. Handbook of construction plant, its cost and efficiency. com-pact any thickness from two to ten inches, but it is not usuallyeconomical to compact a greater thickness than four to sixinches at one operation. The material is put into condition fortamping by puddling with water or some other liquid, but caremust be taken to use the proper amount of liquid in order thatthe mixture may be of the proper consistency. The feet of theroller are nine inches long. The body is composed of two woodendrums with a tamping width of six feet. It is usually drawnby four horses. This machine is also very usef
. Handbook of construction plant, its cost and efficiency. com-pact any thickness from two to ten inches, but it is not usuallyeconomical to compact a greater thickness than four to sixinches at one operation. The material is put into condition fortamping by puddling with water or some other liquid, but caremust be taken to use the proper amount of liquid in order thatthe mixture may be of the proper consistency. The feet of theroller are nine inches long. The body is composed of two woodendrums with a tamping width of six feet. It is usually drawnby four horses. This machine is also very useful in compactingearth embankments. Weight of machine 4,800 pounds, price$150. Another type is illustrated in Fig. 186. Rooter-Scarifier, or Gang- Road Rooter: Fig. 187. This ma-chine is a combination of plow, rooter and scarifier. It is com-monly operated by a traction engine. Weight of machine 4,000pounds, price $450. PAVING EQUIPMENT Spike Disc Scarifier: Fig. 188. This implement is constructedand operated on the principle of a disc harrow, but having. Fig. 187, Petrolithic Gang Rooter. Combined Plow, Rooterand Scarifier for Road or Other Heavy Work. peculiarly shaped spikes instead of cutting discs. It is usuallydrawn by four horses. Wttien used in connection with the rooter,its particular function is to break up and pulverize the clods.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuilding, bookyear191
