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CONFORMS TO DESIGN CONCEPT OFFICE:360.757.3121 <br /> ❑ CONFORMS TO DESIGN CONCEPT WITH FAX:360.757.3816 <br /> 4 REVISIONS AS SHOWN <br /> NON CONFORMING- REVISE AND RESUBMIT 663 Pease Road <br /> Burlington,WA 98233-3103 <br /> MILES THIS SHOP DRAWING HAS BEEN REVIEWED FOR GENERAL CONFORMANCE <br /> WITH THE DESIGN CONCEPT <br /> FABRICATOR/VENDOR OFE DOES <br /> H <br /> FOR CONFORMANCE WITH THE PO Box 280 <br /> SAND&GRAVEL DESIGN DRAWINGS AND SPECIFICATIONS ALL OF WHICH HAVE PRIORITY Mount Vernon,WA 98273-0280 <br /> OVER THIS SHOP DRAWING. <br /> By: Anne McAteer-Brown SE Date:10/29/ <br /> CT ENGINEERING, INC. 2019 Page 1of1 <br /> Monday,October 28,2019 <br /> Craig Skotdal <br /> Skotdal Enterprises,Inc. <br /> 2707 Colby Avenue,Suite 1200 <br /> Everett,Washington 98201 <br /> Project: Marquee Apartments <br /> RE: "Tower Crane"Foundation Submittal <br /> Mr.Skotdal, <br /> Miles Sand&Gravel Company has submitted the following mix to be used for the"Tower Crane Foundation" <br /> for the project listed above. <br /> This mix was recently used by Greater Seattle Concrete, Inc.at a project in the Everett area. <br /> We have submitted this mix to achieve 6,000 PSI 0 3 days. The proper curing methods must be followed in <br /> order to achieve this desired strength. Also to be noted 6,000 PSI @ 3 days is approaching mass concrete <br /> conditions due to the high heat of hydration due to the high sack content, heat that will be produced during <br /> the initial curing,and thickness generally required for a tower crane foundation. <br /> If 8,000 PSI @ 3 days is required it can be obtained by increasing the accelerator dose. With this strength <br /> requirement there is a high probability of thermal cracking if recommended mass concrete curing is not <br /> achieve in order to allow the temperature from the heat of hydration to stabilize before the forms are <br /> stripped and removed from the foundation. <br /> Please let me know if you have any other questions or concerns. <br /> Respectfully submitted, <br /> 411 <br /> Michael C. Craig Miles Sand & Gravel Company <br /> Quality Control Manager WWW.MILES.ROCKS <br />