13.12 Freestate An outlet junction box is cast into the balcony slab in Unit 509 on the fifth floor of the north elevation. The outlet is not flush with the top of the slab, and the traffic coating is not yet applied up to the outlet (Photo 18). Electrical plans, including E-2.14, show floor-mounted “weather proof” electrical outlets in the exposed balconies that have no adjoining opaque walls. Water that bypasses the traffic coating and penetrates through the exposed balcony slabs will likely drip to the exterior balcony below. However, the leakage may damage the electrical wiring. We recommend Grunley and the design team confirm the submitted “weather proof” floor-mounted outlets are appropriate for this application and the electrical wiring is not at risk for water damage. The traffic coating system should extend to the base of the junction box and seal to the sides with a fillet of Neogard’s 70995 polyurethane sealant. 13.13 Freestate An outlet junction box is cast into the balcony slab in Unit 207 on the second floor of the north elevation. The outlet is flush with the top of the slab, and the HRA waterproofing and pavers are not yet applied to the balcony slab (Photo 19). Electrical plans, including E-2.10, show floor-mounted “weather proof” electrical outlets in the protected roofing balconies that have no adjoining opaque walls. Water that bypasses the HRA waterproofing will likely leak to the occupied space below. Additionally, the paver assembly will cover over the outlet unless it is raised higher. We recommend Grunley and the design team confirm the submitted “weather proof” floor-mounted outlets are appropriate for this application and the electrical wiring is not at risk for water damage. We recommend connecting a solid conduit (not corrugated flexible conduit) through the junction box to the conduit cast into the slab, filling the junction box with grout, and applying the waterproofing over the grout and onto the solid conduit. The final conduit should include a flanged face plate to sit flush on top of the pavers. The HRA should be reinforced with uncured neoprene, extend 3 in. min. onto the conduit, and be secured with a band clamp similar to Detail 36 on Sheet 12 of the HRA shop drawings (Submittal 46-01).
8.4 (Foilskin at Rough Openings) Icon Adhere the Foilskin and Blueskin SA membranes continuously around the rough openings then only cut out and removing the membrane at the curtain wall head and sill anchors. JMC should review the size and location of the anchors with Icon. At least 1 in. of Foilskin should remain between the jamb and side of the anchor to protect the vulnerable corners. Icon should seal the perimeter of the anchors to the membrane system. Where the is already constructed above the Zen Garden, JMC should adhere football-shaped patches of Foilskin to the head-jamb corners and seal the patch edges with HE925 BES sealant. On 9 December 2014, we observed the Foilskin was adhered continuously to the north elevation of the first floor slab then cut out only around the anchors for curtain wall sills. We did not observe an area of Foilskin installed at a curtain wall head. On 8 January 2015, Grunley told us the construction team intends to adhere the Foilskin continuously over the anchors and only remove membrane at bolts. Icon is currently verifying this approach will not interfere with the connection’s structural capacity. This will not interfere. OPEN 9.1 (Trash Room) Calderon James Myers Adhere the HRA waterproofing in the Trash Room and Trash Compactor Room to the structural slab, cover it with drainage composite, and extend it up the base of the partition walls. Secure the vertical face of the HRA with a termination bar below the top of the topping slab and separate it from the topping slab edge with compressible filler. Place cement board at the base of the metal stud. On 11 February, we observed cement board fastened to the base of the metal studs in the Trash Room and Trash Compactor Room. HRA waterproofing is not yet applied to the structural slab. OPEN
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
11.7 (Roof Parapet Expansion Joint) James Myers Provide an expanding expansion joint (Emshield by Emseal) sealed to Blueskin HT membrane within the vertical expansion joints in the roof parapets, as shown in 5/A5.37. The expanding foam joint should seal into a prefabricated boot at the end of the horizontal roof expansion joint (RoofJoint by Emseal). The flanges of the RoofJoint should be stripped-in with HRA waterproofing on the curb and with Blueskin HT on the parapet. Submit expansion joint shop drawings. OPEN 11.8 (Stand-alone Mockup) Construct the insulated metal panel infill between the curtain wall units on the mockup. Seal the operable portion of the mockup to the surrounding construction. Test the mockup for air leakage and water penetration in the near future. On 6 February 2014, we observed the curtain wall is sealed to an insulated metal panel infill. ATI conducted air leakage and water penetration tests on the mockup. Refer to SGH Field Report 12. CLOSED Distribution Robert Lockhart – Capital Construction Consultants, Inc. (CCCI) Greg Auger – CCCI Christena McCabe – Eric Colbert & Associates (ECA) Robert Soper – Grunley Gregory McHugh – Grunley Petar Radakovic – Grunley Jake Yatsko – Grunley
View of the courtyard elevations from the eastern side of the alley. Blueskin SA is adhered to portions of the slab edges and window rough openings from the cellar level up to the ninth floor slab. View of the entry plaza elevations as viewed from Connecticut Ave. Unitized curtain wall frames are anchored to the façade on portions of the first, second, third, and fourth floors. A smooth-faced concrete knee wall (approximately 3 ft tall) is cast at the base of the Yoga Room north elevation. Wood formwork for the retaining wall is erected west of the building corner. HRA waterproofing (outlined) extends along the west side of the Yoga Room and wraps around the bottom of the knee wall (approximately 12 in. high) but does not extend up the full wall height.