I(|(lI( F(|R THIS BRANII When You Buy PRESSURE TREATEII LUMBER

efficiency of the plant.

"We simply want to be good neighbors," he declared.

The tanks were designed by Western Knapp Engineering Company of San Francisco. They were fabricated and erected by Consolidated Western Steel Company. Much of the construction work was done on overtime in order to take advantage of good building weather.

Coming Soon: Lumber Stress-Raled by Mochine

Mechanically stress-rated lumber will be coming into the market soon. With machines per{ected and soon available to the mills, the Western Pine association at Portland has just published Amended Supplement No. 3 to the 196I Standard Grading Rules, covering more fully the stress-rating of lumber by mechanical means.

A table showing the correlation of bending stress and stifiness is provided in the new supplement. The relationship of these "f" and "E" values is given at nine different stress levels. Four other strength properties are also listed in their accepted relationship to the others. The table applies to all species.

The rule provides that lumber stressrated by machine must be marked by the machine, and the stamp will show the Association trademark, mill number or name, species, and stress rating. Jurisdiction over the system is vested in the association's grade inspertion service.

Mechanical stress-rating of lumber is announced as an alternate system to be available along with the visual method of grading lumber for load-bearing use.

lumber GqlTokes

A Flyer ot Flying

Monica Martin, of the Marquart-S'olfe office in L.A., and her husband have bought a S-place, full panel Cessna airplane.

They started dual instructions and Monica soloed March 23. They are continuing the lessons so they can pass the Private Test.

But Monica, remember, don't be a wom€n driver up there !

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