DURABILITY STUDY In 1979, over 10,000 square feet of DURAGRID ® I-4000 1" (formerly DURADEK ® ) pultruded grating was installed in lieu of steel grating in the well bays and adjacent areas on Shell’s offshore platform Ellen. The platform was destined for the Beta Field off the shore of southern California. Now, with over 40 years of use, the grating continues to show an excellent return on investment for current operators, Beta Offshore. Anti-skid DURAGRID ® has always been known for excellent durability and the 40-plus year exposure on Ellen has had little to no effect on the grating. Even accidental sandblasting and paint overspray has not noticeably degraded the grating’s performance. Previous reports indicated that abuse from the platform’s SSV’s (surface safety valves) an

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