CITY COUNCIL REGULAR MEETING AGENDA PACKET

3 | Page City of Pleasanton Amador Theater programmatic Rehab vs. Build cost comparison 2018-024-02 of the original construction has been found, which means that the original building will need to be treated as a new structure and made to comply with the current applicable Title 24, California Building Code. Existing Conditions: The current Theater is a single-story structure with a balcony located along the East wall of the building. Two additions were made to the building in 1988 – a new lobby structure to the East of the original Theater and a new Scene Shop located to the North of the original Theater and East of the Girl’s Gymnasium structure. The original Theater was built in 1932 with concrete perimeter walls and a wood framed roof supported by riveted steel trusses. The roof trusses sit atop concrete pilasters build integral with the North and South exterior walls. It is unknown if there are steel columns embedded within the concrete pilasters. There is a small dressing room located beneath the stage area of the theater. The balcony along the East wall is of wood framed construction. It clear spans the width of the theater with no columns visible between the perimeter walls. It is assumed that there is most likely some form of steel truss work within the balcony cavity, but the full extent of this framing is unknown at this time. The main floor of the theater appears to be a concrete slab on grade. Resistance to lateral loads is provided by the roof diagonal sheathing and the perimeter concrete shear walls. The foundations for the original, 1932 construction are unknown; however, based on drawings for the 1988 Additions, they appear to be conventional spread footings beneath columns and continuous, strip footings below bearing walls. No dimensions for these footings are available. In 1988 a new Lobby Addition was immediately to the East of the original building entrance. The structure is a single-story wood frame with a pair of stairs leading up to an entrance to the balcony through the original theater wall. There is a steel moment frame within the wall adjacent to the original building. The roof is wood framing supported by perimeter bearing walls and interior steel columns. Resistance to lateral loads is provided by a plywood diaphragm and plywood shear walls. Foundations for the lobby and concrete floor are provided by concrete beams and drilled concrete piers. Not geotechnical information used of the lobby addition is available. In addition to the Lobby, a new Scene Shop was built in the NW corner of the lot adjacent to the stage. The roof framing is wood framing supported by perimeter wood framed walls and interior steel columns. Resistance to lateral loads is provided by a plywood diaphragm and plywood shear walls. Foundation support is provided by drilled piers on the South and West sides of the building, offset, but parallel to the adjacent buildings. On the North and East walls, conventional, continuous footings are used. Along the North wall of the Scene Shop, a wood frame mezzanine exists. It has been reported that drawings for the mezzanine exist; however, these were not available at the time of this report. At the time of construction of the Scene Shop, two new openings were sawcut through the existing theater stage wall to allow access between the two spaces. One was a man-door and the other was an 8 foot by 16 foot roll up door. Structural Assessment: Generally, the Theater, Lobby, and Scene Shop all appear to be in good condition based on visual observations made on December 1, 2021; however, due to the lack of any “as-built” drawings, DSA has indicated that in order to return the building to the District Records as an approved facility the building will require a complete structural evaluation treating it as new construction and conforming to the current CBC requirement. This means that in order to prepare detailed calculations, numerous structural tests will be required in order to validate the existing construction for each building and permit the preparation of structural calculations to determine the full extent of any upgrades necessary. Page 59 of 454