The design team’s decision to use mass timber was driven by a number of factors — chief among them was timber’s light weight. According to Corrado, the existing building could not handle the load of a traditional concrete overbuild. “We would have had to beef up the existing structure below, which would have been extremely expensive and disruptive to the tenants,” explained Corrado.
Timber’s light weight also proved advantageous by allowing the team to deliver the project faster as well, with less impact to the occupied building. The team built an innovative interstitial layer using steel, thereby providing Hickok Cole the opportunity to work from a clean slate, which is not traditionally seen with mass timber, and to incorporate Type IVC construction on top of Type IA.
“The use of Type IVC construction with some components of Type IVB construction was a unique hybrid approach,” said Jason Wright, associate principal and senior project manager, Hickok Cole. “ If we had to cover up a percentage of the timber as required by IVB, we would have lost that market value.”
“People are going to be impressed with the attention to detail,” said Patrick Cotter, director, Davis Construction. “The level to which all of the other trades have been integrated with the timber and how everything comes together is going to be impressive.”