PERCH designed two hoists for access to a 50-story residential tower under construction in Boston. Challenges included foundation design for such a tall hoist, developing a clamping tie to a four-story concrete column that could withstand wind forces on the hoist, and designing a post-construction detail for anchoring to a prestressed concrete floor slab where the general contractor inadvertently omitted two inserts prior to placing the concrete. PERCH drafted plans for hoist construction, conducted site visits, and corresponded with hoist subcontractor Julian Crane as well as the general contractor.