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fiTOISTURE.RESISTANT TYPE DOUGTAS FIR PTYWOOD

Horbord ir the irnprovcd rloirturc-rqrl3lanl type Douglor ffr plywood ot Commerciol Slondord quolify. lr ii mcnufocturcd by thc lqterl improvcd hotplote method. lhir ir the lypc o{ panel notctiol poPulorly ured for wollboord, coblnet wort, sheothlng ond other home conrtruclion ond for ufiliry. psrporcs'

Gionl-size SUPER-Hqrbord ponelr ore produced to order by ioining slondord-size ponels with q speciol scorf ioinl. Any length Giont ponelt moy be produced with o moximum width of 9 ft. unsonded [8 ft. 6 in. sonded I The speciol scorf ioint develops the full strength of the ponels which ore ioined. The Giqnt sizes exlend lhe usefulness of the product qnd hove solved mony con3lruction problems in lhe morine, roilwoy, ond olher lronsportolion fields. For exomple, the Giont ponels orc used for plonking qnd decks of boots of mony sizes which qre conslrucled lor pleosure or work seryice. The sides, floors ond roofs of buses, trucks, lroilers ond roilwoy cors copilolize upon lhe odded strength ond eose of fobricotion of the lorger units of SUPER-Horbord. likewise, designers of olher types of conslruclion hove been quick to oppreciole lhot similor unittype conslruclion reduces lhe number ond bulk of froming members; hence, it increqres usqble cuboge qnd reduces over-oll weight.

Harborite Giant Panets

Gionf ponels of Horborile ore olso produced lo order. fhe some bo:ic scorf-ioint lechnique permitting o borely perceptible ioinl-line is u:ed lo produce lhe lorge size plostic-foced pcnels.

Fir Plywood Production

(Continued from Page 30) stand the rigors to which the ordinary house is subjected -and a great deal more. But builders, as a whole, have been remarkably quick to learn correct applications of the miracle wood. When we remember that the first widespread use of plywood in home construction came only ten years ag'o, it is gratifying to see how intelligently the product is handled by most construction people.

The Douglas Fir Plywood Association was organized in its present form in 1936 in Tacoma, Wash., to promote the use of the product, carrv on research and maintain the high standards of the product.

At the present time, with the demand for plywood continuing to exceed output, the emphasis on promotion'has been shifted to research in an intensified effort to develop even finer plywoods, and to find new markets for the future. Early in June, at the annual meeting of Douglas fir plywood industry representatives, the D.F.P.A. illustrated more than 1000 plywood uses-many of them in fields previously overlooked as markets for the miracle wood.

Rigid standards for the difierent types and grades of Douglas fir plywood are set forth in the U. S. Department of Commerce Commercial Standard CS45-47, and the plywood industry maintains a corps of inspectors in the plants to certify the panels for each category.

Plywood has been going to the ,city in large quantities for homes and commer.cial buildings, it has been going to sea in boats ranging in size from dinghies to ocean-going tuna clippers, but it was brought out at the industry meeting that plywood also is ready to serve on the farm as well. Because of its strength, ease of handling and complete weather protection qualities, plywood is ideal for many rural needs-silos, barns, hog houses, stables to troughs and chick brooders.

One of the most significant developments in the plywood industry is the increasing production of Exterior type ma_ terial in proportion to Interior panels. Only five per cent of the plywood produ,ced was of the Exterior type in 1941. Last year Exterior production accounted for %/o oT the total output. Exterior footage increased 30/o last year over the figure for 1946.

Twenty-nine Douglas fir plywood plants now have 50 hot presses or high frequency presses capable of setting the

United States Fir Plywood Production 1925 -1947

square feet of Douglas Fir plywood in 1947, and will produce over 3@ million in 19€. Western Pine plywood totaled 75 million feet in 1947, and 1948 will show an increase. It is likely that the grand total of Fir and Pine plvu'ood produced in 1948 will reach the huge sume of 2,400 million square feet.)

phenolic resin glues -which bind the plys for Exterior panels. Last year 11 of these presses were installed, indicating a further rise in Exterior plywood production.

Calpella Plywood Corp. Now Operating

The Calpella Plywood Corp., which is manufacturing sliced vertical grain Douglas fir plywood at its factory near Ukiah, Calif., will also make hardwood plywood at this plant later this year.

Mahogany, oak and madrone sliced plywood panels will be produced. The mahogany panels will be made from cants shipped in from the Philippines.

Adrian Levy, president of the concern, makes his headquarters in the Mills Building, San Francisco. Sherman Cornblum, formerly in the plywood jobbing business, is secretary-treasurer and general manager. The company has applied for membership in the Douglas Fir Plywood Association.

in natural grain with satind of 1000 uses. Etch wood is Send for descriptive f older.