56 



HIGHWAY CONSTRUCTION 



dumping. They are operated in the same manner as drag scrapers, 

 except that all the movements are made by means of the levers, and 

 without stopping the team. By their use the excessive resistance to 



Fig. 35. Wheeled Scraper. 



traction of the drag scraper is avoided. Various sizes are made, 

 ranging in capacity from 10 to 17 cubic feet. In weight they range 

 from 350 to 700 Ib. 



Wheelbarrows. The wheelbarrow shown in Fig. 36 is con- 

 structed of wood and is the most commonly employed for earth- 

 work. Its capacity ranges from 2 to 2J cubic feet. Weight about 

 50 Ib. 



The barrow, Fig. 37, has a pressed-steel tray, oak frame, and 

 steel wheel, and will be found more durable in the maintenance 



Fig. 36. Wooden Barrow. 



department than the all wood barrow. Capacity from 3J to 5 cubic 

 feet, depending on size of tray. 



The barrow, Fig. 38, is constructed with tubular iron frames 

 and steel tray, and is adaptable to the heaviest work, such as 



