Document gDYd1X796wBq5a0GM5BgOw32q

Sprayed Mineral Fiber Manufacturers Association, Inc. SUITE 2300, ONE WALL STREET, NEW YORK, N. Y. 10005 J. ?. VHLHALEN. PE3IONT O'oieed Sates Miami Piodutu Coaptar A. E. BINCER. VIC* Ptisnccr Smidi JCiaxier Coatpesr 06iabr ft, 1966 J. H. V7TTXOP. S*c**ta*t BaMwia-Ehm-HUi. lac. H. I- LEVINS. TttASUitn Aibacoeptif Corponaoe Mr. Jack Bene Underwriter#* Laboratories, Inc. P. a Box 247 Northbrook, Illinois Re: Method of Determining Tire Resistance Ratings of Loaded Beams Dear Jack: At our meeting of December i, 1966, our association voted unanimously to recommend sad aggressively support the principle, that a temperature criteria be adopted for all structural beams. Wo feel that this should apply to all situations where a beam is used and no beam should be rated as part ctf aa assembly without use of a temperature criterion. We are not any recommendation as to the actual temperature criteria to be used. We ere happy to leave this to ths experts. We went you to know that you will have the full support of our association and its individual members in this connection. Sincerely yours, ORIGINAL SIGNED. fil M. L1EF.E ML/jb Morris Lieff Chairmen, Technical Committee cc: Chairmen,-Committee A5TM -5 Chairmen, Subcommitte L ASTM Committee/-3 J. P, Vorhelea B, Levine A, . Binger J.