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order is entered into production. <br />• Adherence to project milestones as outlined in the critical date schedule is required to <br />meet requested shipment dates. <br />• Our quotation is based upon the following concrete specifications: (if applicable) <br />1) Floor mounted chairs must be 3" thick free from obstructions for top 1-1/2". <br />2) Riser mounted chairs must be 4" thick free from obstructions for 2-1/2" from riser face. <br />3) Riser to be plumb + or - 1/8". <br />4) Normal weight concrete to be compressive strength 3000 PSI (structural concrete). <br />5) Structural light weight concrete is acceptable if it is 2500 PSI minimum and weights <br />90-115 pounds per cubic foot. <br />6) Screed is not an acceptable anchoring base. If screed dimension exceeds 1", special <br />installation hardware and procedures may be necessary. <br />Any deviations from the concrete conditions mentioned above may result in additional <br />installation charges, the need for alternative anchoring, etc. Installers need to be able to <br />easily drill through the screed to reach clear structural concrete. <br />• Our quotation is based upon the following wood specifications: (if applicable) <br />1) Minimum of 1-1/2" thickness <br />2) Construction: <br />A. PLYWOOD: (Minimum Requirements) <br />C-DX underlayment; Plug and touch sanding; Tongue and grooved <br />B. FLOORING: Sub floor plus hardwood (tongue and groove) finish flooring. <br />3) Method of Fastening: No. 14X2" Hex washer head S.M. screw <br />NOTE: Wood construction for riser mounting is not recommended. <br />Any deviations from the conditions mentioned above may result in additional <br />installation charges, the need for alternative anchoring, etc. <br />• Pricing is valid for 90 days from date of issue. If purchase order is not received within 90 <br />days of this quote date Irwin Seating Company reserves the right to reissue the quotation <br />with adjusted pricing. <br />If you have any questions, please contact your Irwin Seating Company Project Administrator for <br />clarification. <br />IRWIN SEATING COMPANY <br />3oarri Of <br />Diane Schildknecht <br />Territory Sales Manager <br />