Penthouse Addition - Manhattan, NY

Start Date: May 2008
Architect: D+Form Architecture
Lead Structural Engineer: Moore Associates
Employer: Pustola & Associates

This is a steel residential addition to the top of an existing building that has a combination brick and mortar lateral shell and a cast-iron gravity structure.

The major obstacle with the design of this structure was distributing the new lateral and gravity loads of the addition in a way as to not put the cast-iron structure in tension. Therefore, I designed a drag strut system that supports the column loads from the addition and converts all the lateral and gravity loads to manageable axial loads that put the cast-iron columns in pure compression.





This was a project I did under the employment of Pustola and Associates and by hire from Moore Associates.