Notice ID
af702b0acaa3bc6071050cc1fd409e08
Fabricate 400 1500 lb concrete sinkers according to specifications and drawings to USCGC Greenbrier Natchez MS The USCGC Greenbrier has 30 forms available for use and may be poured on site References American Society for Testing and Materials ASTM A36A36M Standard Specification for Carbon Structural Steel C15096 Specification for Portland Cement C3393 Spec for Concrete Aggregates C14390A Test Method for Slump of Hydraulic Cement Concrete C3996 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 62192D 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 March 01 2001 Contractor shall furnish all labor materials transportation and equipment to fabricate and deliver 400 1500lb concrete sinkers to the USCGC Greenbrier 44 44 L E Barry Road Natchez MS 39120 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 readymix 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 12 inch to No 4 sieves or sizes No 67 graded from 34 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 Officers 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 Officers 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 oneinch 1 diameter round stock steel which shall be placed in the concrete and used to life 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 Request for quotations are available by contacting Mr Frank Johnson 3145393900 x369
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