Whates New In Ptywood?

Panel Makers Continue to Up-Grade Product Quality; Introduee New Grades, Sizes to Meet Users'Needs.

The story of the phenomenal growth of the Douglas fir plywood industry is told with a simple syllogism: greater quality means more uses more uses mean more users . more users mean greater production.

Not to be overlooked is the underlying fact that a component part of product quality are the inherent properties of the material itself-large panel size, strength, rigidity, splitproofness, etc. These desirable physical characteristics have all contributed to plywood's widespread acceptance and demand.

Today, the quality of Douglas fir plywood surpasses that of the 1905 product just as today's 1,000-plus uses shade the first fir plywood's single use as a drawer bottom. Production, oT course, has been increased proportionately to supply ever growing usefulness.

Industry Quality Minded

Quality of product, consistently maintained and repeatedly improved to meet new performance standards, has brought plywood the widespread recognition of versatility and dependability.

And today, because of industry devotion to betterment of product, plywood is manufactured in accordance rvith more stringent performance requirements than ever be'NTERIOR.TYPE

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fore. Such are the panel prerequisites in the nerv Commercial Standard CS45-48 effective November 1, 1948. Under the new standard, plywood is, more than ever before in its history, manufactured in types, grades and sizes tailored expressly to meet the actual use requirements in its myriad applications.

New Grading System

Of special interest to lumber dealers is the new, simplified grading system called for by the standard. Under this system the outer or face veneers are known by simple ABC appearance designations. The A veneer, logically, is the highest quality. The B veneer is a new quality; it afiords a smooth, solid surface only somewhat lower in appearance than the A. Small defects such as tight knots and circular repair plugs are permitted in the new B veneer.

C and D quality veneers are structurally sound, although they have certain appearance defects such as restricted knot holes. Such veneers are intended for panel backs or for both outer plies of structural plywood such as sheathing rvhere appearance is not important.

Four New Plywood Grades

The introduction of the new B veneer makes possible trvo new appearance grades of plywood with both Interior

EXTER.IOR,.TYPE

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(B-D or sotid ry l'sidelnterior) (Shmthinglnrcrior) -

(A-D or PlyPonel Sound I Side) mffJJij-:Efml

(Sound 2 Sides Interior) mfMIfFE:o-FfAl

(Sound I Side, Solid Bsck ' lnterior)

PLY PAN EL is tha cll-purpose interior PIY' wod, for use where onlY one side of the ponel is io be fin' ished ond in view.

PLYBASE is c new grode, for use <r3 o bocking or bo:c mofcriol under coverings such os linolcum.

I NTER I OR.A.A is the grode of interior Douglos fir plywood formerly known os "Sound 2 Sidss"with bofh foces of highest oPPcroncc quolity.

(B-B or Solid 2 Side Interlor!

I NTER IOR,.A-B is o new grode, wirh foce of highest oppeoronce quolitY ond bqck of relqtivelY good oP' peorqnce quolity. ln monY cqses, lnlerior A-B con *rye use opplicotions formerly de' monding the use of A-A (Sound 2 Side) Pqnels.

P LYSCO R D is qn unsqnded conslruGfion ponel, ideol for roof sheqlhing, woll shething ond for subflooring. PLY FORM is the mulriple rE-us6 concrele form ponel, now monufqclured with iwo B (Solid) fqces.

(Sound 2 Sides Exrerior)

(A-C or Sound I Side Exterior) (Sound I Side, Solid Bock Exlcrlor)

PLYSH I EL D is q new grode nomc, identify. ing the mosf versofile single grode of plywood for the ex. terior siding of homec qnd buildings.

EXT.DFPA.A.A hos both foce ond bqck veneerg of rhe highest oppeoronce quolity. For use where oppwronce of both sidss of ponel is importqnt.

EXT-DFPA.A.B is o new grode, which in monY cqses will serye somewhqi the sme u3e purposes qs the "A-A" pqncl.

EXT-DFPA.UTILITY is q new grode, idml for fqrm slructures qnd olher ouldor use where highesf opperonce vqlue is nol mondqtory.

EXT-DFPA. SH EATH I NG is qn unsqnded conslruclion grode, monufoctured with com' plelely wolerproof odhssives'

EXT-DFPA.CONCRETE FORM is lhe concrels form ponel which moy be used qnd re-used until the wood is literolly worn owoy. Now mqde with both fqce ond bqck of the new B (Solid) veneer.