Hi all &#; I&#;m a bit confused by the choices of different types of EPS and XPS foam, where the variable is PSI rating. If we want foam on the roof I assume that it needs to withstand workers &#; or myself &#; occasionally walking on the roof. What PSI rating is adequate for, say, a 250 lb worker walking or standing?
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What I mean is how many square inches do you use to estimate this? I&#;m having visions of heel strikes and video-recorded running shoe fittings&#; &#; If we assume a 250 lb worker I assume that they can create a load much greater than 125 lbs per shoe area, when their weight is on one leg, heel strikes, etc.
I see very low PSI ratings for EPS (e.g. 20 or 30 PSI at the most) compared to XPS (up to 100 PSI). Are the EPS numbers good enough for heavy workers?
And what if a load exceeds the PSI rating? What are we talking about as far as damage? Dents in the foam? Erosion of R-value?
Thanks for your help.
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Durafoam DK Series -
UL Listed Closed Cell Sponge Rubber & Plastic Foam.
Only The Durafoam Dk Series Is:
U.L. Recognized for all 5 Hardnesses to UL 50E, UL 157, UL 508, UL 94HF-1
All 5 Hardnesses are also listed To Canadian Listing CAN/CSA C22.2 NO. 017-92.
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UL Listed EPDM/NEOPRENE Closed Cell Rubber Blend, Durafoam&#; DK Series (DK111, DK, DK, DK, DK)
UL Recognized DURAFOAM DK SERIES CLOSED CELL RUBBER is the only full line of ASTM SCE 41 THROUGH SCE 45 that is recognized to UL 50, UL 157, UL508, UL 94HF-1, and CANADIAN LISTING CAN/CSA C22.2 NO. 017-92
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COLOR BLACK BLACK BLACK BLACK BLACK DENSITY (PCF APPROX.) 6 +/- 2 6 +/- 2 9 +/- 2 10 +3/-2 13 +/- 4 POLYMER See Note B: NEO/EPDM POLYMERIC BLEND NEO/EPDM POLYMERIC BLEND NEO/EPDM POLYMERIC BLEND NEO/EPDM POLYMERIC BLEND NEO/EPDM POLYMERIC BLEND ASTM-D--67 & 68, GRADE # SCE 41 SCE 42 SCE 43 SCE 44 SCE 45 ASTM-D--91 & 07 SAE J18-R7/92 2C1 2C2 2C3 2C4 2C5 COMPRESSION SET, SUFFIX B2 25% MAXIMUM PASS PASS PASS PASS PASS COMPRESSION DEFLECT @ 25% DEFLECTION 2 - 5 PSI 5 - 9 PSI 9 &#; 13 PSI 13 &#; 17 PSI 17 &#; 25 PSI WATER ABSORP. BY WEIGHT MAX, ASTM MTHD. 5% (10% ALLOWED) 5% (10% ALLOWED) 5% (10% ALLOWED) 5% 5% TEMPERATURE RESISTANCE Low ºF/High ºF See Note A -40/+250 -40/+250 -40/+250 -40/+250 -40/+250 ELONGATION % Min 150 150 150 150 150 HEAT AGING, 7 days @ 158ºF) +/- 30% MAX CD CHANGE PASS PASS PASS PASS PASS TENSILE STRENGTH Min. 75 psi 100 psi 100 psi 125 psi 150 psi OZONE 20% STRESS, 72 HRS @100 PPHM, ASTM-D- -94; -91; GMM; GMP; CHRYSLER MSAY 527 PASS PASS PASS PASS PASS OIL RESISTANCE, FLUID IMMERSION E1, 7 Days @ 23ºC or 74ºF PASS PASS PASS PASS PASS FLAME RESISTANCE TO UL 94 HF1, FMVSS302 PASS U.L. #E PASS U.L. #E PASS UL #E PASS UL #E PASS UL #E FLAME RESISTANCE TO CANADIAN CAN/CSA C22.2 # 017-92 PASS U.L. #E PASS U.L. #E PASS UL #E PASS UL #E PASS UL #E U.L. 50E, U.L. 157, & U.L. 508 PASS U.L. #JMLU2 MH PASS U.L. #JMLU2 MH PASS U.L. #JMLU2 MH PASS U.L. #JMLU2 MH PASS U.L. #JMLU2 MHNOTE A: For temperature resistance lower and/or higher than the above figures, please contact technical assistance. Under certain
conditions, values greater than -40/+250 are possible.
NOTE B: Monmouth&#;s materials are manufactured to ASTM-D- and other related ASTM Standards. ASTM specifies physical performance, notpolymers nor polymer content. Monmouth&#;s lab is equipped to certify to all the ASTM specifications either customer specified or on our physical properties chart. If a particular polymer or polymer content is required, please contact John Sr. with your specific requirements.
DISCLAIMER: To the extent that the above product information is derived form sources other than Monmouth Rubber, Monmouth Rubber is substantially, if not wholly, relying upon the other source(s) to provide accurate information. Information provided as a result of Monmouth Rubber&#;s own technical analysis and testing is accurate to the extent of our knowledge and ability, using effective standardized methods and procedures. Each user of these products, or information, should perform their own tests to determine the safety, fitness and suitability of the products, or combination of products, for any foreseeable purposes, applications and uses by the user and by any third party to which the user may convey the products. Since Monmouth Rubber cannot control the end use of this product, Monmouth Rubber does not guarantee that the user will obtain the same results as published in this document. The data and information is provided as a technical service, and the data and information is subject to change without notice. When considering the above product as a competitive equivalent material, please keep in mind that some materials have unique physicals that are not part of the recognized industry specifications and standards. Therefore, customer sample evaluation and approval of any substitution is suggested.
Monmouth Rubber will supply free of charge evaluation & testing of its materials to assist customers in their evaluation. For technical evaluation and support, please contact John M. Bonforte, Sr., 1-732-229- Ext 112, or John Sr.
Durafoam DK Series UL Chart [PDF Download]
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