Attic sprinkler pressure shortfall flagged; flow tests and solutions sought to avoid schedule delay

Contractors reported that modeling for the attic dry sprinkler system in the 1892 attic did not achieve an adequate pressure margin. A presenter said the design team identified four possible solution paths and that some solutions depend on flow tests and data from adjacent city projects. "When we modeled the system... we're not, to your point, achieving the... safety margin for the PSI," Kyle Osmek said, adding the design team is pursuing options and that the project team expects more information in the next two weeks.

Robin, representing the design side, explained that the subcontractor-level piping layout can change detailed math and that the issue has now moved from high-level design into those detailed trade layouts. Committee members were told that if equipment or system changes are required — or if heat must be added to satisfy the sprinkler approach — the team will quantify potential schedule impacts as solutions are developed.