Treating strengthens exterior glulams

/-'l r.tro L,\NuN\lF.r) tirnber has been on the job for more \Ithan u hundred tears. Whatever the need-from long clear spans to soarln-c arches --elulams pcrform with strenqth ancl bcautt'.

But there's more to this en,eineered wood product thzrn what mcets the eye. For exterior applications involving ground contact and exposure to water or dampness, glulams can be pressurc treated. which iilso provides protecticln against 'uvood-dcstroying insects and fungi.

"On thc resiclential sidc of the n'rarkct, tleated glularns have bccn grou,in-u ntarkctshare whcn traclitional trcatcd southern pine lunrber and bearns do not n.rake the span." says Kcrlin Drake. vicc president ol'n'rarkcting at Anthony Forcst Proclucts, El Drtrado. Ar. "Thcy havc bccn a ntuinstay in thc non-rcsiclcntial ntarkct lirl bridgcs, park sl'rclters. and in cxterior cnvironmcnts whcrc {rclLtcd structural nrcmbcrs arc required."

Glulanrs are also cnvir<tnntcntully l'ricndly. Not only arc thcy rnanufacturcd 1l'onr a lencwablc rcsourcc sntallcliamcter trees but thc1" also has lowcr enrbodicd cnergy than leinftrrccd concrete and stccl.

Anthonl'treats its Power Preservcd glulan.rs ancl columns u"ith copper naphthenate, carricd by mineral spirits. Drake savs that the adi'antages of oil-based treatments is that "there is no swelline of the wood fiber, less checking, cupping and twistin-e. and there are no strcngth reduc- trons lirr thc bcurns. Lrrrlike lunrbcr and hcunrs tlcrtccl u ith u atcr-bornc prescrl itt ivcs."

Whcn sluirrnrs are usccl in visible. intcr-iol appl icutions - crposcrl bcar.t.ts. trusscs. and afches-prcnrir-rnr grades arc spccificd. to highlight thc lrcauty of r-crrl noorl Hor"cvcr. usins these sa nr c bea nr s outs irlc c spce ili l lv in applicatiorrs that rctpr irc walcr ancl rnscct resistlllce. cirn be- lr problenr ht'tltttse Ir'('\\lll'c l|L'irllllclll ittt|;111s ;1 grccl.t color.

As a solution. Rosboro rtou'o|trs a trcatecl Ycrsion ol its X llcanr glLr]unr. Constructecl ol' coastul [)oug]us tir. the trcrrted r cr.sion is l)fotectccl ri ith Hi-Clcar II. a clcar indLrstrial uoocl lrrescf\uti\c thlt lcarcs thc rvood an attractivc honct -eolor. but protccts asuinst clccly. rnolrl, bacteriu. anrl insects inclLrtling tltc Folrnosan tcnlilte.

"The inclustr',v hlrs bccn w'aiting a Iong tinrc Iirr ir pr.oduct likc 'l'realcd X Bcam." sal s [)ar icl Snrith. salcs nrirnagcr irt thc Rosboro, Or.. conrl)llnr. "lt not onlr ollcrs a plcasing ucsthctic lirl highll r isiblc applrcltions likc clccks. l.rorchcs ancl balconies. bLrt also nicclv consoliclatcs our pnrcluct Iincs lirr easier spccif'r'ing."

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