9.2 Remove the concrete around On 8 January 2015, we the drains in the Trash observed the concrete is (Trash Room) Compactor Room and extend chipped out around the drain, the HRA waterproofing into the but the drain does not include a Mid Atlantic drain bowl. If the drain bi-level cover that can includes bi-level drainage, the accommodate the 4 in. topping drain floor strainer should be slab. The plumbing plans call raised with an elevated collar for the floor drains (FD) to be to align with the top of the Z415 with Type B strainers by topping slab. If the drain does Zurn. The Type B strainer is not include the appropriate in. tall at most, given the strainer, we recommend 3 in. pipe diameter. We OPEN replacing the strainer and/or recommend the project team drain system. explore options for altering the strainer type without removing the drain body. We note that the Z415 Type H strainer is in. tall and has a similar screw-in attachment system. If the strainer cannot accommodate the topping slab, Grunley should propose an alternate system in an RFI. 10.1 Adhere the traffic coating onto On 8 January 2015, we the balcony slabs and 4 in. up discussed the balcony traffic (Top of Balcony the base of the opaque walls coating installation sequence Slabs) prior to adhering the Blueskin with Grunley and Epoxy SA onto the backup wall and Systems while on site. Baltimore over the traffic coating. Terminate the Blueskin SA on Waterproofing the vertical wall. Wrap the traffic coating around the side edge of the balcony slab. OPEN Where the Blueskin SA already extends onto the horizontal surface of the balcony slab on the lower floors of the courtyard elevations, we recommend removing the Blueskin SA, cleaning the surface, applying the traffic coating, and reapplying the Blueskin SA.
9.2 (Trash Room) Mid Atlantic Remove the concrete around the drains in the Trash Compactor Room and extend the HRA waterproofing into the drain bowl. If the drain includes bi-level drainage, the drain floor strainer should be raised with an elevated collar to align with the top of the topping slab. If the drain does not include the appropriate strainer, we recommend replacing the strainer and/or drain system. On 8 January 2015, we observed the concrete is chipped out around the drain, but the drain does not include a bi-level cover that can accommodate the 4 in. topping slab. The plumbing plans call for the floor drains (FD) to be Z415 with Type B strainers by Zurn. The Type B strainer is in. tall at most, given the 3 in. pipe diameter. We recommend the project team explore options for altering the strainer type without removing the drain body. We note that the Z415 Type H strainer is in. tall and has a similar screw-in attachment system. If the strainer cannot accommodate the topping slab, Grunley should propose an alternate system in an RFI. OPEN 10.1 (Top of Balcony Slabs) Baltimore Waterproofing Adhere the traffic coating onto the balcony slabs and 4 in. up the base of the opaque walls prior to adhering the Blueskin SA onto the backup wall and over the traffic coating. Terminate the Blueskin SA on the vertical wall. Wrap the traffic coating around the side edge of the balcony slab. Where the Blueskin SA already extends onto the horizontal surface of the balcony slab on the lower floors of the courtyard elevations, we recommend removing the Blueskin SA, cleaning the surface, applying the traffic coating, and reapplying the Blueskin SA. On 8 January 2015, we discussed the balcony traffic coating installation sequence with Grunley and Epoxy Systems while on site. OPEN
Field%20Report%2013%20SGH.docx