TAR SEALING

Dominion, Volume 22, Issue 61, 5 December 1928, Page 10

TAR SEALING

GANG IN FULL OPERATION Summer temperatures now mean better streets. Tar-sealing can be done at any time almost, but good tarsealing can only be satisfactorily done when the thermometer is registering over 60 degrees Fahr. In this sunny weather the corporation sealing gang can get through a moderately long street in a day. It is all done by good organisation and a gang that knows its job and works steadily. This the corporation has succeeded in doing. The gang consists of a dozen men. The tar-boiler (on wheels) is moved on by a tractor. From the boiler are two one-inch leads, each ending in a spray, which shoots out the disintegrated tar at a pressure of 401 b. to the square inch. Each spray is in charge of a man, the two dividing up the breadth of the street between them. The rest of the gang follows the sprays with supplies of half-inch metal, which is scattered immediately over the tarred surface. A few minutes later the roller comes along and irons it all out —and the job is done. It should be mentioned that in the first instance the whole of the road surface is swept clean, so that the tar has a clean, hard surface of wellsolidified macadam to grip. Some two or three months afterwards, the gang returns to the tarred roads, and administers. another coat of bitumen. This gives a smooth resilient surface that may last for two or three years where the traffic is not too heavy or insistent.

The sealing gang attended to Majoribanks Street on Monday and Roxburgh Street yesterday. Brougham Street will be put in hand to-day.