Fabricate 500, 1000 lb concrete sinkers according to specifications and drawings to USCGC SANGAMON, East Peoria, IL. The USCGC SANGAMON has 28 square breakdown forms available for use and may NOT be poured on site. References: American Society for Testing and Materials (ASTM): A36/A36M, Standard Specification for Carbon Structural Steel C150-96 Specification for Portland Cement; C33-93, Spec. for Concrete Aggregates; C143-90A, Test Method for Slump of Hydraulic Cement Concrete; C39-96, Test Method for Compressive Strength of Cylindrical Concrete Speciments; American Concrete Institute (ACI) ACI 318, Building Code Requirements for Reinforced Concrete. Applicable Drawing: USCG CEU DWG. 62192-D, Standard Sinker 8th District (oan) Sheet 1 of 4. Requirements: Releasing agents - USE only environmentally safe releasing agents when pouring sinkers. Contractor shall not pour directly on asphalt or concrete. Tarpaulins or plastic sheeting must be provided to cover all asphalt and concrete during on site pours. All pours shall be made between the hours of 0730 to 1530. Customer shall be notified at least 72 hours in advance of delivery or start of work. Delivery of all sinkers must be made by May 14, 2004. Contractor shall furnish all labor, materials, transportation and equipment to fabricate and deliver 500, 1000 lb square sinkers to the USCGC Sangamon, Foot of Washington Street, East Peoria, IL 61601. No deliveries are to be made on Saturdays, Sundays, or Federal Holidays. Cured sinkers shall be within -3% or +10% of the design weight. The contractor shall replace any sinker found to be out of tolerance weight at no additional cost to the Government. A ready-mix concrete must be used and meet the following requirements. The mix shall be designed to provide a minimum compressive strength of 3000 psi at 28 days. Tests shall be made at the discretion of the Contracting Officer. Cured concrete shall weigh no less than 140 pounds per bulk cubic foot of sinker. Portland cement shall be in accordance with ASTM C 15, Type I or II. Fine aggregate (sand) shall be in accordance with ASTM C 33. Course aggregate shall be Class 4M, size No. 7 (graded from 1/2 inch to No. 4 sieves) or sizes No. 67 (graded from 3/4 inch to No. 4 sieves) in accordance with ASTM C 33. The slump of the concrete shall be at least 2 inches and will not exceed 5 inches as delivered. The slump test shall be in accordance with ASTM C 143. Samples for slump determination will be taken from concrete during placing in the forms. Slump test may be conducted at the Contracting Officer's discretion. Compressive Tests (as required) of specimens shall be in accordance with ASTM C 39. Tests will be made at 7B and 28 days from time of molding. Six specimens will be broken from each batch of concrete tested (3 at 7 days and 3 at 28 days), and their average strength represents the strength of the batch. Compressive test may be conducted at the Contracting Officer's discretion. All workmanship, placement and curing shall be in accordance with the applicable sections of ACI 318. Concrete shall be uniformly distributed within the forms by the use of vibrators or other means. Finished concrete shall be free of voids, planes or discontinuity, or areas of honeycomb. All concrete sinkers shall be allowed to cure for a minimum of three days before they are moved or stacked. Contractor shall supply one-inch (1") diameter round stock steel, which shall be placed in the concrete and used to lift the sinker. The steel shall meet the requirements of ASTM A36. Additionally, the lifting eyes shall be shaped and positioned as shown on the applicable drawings. TO REQUEST A QUOTE PACKAGE, CONTACT EVA JOHNSON VIA EMAIL AT
[email protected] INCLUDE COMPANY NAME, ADDRESS, PHONE AND FAX NUMBER.