Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Wood consumption and requirement for the Pakistan railways.

Abstract

Data are presented for 1976-86 on the number of coaching vehicles of different gauges owned by the Pakistan railways, the length of railway routes and tracks, and revenue and expenditure. A survey was done on wood consumption by the 3 railway units of the railways in 1982-87, viz. the carriage production factory at Islamabad, the carriage repair workshop at Lahore, and the route and track department at Lahore. Since 1982, no imported wood has been used for these purposes. Total annual wood consumption was between 2926 and 9537 m3 for 1982-86, but increased to 18 944 m3 [?] in 1987. Carriage work uses hardwood while railway sleepers are generally softwood, although pre-stressed concrete is being used increasingly. The main species used for sleepers are deodar [Cedrus deodara], kail [Pinus wallichiana], fir [Abies pindrow], spruce [Picea smithiana] ans shisham [Dalbergia sissoo]. Preservative treatment is by pressure impregnation using a creosote/fuel oil mixture. Employment in the 3 railway units was 2216 persons in 1987, at 300 days each. A linear regression model was used to forecast future annual wood consumption, which is shown as rising from 14 266 m3 in 1988 to 36 745 m3 in 2000.