Bricklaying System (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...high. 487 The man on the trig is not expected to carry his trig over two courses above the line. While he must plumb it with a plumb-rule, he must also see that the man on the hauling end of the line sights it for in and out, and also for height. 488 The trig shall be a loop about 6 ins. long, so that the line will haul through it. See Fig. 107. 489 Never make the trig fast to the line. 490 Use a brick on edge to hold the trig in place, and see that the line at the trig is exactly at the top edge of the brick. 491 All brick except trig and lead brick must be laid so that they do not quite touch the line. Fig. 108.--Correct Method of Splicing the Line. 492 Mason's linen line is too expensive to replace every time it is cut, and even when spliced instead of knotted it is not quite so accurate to lay to and the splice may crowd it off the wall slightly. 493 Men must, therefore, use wire nails and not cut nails to hold the line. These nails should be flattened so as to go into a close vertical joint of the brickwork. See Fig. 107. 494 The nails, splice and trig must be made exactly as shown in Fig. 107. 495 In case the line parts on account of being worn, or by being struck by a trowel, it must be spliced, as shown by Fig. 108, by opening each end in three places and putting each end through the three openings in the other line. It takes more time to do it this way than to tie a knot but it hauls enough more accurately to the line to warrant the time spent. 496 Haul the line to the bottom of all projections and not to the top. 497 The introduction of Portland cement and the recognition of the value of coarse sands has lead to a general tendency toward larger joints in brickwork. 498 The larger the joints the easier it is to secure filled joints and...