264 



THE BOOK OF THE LANDED ESTATE. 



An estimate of the value of bricklayers' work may be arrived at by 

 calculating that a rood of seven yards will take six hundred and sixty 

 bricks in its erection ; that a bricklayer's wages are usually from 4s. to 

 5s. 6d. per day, and his labourer's, 2s. 6d. to 3s. ; and, at the same time, 

 to take into account that a bricklayer and his labourer conjointly will 

 lay about one thousand bricks in a day. The value of the lime and sand 

 will also have to be taken into account. 



When the work is let by the rod, it must be calculated that this 

 measures eleven and a half cubic yards ; and a rod of brickwork, when 

 laid so that a foot in height will take four courses, will require nearly 

 four thousand three hundred and fifty bricks ; and the same extent of 

 brickwork will take nearly one and a half cubic yards of lime and three 

 loads of sand. 



3. Roofs. In the construction of roofs there are several forms of trusses 

 in use. I shall describe the principal of those which I have adopted. 

 In fig. 93 is shown an arrangement of a roof. The rafters are notched 



FIG. 93. 



at the lower ends to fix into the wall-plates ; and to prevent them from 

 separating or pushing out the walls, a tie is put in, as shown at e. The 

 sizes of the timbers for such a roof may be thus : 



Rafters a a, d d, . . 9 inches by 3J inches. 



Tie e, ...'., 6 3 

 Wall-plates b c, 4 3 ' 



Fio. 94. 



In fig. 94 is shown a roof suitable for a long span, say from twenty- 



