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Steel Structure Trivia: Nodes at NASCC
Posted by Tasha Weiss on November 22, 2013 at 1:00 PM.

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Here’s MSC’s special November NASCC Steel Structure Trivia question! The above photo shows one of the three, massive cast steel nodes - engineered, detailed and supplied by Cast Connex (an AISC member) — that connect three, 70-ft-tall architecturally exposed structural steel (AESS) “delta frames,” which suspend an 11-story reinforced concrete office tower above two heritage structures as part of the Queen Richmond Centre West building project in Toronto. During NASCC: The Steel Conference, attendees have the opportunity to attend a construction site tour and presentation that will focus primarily on the design and construction of the delta frames featuring the cast steel nodes. Your trivia question is: How many pounds does each identical cast steel node weigh? Photo: Courtesy of Cast Connex 

 

Answer:

 

Each cast steel node weights 35,000 lb (or 17.5 tons)! Congratulations to our winners: Troy Ernst, a senior estimator at AISC-member fabricator Stein Steel and Supply Company, Atlanta; Donna Adams, a senior associate at DMWPV (Dunbar Milby Williams Pittman & Vaughan), Richmond, Va.; and Monir Matta Mekhaeil, structural design manager - building projects, at Lusail Real Estate Development Company, Doha, Qatar. They’ve won complimentary full registration to NASCC: The Steel Conference in Toronto, March 26-28, at the Metro Toronto Convention Centre.

 

You can see the Queen Richmond Centre building project for yourself at The Steel Conference. There is no charge to attend this tour. However, registration is required and capacity is limited, so be sure to register early!

 

The construction site tour and presentation will focus primarily on the design and construction of the delta frames, which feature the massive 35,000-lb cast steel nodes. Also discussed will be the “table-top” steel platform, which was designed to integrate with the reinforced concrete tower above. The delta frames are primary elements of the gravity and lateral force resisting systems for the building. Due to the extreme magnitude of loading, the delta frame members and cast nodes are concrete filled for composite action while intumescent coating provides fire resistance.

 

You can also watch the installation of the three, 70-ft-tall, AESS delta frames featuring the cast steel nodes in Cast Connex’s five-minute time-lapse video of the project.


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