﻿14 BULLETIN 23, U. S. DEPARTMENT OP AGRICULTURE. 



thoroughly compacted by rolling with a hand roller weighing from 300 

 to 400 pounds, and any depressions which form should be corrected. 

 This is necessary hi order to secure uniform density and to prevent 

 unequal settlement of the surface. 



HANDLING AND LAYING THE BRICK. 



The brick may all be hauled and piled at convenient intervals along 

 the sides of the roadway before grading is begun, or, if more conven- 

 ient, they may be delivered as needed on the work. Hauling over the 

 finished pavement with wagons until it is complete and opened to 

 traffic should be avoided. If the brick are delivered on the work a s 

 needed, they should be unloaded from the wagons outside of the curb 

 and carried to the pavers, either by hand or in wheelbarrows. Plank 

 trackways should also be provided over the newly laid pavement for 

 the wheelbarrows when they are used. 



The brick should in all cases be uniformly piled by hand on the new 

 pavement conveniently close for the pavers, and each brick should be 

 so placed that the regular operation of picking it up and placing it in 

 the pavement will bring the best edge up. This method of handling 

 the brick requires somewhat more labor than the common method of 

 dumping them from wheelbarrows, but it eliminates to a great extent 

 the practice of picking out and turning over chipped or kihi-marked 

 brick, after the pavement is laid. This is very objectionable on 

 account of the disarrangement of the sand cushion, which is frequently 

 occasioned. 



The brick should be laid on edge and in uniform courses running at 

 right angles to the line of the pavement, except at intersections; and 

 in order to "break the joints" each alternate course should begin 

 with a half brick. In laying the brick the pavers stand on the pave- 

 ment already laid and, beginning at the curb each time, carry across 

 as many courses together as they can conveniently reach. The 

 courses should be kept straight and close together, and if necessary 

 each block of eight or ten courses should be driven back by means of 

 a sledge and a piece of straight timber approximately 2 by 4 inches 

 by 5 or 6 feet long. The brick should also be laid close in the courses 

 and should be crowded together, if necessary, after a course is laid, 

 by means of a crowbar inserted at the curb. 



After the brick are laid, the pavement should be carefully inspected 

 for the purpose of detecting soft or otherwise defective brick. Mis- 

 shapen or broken brick may be detected by the eye alone and the soft 

 brick by sprinkling the pavement with water. The soft brick appear 

 comparatively dry while the water is being applied and comparatively 

 wet after the sprinkling is stopped. All defective brick should, of 

 course, be replaced by others which meet the requirements of the 

 specifications. 



