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Hi, We've been asked by an existing client to perform an analysis of any energy savings as a result of an on-going curtain wall sealant replacement project. We propose to perform ASTM E783 air leakage testing before and after sealant repair to obtain a net air leakage reduction. We are...

We are looking to repair and/or replace a wood-framed roof bearing on unreinforced terra cotta block. A sketch of the approximate existing condition is below. Current attachment is via galvanized tire wire. I hesitate to specify any of the commercially-available framing connectors as they...

Hi, We've been tasked with providing a new connection where a section of the existing spandrel panel is to be removed to provide access to a new, adjacent stair tower. The connection will need to be anchored into the 9"-wide cut face of the spandrel panel. Given the narrow section and factored...

Thank you both for the info

Hi, We had a Contractor cut right through a #9 bar in a beam under repair. The bar is cut relatively near the existing lap. Since development and lap splice lengths are rather significant for the large bar, we are considering a coupler to join the cut ends. What design considerations and/or...

Hi, Can anyone provide guidance on through-bolting two steel plates to the side faces of a reinforced concrete section? I know I need to consider the bolts in double shear, bearing of the bolts against the plates, and bearing of the bolts on the concrete. However, do I consider the bolts...

It is unclear if the (considerable) reinforcement that has been cut is just carry-over detailing or not. Thus, the desire to provide the same level of reinforcement. A section through the wall at this location is below.

We have been tasked with providing a strengthening design for a vehicle barrier wall that was previously cut to increase site lines. Both flexural and shear reinforcement were cut. Right now we are thinking about using either epoxied and bolted steel plates on each side or a channel to cap the...