LNB provided complete design and construction document services for a hospital addition/renovation project that created an alternative route for critical patients arriving via the existing rooftop helicopter pad. The project created a desired secondary point of entry option via a new rooftop interior corridor “link” leading directly into the existing bed tower of the hospital.

The new link needed to be strategically located to avoid a variety of randomly placed stair towers and rooftop HVAC units and to align its structural bearing with the existing structure below. Additional challenges included accommodating ADA compliant interior level changes and designing the exterior to complement the existing exposed aggregate concrete panel cladding of building. The interior of the link allows stretcher clearances at corridor turns and energy efficient air-lock entrances at both ends via new automatic sliding doors. The link has its own new mechanical system. On the exterior, the new link provides multiple direct access for emergency egress, roof area maintenance, fall safety apparatus and required rooftop unit clearances. The existing EPDM roof drainage patterns were redesigned to allow for the new link structure. The exterior cladding material is an aggregate face type of EIFS with parapet walls that closely matched the

existing cladding and joint pattern of the building’s concrete panels, but it was much lighter in weight to benefit bearing on the existing structure. The exterior walls, windows and roof are of energy efficient design. The new horizontally proportioned window frames and tinted glass match the existing replacement windows of the bed tower. From grade level the new link appears as it was intended, like it is a part of the original building.