: Chicago and New York, The M. C. Clark publishing co.
Published: 1908-03-25T05:00:00+00:00

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MISCELLANEOUS COSTS.

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Table CXXXIll compares several methods of erecting drop wires. Method "A" is the one generally used for erecting drops for the line orders in the city districts, on which the data in the previous table were based. Method "E" is based on the use of comparatively new material, the qualities of which have not yet been proven.

The fuses used are known as No. 46 critical current 8J/2 amperes, and are installed between the drop wire and rubber-covered leading-in wire.

Table CXXXIV shows the comparative cost of is-pair terminals. The wooden style has been found to be more accessible in sleety weather when **trouble" is most frequent, as ice does not form as readily on wood as metal.

Table CXXXIV.— Comparative Cost to Erect is-Pair Terminal, Not

Including Fusing or Pole Balcony.

No. 14

(grace) No. 8 Comparative Cost

Wooden. Iron. Can. Per Pair.

Pole Terminal Box $3 90 $4.00 $2.88 No. 8 Can $0.61

Splicing Material 70 .70 .70 Wooden 67

All Labor, including lost time 4 01 4 01 4.01 No. 14 Iron 58

$8.61 $8 71 $7.50 NoTB.—^The wooden style permits fusing in the box. This will increase the cost if fuses are added $0.14 per pair.

The cost of fusing for exchange protection is shown in Table CXXXIV. The style of fuses used is known as No. 7-F—critical current Syi amperes.

Table CXXXIV.— Cost of Fusing for Exchange Protection.

Installing Fusb at Junction or Aerial and Undbroround.

Material. Labor.

One 60 pr. box in place $31.00 $1.00

One Splicing 1.50 8.10

One Balcony 1. 60 ....

Pole Changing 8.00

$36.00 $7.70

7.70

Total ■. $42.70

Cost per pair 0. 85

Puaes per pair 0.14

$ 0.99 Say $1.00

The miscellaneous data composing Table CXXXVI will be found useful in estimating lalx)r costs and material quantities for conduit and vault construction.

The cost of unloading and distributing material is based on data collected on many separate jobs. The average cost of teams and labor was respectively $5.00 and $2.00 per day of 9 hours.

The data on the average load carried in a wheelbarrow are based on actual tests made on numerous jobs without either foremen or laborers having previous knowledge that the tests were to be made. They show the average load carried by the average day laborer on conduit work.

The shrinkage of mortar and concrete shown in this table is based on data secured on many conduit jobs. A certain percentage of this shrinkage is caused by loss of material while mixing, incident to mixing on paved streets, rough boards and windy days.

The quantity of mortar used per 1,000 bricks is based on building vaults of sewer brick averaging 8 x 3^ x 2j4 ins. in size; the wall of the vaults being two bricks thick and every sixth course being laid as headers, the horizontal mortar joints being yi in. and the vertical joints }i in. in thickness. Some of the mortar is lost over the back of the wall, some is lost in handling and some is used in incidental work, such as cementing in a sewer trap, etc.

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