Document rBrGb91n0bJdEvL4rNXaJLg3V

PHILIP^ 'PMH.CAYCO" A SjJ^ THE PHILIP CAREY1 MFG. COMPANY CINCINNATI. OHIO 45Z15 AREA CODE 513 61-3000. BUILDING MATERIALS INDUSTRIAL PROOUCTS April 30, 19614. received STRUCTURAL section hr. Richard Barker Br.~ineering Dept. Reynolds lietal Co. coOl Broad Street Bichnond, Virginia MAY 4 1964 ENGINEERING division Dear hr. Barker: Dhls will confirm the information I save- you on long distance telephone today when you questioned the use of k.2 Corrugated Asbestos on roof spans greater ohan the maximum published by our company and all other nanufacturers of corrugated asbestos. You stated you had an existing job on which the spans were ip110,L and were interested in covering itwith corrugated asbestos. I am personally familiar with jobs on which cor rugated has performed very satisfactorily on roof spans even greater than a Ij.'lO" that you have in your build ing, however, as manufacturers we will not .recommend using the materials beyond the spans published nor would we knowingly furnish materials for use on spans above our published limitations unless we have a letter from the user acknowledging the fact that they %re taking all responsibility and wiil assume any liabilities in doing so. The letter should further state that they would absolve our company of all responsibility for the per formance of the corrugated asbestos since the material is being used contrary to our published recommendations. All manufacturers have maintained a maximum spacing of U'6" since corrugated-asbestos is not a shockresistant material, and while the materials could carry the safe loads with a very good safety factor on longer spans, it is not possible to measure shock and in order to assure satisfactory performance of corrugated asbestos it was thought best to retain all^ spans to [l'6" maximum. Ro*F PROOUCTS IN THE "WORLD'S FAIR HOUSE" in PLAINTIFFS EXHIBIT " RMC-447 A 'T con't... TXTINER RMC0083288 Mr. Michard Barker April 30, 19oii Pane 2 If the materials are used beyond that published limitation and an accident should occur, there is some question as to whether or not the liability insurance coverage would remain effective in case of an accident. There would be quite a bit of embarrassment involved to -whoever specified the use of the material beyond the published recommendations and the responsibility would be pointed at the party who recommended its use, the organization using it, and even the manufacturer that supplied the materials, etc. under those circumstances, the Philip Carey Manu facturing Company would definitely recommend that the existing purlins be relocated to be within the requiromonts of the recommended limits for Il.2 Corrugated .'.2 06S u0S As an alternate suggestion, should there be some reason why these purlins cannot be relocated, it may be more advantageous to consider adding intermediate members to cut the spans in half - namely 2'3" - in which case it would then be practical to use our light weight 3/16" corrugated asbestos,-provided none of the spans would then be over 2'6", as 2'6" is the maximum spacing recommended for that product. Ordinairly, light-weight corrugated is not used in industrial construct ion ,since it is not economically sound to anticipate location of steel purlins on 2'6" spacings and girts for sidewall use on 3'6" sracin^s. It may, however, in this case, prove practical to con sider it if it would not be possible to relocate ftvfr add a few extra purlins to make the current job meet the 4'o" maximum spacings. Cl-IW/kah TXT1NER RMC0083290