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FINGER JOINT
DEFINITION Wood processing technique that consists of cutting finger profiles into the ends of wood pieces and joining them into longer pieces with an adhesive.
HISTORY • First developed in the 1920’s in the automobile industry • But in 1970’s, developed in Canada for the glu-lamination industry • Now, it use for both structural and non structural - The fingers are 20 -60 mmlong - Pitch is 6.2 – 12.5 mm - Width is 1-2 mm
Adhesive / Resin????? • • • • • •
PRF MUF UF PUR EPI PVA
Importance of Finger Joint • Able to utilize short timbers to produce longer length timber • Upgrade lumber to higher strength class • Improve quality and appearance of wood ??? • Produce straight timbers • Able to withstand heavy load • Reduce wood wastes and rejects’ • Able to use unpopular timber species with small diameter
Importance of Finger Joint • Able to use thinning from timber plantations • Address to lumber shortage using residual wood from mills and logging which are otherwise wasted • Help in recycling wood waste • Make additional profit by increasing the economic value of the wood
Uses • Glulam?? • LVL??
Thank You (English) Terima Kasih (Malay) 谢谢你。(Chinese) Merci (France) спасибо (Russia) Vielen Dank (German) ( ﺣﻣد اﻟﻠﺔArab) Thank you for your attention !