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BLD2023-0399+ANCORAGE+11.21.2023_9.13.42_AM+3912423Memorandum Client: Client Address: Contractor: Project: Project Number: Johnston Architects 3131 Western Avenue, Suite 510 Seattle, WA 98121 Faber Construction Sno-Isle Edmonds Library Nanawall 00484-2023-04 Swenson Say Faget STRUCTURAL ENGINEERING 206.443.6212 �+ ssfengineers.com Date: From: SEATTLE 2124 Third Avenue, Suite 100 Seattle, WA 98121 TACOMA 934 Broadway, Suite 100 Tacoma, WA 98402 CENTRAL WASHINGTON 414 N Pearl Street, Suite 8 Ellensburg, WA 98926 November 16, 2023 Lori DeBoer, PE, SE We are writing this memorandum to provide our recommendations related to the installation of new anchorage at the underside of the existing precast concrete spandeck at the plaza/second floor structure for the highlighted locations shown in the sketch on the second page of this memorandum. This sketch with the highlighted locations was provided to us by the architect on 11/16/2023. From the existing 1981 structural drawings, it is our understanding that the existing spandeck structure is 12-inch thick. However, the existing drawings do not specify the reinforcement for the spandeck, and no other additional information or drawings related to the detailing of the existing spandeck was made available to us. Based upon in -field scanning completed by the contractor at a few select locations, it was determined that the existing spandeck is likely reinforced with bonded tendons at web locations. For any anchorage installation into the underside of the existing spandeck, no reinforcement (including the tendons) should be interrupted or damaged. Since we do not have existing drawings that specify the clear cover to the existing reinforcement, we have assumed 3/4" minimum clearance based upon current code provisions. Based on this assumption, we recommend all anchorage into the underside of the existing spandeck is less than 3/4" in depth. This is an assumption only and is not a guarantee of the as -built clear cover at any location. It is the contractor's responsibility to verify the as - built clear cover to the existing reinforcement to avoid any interruption or damage to existing reinforcement. Larger embedments exceeding 3/4" may be able to be achieved at some areas by locating existing panel edges, webs, and reinforcement (including tendons). We recommend that the contractor locates the existing spandeck web and tendons and avoid any attachment at these locations. It is the contractor's responsibility to locate existing reinforcement prior to installation of anchorage to avoid any interruption or damage to existing reinforcement. Sincerely, Lori DeBoer, PE, SE Associate Principal Ideboer@ssfengineers.com 2 n N M N O N N 00 m c u 0 a w 0 w 3'-0" T-0" 3'-0" F-AT9,11 IIUr/fj 011 O O O I I I A/// 'R1/4/4 i0 i 0 i P i am %R1/ i ® 0 0 CIA CIA CIA CIA CIA r' i� i� i i� �� i� i i� i� i i� 15 EQ EQ C5 1� /�? �/� /X//� 7/2 i C1�-- 1— C1� C5 5 i �i 5 3'-6" EQ EQ T-0" 0 T-0" T-6" ,R1 �i �� % i R1 R1 APPROXIIMATE 3 A910 C1 C1 r) LOCATION OF LU 6 A910 9' - 4" i i i i 14 - ---f1� 00 DUCTWORK PER �/ R2 5 ��% S1 07/05/23 SITE WALK a 12'-0" 12'-T , �� �R / , I w0' 14 o 3 Cl- C1 L1 L1 L1 �i R1 i i �i �i % i 12 �C1 1 C1 NOT IN SCOPE \ A910 q 9' - 4" i i� 1 8 4 i� i� w + i i 5 A910 A910 / 9 - 4 i 8' - 0" 18 �C1- - - C1 9 - 5 R10 / 2'-10'/ EQ EQ' c� C1 o C1 C1 E E -- - 8 _ 12 4 __ 5 w w L1 8 8 w � 14 _ i C4 / V1 8' - 0' w T1 + T1 T1 14 � CE . ALIGN w A910 +/- 9'-0" 9'-6" T ITT III 10 APPROXIMATE LOCATION OF VAV 12 2 3 _ C1 C1 ® C1 A910 AND ACCESS PANEL, VERIFY IN FIELD ® 11 1 OCE �CE------------------- ------�-- ----- ----- - -�---- ------cam--- ----o- II L4A L4A L4A 6' 91/2'- - �- - 10' 0" 1 10' 0" 1 10' 0" 1 10'-01, 1 10' 0" 9 O° A910 9 24'-0" `"' 16'-0" 16'-0" A910 - _ — C1� O CE '® CE CEO i CE® i L2 w L2 L2 L4B I CE 20'-0" L4A L4A 4 L4A 18co 0 - �' 12 10 n15 Cy 2'-0" ; C ; ,,, C ; L2 00 °C1 _ 9" C1� A910 I o C1 _ 28'-0" 16'-0" 16'-0° ALIGN o L4B r; v ALIGN TYP. - o ci N 0 E L2 L2 L2 10 23 ^01'-7" 5'-10" 2'4' 20'-0" I1'-4" C1I I� - 1'-2" zs C10 L2 ALIGN TYP. 1 ALIGN TYP. ALIGN TYP. ALIGN 1 ALIGN 0 oC1 O q 4 A901 c� 6'-7" °° A950 O w ® CE - O 28'-0" 16'-0" `24'-0" O 24'-0" I - o c1 0 0 c1 _ O _ L2 L2 L2 L2 CIE � o`C1 - O O 0 W G L2 ®: CE CE "0 CE-D 24'-0" EQ 24'-0" EQ EQ 24'-0" EQ C1B C1B- C1B- C1B - - - - - - - ^C4 ' 4 C4. C4 - - - L2 L2 L2 w -�_ A910 10' - 6" o - w _ M C1 _ C1B C1B C1B C1BI _ _ _ _ _ DIFFUSERS PER MECH. DWGS FOR REFERENCE 3' - 6" EQ EQ 3' - 6" ej�EQ 24' 0" EQ 24'-0" 14 24'-0" ONLY (TYP) C, 5 CE o CL 0 `o O L2 - - - - L2 - - - - L2 C1B/ C1B C113 C1B M C1 ® O O mr o C11 ALIGN TYP. O ,_ „ „ C ®CE 24 0 5 24 -0 24 0 3 V 1 'j A950 2 L2 - - - L2 - - - L2 CE.111 CEI. ' ; 2 0 6'-0" 10'-6" 10' 6" - - - - - - 2 TYP. P1A Pi A P1A P1A P1A P1A - PIA (.0 0 LEVEL 1 - REFLECTED CEILING PLAN 1 SCALE: 1/8" = 1'-0" ct: CE 0 24'-0" 0 O CE; - Q'CE , O CE O CE O CE 3 RCP GENERAL NOTES A. REFLECTED CEILING PLANS SHOW GENERAL TYPE, LOCATION, AND ORIENTATION OF LIGHTS, REGISTERS, AND DIFFUSERS AND OTHER CEILING MOUNTED ITEMS. REFER TO MECHANICAL, PLUMBING AND ELECTRICAL DRAWINGS FOR ACCESS DOOR LOCATIONS AND OTHER MORE SPECIFIC REQUIREMENTS. B. CEILING AND SOFFIT HEIGHTS ARE MEASURED VERTICALLY FROM THE FINISHED FACE OF CEILING OR SOFFIT TO FLOOR. C. ADJUST METAL FRAMING SIZE, GAUGE, AND SPACING AT SOFFITS AND CEILINGS TO MEET MANUFACTURER'S PUBLISHED SPAN TABLES AND AS REQUIRED TO SUPPORT GRAVITY AND LATERAL LOADS. D. REFER TO SHEET E2.00 FOR LUMINAIRE SCHEDULE. E. SEE SHEET A910 FOR TYPICAL ACT DETAILS A5F. SUSPENDED LIGHT FIXT ES IN OPEN LIBRARY SPACE TO BE 14 MOUNTED AT 9'-8" AFF. 14 G. MECHANICAL DIFFUSE BE MOUNTED AT 9'-8" AFF EXCEPT WHERE ANOTED OTHERWISE. 13 H. ACOUSTIC CEILING CLOUDS TO BE MOUNTED AT 10'-6" AFF. KEY NOTES Q-- 1. PAINT UNDERSIDE OF SLAB, CONDUIT AND DUCTWORK ABOVE AT ALL EXPOSED CEILING LOCATIONS, INCLUDING WHERE ACOUSTIC CLOUDS WILL BE INSTALLED. 2. SUSPENDED ACOUSTIC CEILING CLOUD: REFER TO A911. 3. AT EXISTING SOFFIT, CONTINUE GWB TO BOTTOM OF STRUCTURE WHERE IT DOES NOT CURRENTLY EXIST. 4. ADD INSULATION ABOVE ACT PER DETAIL. A5. INSTALL NEW DIFFUSER. 6. ALIGN REQUIRED WOOD CEILING EXPANSION JOINT WITH FACE OF 14 ADJACENT SOFFIT. 7. DIFFUSER HEIGHT TO BE 8' IN STAFF LOUNGE. 8. 6' LINEAR DIFFUSER. LOCATE TO NEAREST WHOLE SLAT INCREMENT IN WOOD CEILING. RETURN GRILLE ALIGN BOTTOM F.F. OF NEW SOFFIT WITH THE BOTTOM F.F. OF XISTING SOFFIT. 11. NSTALL NEW RETURN GRILL. 23 12. NSTALL NEW RETURN GRILL WITH ACOUSTIC DAMPER. RCP MATERIALS LEGEND EXISTING GWB CEILING NEW GWB CEILING NEW ACT IN NEW GRID NEW ACT IN EXISTING GRID WOOD CEILING WOOD FINISH TRIM Johnston Architects, LLC 3131 Western Ave, Suite 510 Seattle, WA 98121 t 206.523.6150 f 206.523.9382 Cn 0 Z 0 W o W >- C) w� J LLI Q Q ~ U) U� O Z_ 0 Q Z Z _ 0 (D �w DRAWING ISSUE # DATE DESCRIPTION 03/31/2023 ISSUE FOR PERMIT 5 06/22/2023 ASI #002 2 06/01/2023 RFI #008 10 06/20/23 RFI #018 13 07/03/2023 ASI #003 14 07/11/2023 ASI #004 15 07/25/2023 ASI #005 18 8/2/2023 RFI #57 22 08/21/2023 ASK#012 23 08/25/2023 1 ASI #008 SHEET TITLE REFLECTED CEILING PLAN SHEET NO. A600 Drawn MAC, LB Checked AWB 0' 8' 16' © 2023 JOHNSTON ARCHITECTS