Treating strengthens exterior glulams

/\', r) L\\r\rrr rr tirrber has bcen on thc.iob fbr morc \Ithrn l hundred ycars. Whatcvcr the nced from long clear spans tcl soaring archcs glulams pcrlilrn-r with strength ancl beauty.

But there's lnore to this cngineercd wnocl product than what meets thc cye. For cxterior applications ini.oli,,ing ground contact ancl exposurc to \\,ater ctr dampness. glulams can be pressurc treatecl. uhich also provides protcction against uood-clestroyin-g insccts and fungi.

"On thc residcntial side ol'thc market. treated glulurns have bccn -erowing nrarketsharc when traditional treatccl southcrn pine lumbcr and beants do not make the span." says Kcrlin Drakc. r'ice president of marketing at Anthony Forest ProclLrcts. El Dorado. Ar. "-fhcy have bccn a main stay in thc non-resiclcntial markct lirr bridges. ptrk sheltcrs, and in cxterior cnvirctnmcnts \\,here treatecl structural rnembers arc required."

Glulams are alsc'r enl'ironmentally l'riondly. Not only are they manufuctured froln a renewablc resourcc smalldiar-neter trees but thcy also has lowel embodied energy tlran reinfbrcccl concrctc ancl steel.

Anthonl tfcats its Pou'er Prcserved glulams and colurrrns with copper naphthenatc, carliccl by mineral spirits. Drake says that the aclvantages of oil-based treatntcnts is tl'rat "there is no su,ellin-g o1'the r.vood l'iber, less chccking. cupping and tu,istin-e. and there arc no strength reduc- tions for the beams, unlike lumber and beams treated with water-borne preservatives."

When glulams are used in visible, interior applications -exposed beams, trusses, and arches-premium grades are specified, to highlight the beauty of real wood. However, using these same beams outside, especially in applications that require water and insect resistance, can be a problem because pressure treatment imparts a green color.

As a solution, Rosboro now offers a treated version of its X-Beam glulam. Constructed of coastal Douglas fir, the treated version is protected

Two Coat Exterior Prime 0ur two-coat process starts with an aLkyd seater to block tannin migration, fottowed by a high-performance acrytic primer. The result: RESERVE quatity, inside and out.

Superior Wood

Made of qual.ity, ctear, finger-jointed Western Red Cedar or Redwood, these products are naturatl.y designed for exterior use-both species are ideaI for endurinq extreme weather.

Surfacing + Sizes + Lengths

RESERVE products come in a wide range of sizes, Lengths and finishes. Whether the project calls for 51S2E or S4S, we offer

Lengths ranging from 16'to 20' Pattern stock is atso avaitabte.

1"x4 - Lx12 s/ax4 - s/ax!2

2x4 - 2xt2 with Hi-Clear II, a clear industrial wood preservative that leaves the wood an attractive honey-color, but protects against decay, mold, bacteria, and insects-including the Formosan termite.

"The industry has been waiting a long time for a product like Treated X-Beam," says David Smith, sales manager at the Rosboro, Or., company. "It not only offers a pleasing aesthetic for highly visible applications like decks, porches and balconies, but also nicely consolidates our product lines for easier specifying."

The Finest Stock, The Best Coating

Our Siskiyou Forest Products RESERVE line is specially manufactured and treated to create the highest quality product available. Using state-of-the-art application and curing equipment, our premium Western Red Cedar and Redwood stock is made to last for many generations. We are proud to offer a beautiful, durable product that is ready for installation and final painting the moment it reaches the craftsmen.