4937 SEA BREEZE WAY 2017-01-13 - Laserfiche WebLink

• FORENSIC ACTION The original construction documents are silent relating to the required yield stress of the "Williams stress rods". We have sent a photo and the original construction documents to Williams form engineering company in hopes that they could forward us historical information of their products available circa 1993. We are currently poised to receive this information, although have not received to date. Therefore we recommend that a coupon of one of the failed rods be sent to a laboratory for a pull test to determine the yield stress of the bar. We understand that the company below can perform this scope of work: Northwest Laboratories of Seattle, Inc. (206) 763.6252. Optionally, we can send a coupon of the bar to Williams Form Engineering Corp. for confirmation that it is their product and coordinate with them an appropriate equivalent. RECOMMENDATIONS All of the existing stress rods should be exposed to determine their current structural state. All of the stress rods that were found to have failed as logged by the geotechnical engineer, should be repaired per the direction of the structural repair documents dated August 13`h, 2015 — sheet S3.2. Any additional stress rods found in a similar corrosive state should be repaired as well. All of the lagging members that have failed as logged by the geotechnical engineer, should be reinforced per the direction of the structural repair documents dated August 13'h, 2015 — Sheet 53.2. DISCLAIMERS Our review does not constitute a design, nor is it all inclusive and the responsibility for the structural design remains with the registered design professional. Sincerely, Benjamin McCann P.E. 08/13/2015 Page � 2/� l