23.1 - 1116 W 6th St - mortar report — original pdf

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Building Diagnostics 835 W 6th Street, Suite 1410 Austin, Texas 78703 (512) 474-0400 www.BuildingDX.com An ABB Company August 14, 2024 Flintco LLC 317 Grace Lane, Suite 150 Austin, Texas 78746 Attention: Mr. Lance Larson, DBIA Subject: Project Director REPORT OF FINDINGS Clarks Village – Masonry Façade Shoring Site: 1116 W. 6th Street, Austin, Texas ABB Project No. 23-8401.01 Building Diagnostics, an ABB Company (ABB) is pleased to present this report of our findings regarding the above referenced project in Austin, Texas. The existing mortar at 1116 W. 6th Street is in poor condition making the masonry unsuitable for shoring and the future use as an entry façade to the new development. We recommend deconstructing the wall, removing the existing mortar from the brick, and rebuilding the wall with units from the existing building. 1. On August 6, 2024 we probed the mortar with a hammer drill and found mortar with the consistency of powder within the joints. The shoring design and future use relies on a code minimum bond strength of 30 psi. The existing mortar provides insufficient bond strength. 2. The masonry was installed with poor workmanship. Many of the head joints observed are not filled; the head joints only have a face shell of mortar. Additionally, the bed joints are underfilled and lacking mortar across the full width of the masonry units. 3. The masonry units used at the time of construction are known as pavers, because they lack the holes found in traditional brick. Due to the lack of holes, the bond strength between the mortar and brick is critical. Consultants Specializing in Durable Performance of Buildings and Materials Flintco LLC August 14, 2024 Page 2 We look forward to continuing to serve as your consultant. If you have any questions, please do not hesitate to call. We will follow up with you soon on this report. Sincerely, Building Diagnostics, Inc, An Allana Buick & Bers Inc Company Brett T. Fagan, P.E. (Texas) Principal BTF 8/14/2024 This document contains an electronically-applied seal, authorized by Brett T. Fagan Texas P.E. #90932. Texas Cert. of Reg. No. F-10471.