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HomeMy WebLinkAboutBT105-CRE-00180 RFI 00025 HS Design Load Revision for FIL-1 and FIL-2 To: Attn: Contech Shop Drawing Seq. No. 30 and 35 YES TBD Please see the below Request for Information from Contech Engineered Soluctions LLC regarding required HS design load revisions for FIL-1 and FIL-2. Reviewed and Approved By: /s/ Jaylen Hong DATE:4/9/2026 CENTRAL PUGET SOUND REGIONAL TRANSIT AUTHORITY - SOUND TRANSIT Sent by: Jaylen Hong Correspondence #Spec Section RFI Description HS Design Load Revision for FIL-1 and FIL-2 REFERENCE DOCUMENTS WSDOT Div 7 Contract RFI # Request for Information RFI Name: Shimmick Construction Company, Inc. Seattle, WA 98104 Irvine, CA 92618 BT105 RENTON TRANSIT CENTER SOUND TRANSIT From:SHIMMICK CONSTRUCTION COMPANY, INC. CONTRACT #:CN0205-24 401 S Jackson St 530 Technology Drive, Suite 300 BT105-CRE-00180 RFI 00025 HS Design Load Revision for FIL-1 and FIL-2 Submittal was reviewed for conformance to contractual requirements. Drawing No. Reference: Schedule Impact: Contractor's Review Stamp THIRD PARTY IMPACTS NO Third Party RFI No.: Differing Site Condition: RFI REQUEST 001Company: Contech WSDOT Div 7 909-256-9478 415-728-8786 c-greg.frost@soundtransit.org jaylen.hong@shimmick.com Cost Impact: Greg Frost, Resident Engineer Specification Paragraph: Specification Section: CN0205-24 00025 BT105-CRE-00180 ©2020 Contech Engineered Solutions LLC Page 1 of 1 Request for Information Prepared by Jordan Drugge on April 6, 2026 Stride Bus Rapid Transit (BRT) – South Renton Transit Center – BT105 Renton, Washington Project Description Fabrication drawings were requested from Contech for project number 764760, sequences 30 & 35. The corresponding structure ID for each sequence is given below: Seq. 30 – FIL - 1 Seq. 35 – FIL - 2 Information Requested Upon structural review, to maintain the approved elevations for both sequences, the design load will need to be reduced to the following: Pedestrian (300 PSF) live load with HS-20 surcharge and H-5 load at the curb inlet, assuming earth cover of 0’ and groundwater elevation at or below finished grade elevation. Per plans dated 06/09/2025 both units appear to be placed in a sidewalk or landscape area with a curb opening. Please confirm that the design load can be reduced to pedestrian for seq. 30 & 35. FRONT FACE OF CURB 4" MIN. 8" TOP SLAB THICKNESS VAULT WALL STREET CAST-IN-PLACE CONCRETE BY CONTRACTOR, PER LOCAL STANDARDS THREADED #4 REBAR DOWELS. CONTRACTOR TO INSTALL AND BEND AS REQUIRED PRIOR TO INSTALLATION OF CAST-IN-PLACE GUTTER THROAT PROTECTION DEVICE. DO NOT REMOVE - LEAVE IN PLACE UNTIL SITE IS STABILIZED AND FILTERRA IS ACTIVATED CURB INLET DETAIL NOT TO SCALE TERRAFLUME 90° NOSE PLATE CAST-IN TO TOP SLAB COUNT DESCRIPTION INSTALLED BY 6 CF MULCH. SEE INSTALLATION NOTE G CONTECH 1 ENERGY DISSIPATION ROCK LAYER CONTECH 30 CF STANDARD FILTERRA MEDIA (1.50 T)CONTECH 12 CF 1/2" #4 ROUND AGGREGATE UNDERDRAIN STONE (0.57 T)CONTECH 1 FTIBC0406-4-8-L-4.04 FK CONTECH 1 TERRAFLUME TRAY FTIBC-48" x 18" with 8" PIPE, FIBERGLASS CONTECH 1 30"Ø x 4'' FRAME AND COVER, EJ #41600483 (CAST-IN)CONTECH 1 7''Ø x 8'' CLEANOUT (CAST-IN)CONTECH 1 SEALANT FOR JOINTS CONTECH 4 LF 2-1/2'' x 2-1/2'' x 1/4'' CURB NOSING (CAST-IN)CONTECH 1'-3" FILTERRA MEDIA RIGHT END ELEVATION VIEW 3" MULCH ELEVATION VIEW ENERGY DISSIPATION ROCK LAYER PLAN VIEW (TOP SLAB NOT SHOWN) PLAN VIEW FRONT FACE OF CURB ENERGY DISSIPATION ROCK LAYER 4"Ø PVC UNDERDRAIN RIM / TOP OF CURB ELEV. = 23.96± OUTSIDE BOTTOM ELEV. 19.82 OUTLET PIPE INV. ELEV. = 20.40 TERRAFLUME TRAY 6" UNDERDRAIN STONE TERRAFLUME TRAY OUTLET MEDIA BAY SEE CURB INLET DETAIL THIS SHEET 8"Ø SDR 35 PVC OUTLET COUPLING CAST INTO WALL CLEANOUT (CAST-IN) 8"Ø PVC BYPASS PIPE FLOW 7'-0" 3'-6"1'-1" 2'- 0 " 4'-0" CURB NOSING 5'- 0 " 6'-0"6" TYP. 4'-0" CURB INLET OPENING 1'-0" 4'- 0 " 1'- 1 0 34" 4' - 1 34" 1" 3'- 6 34" 7" 1' - 6 " 8"Ø SDR 35 PVC OUTLET COUPLING 1'-6" 30'Ø' x 4'' FRAME AND COVER (FRAME CAST-IN) TERRAFLUME TRAY W/ 8"Ø BYPASS SITE DESIGN DATAMATERIALS LIST WATER QUALITY FLOW RATE 0.071 CFS PEAK FLOW RATE 0.30 CFS RETURN PERIOD OF PEAK FLOW 100 YRS BIOFILTRATION MEDIA INFILTRATION RATE 324 IN/HR CUZ LAYOUT 6 FTIBC0406 UG-L GENERAL NOTES 1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE 2. FOR FABRICATION DRAWINGS WITH DETAILED VAULT DIMENSIONS AND WEIGHTS, PLEASE CONTACT YOUR CONTECH REPRESENTATIVE. www.ContechES.com 3. FILTERRA WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THIS DRAWING 4. STRUCTURE SHALL MEET HS-25 LOAD RATING, ASSUMING EARTH COVER OF 0' AND GROUNDWATER ELEVATION AT, OR BELOW, THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGS SHALL MEET AASHTO M306 AND BE CAST WIHT THE CONTECH LOGO. 5. FILTERRA STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING WITH ASTM C857, ASTM C918 AND AASHTO LOAD FACTOR DESIGN METHOD 6. TOP SLABS WITH EXPOSED SURFACES TO HAVE A BROOM FINISH WITH TOOLING AROUND THE PERIMETER (~2” SMOOTH TROWELED EDGE) 7. MULCH AND DISSIPATION ROCKS SUPPLIED BY CONTECH AND DELIVERED AT TIME OF SYSTEM ACTIVATION INSTALLATION NOTES A. ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGN CONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD B. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THE FILTERRA VAULT. SPREADER BAR WITH SUFFICIENT CABLE IS REQUIRED FOR SAFETY AND REDUCTION OF DAMAGE TO CONCRETE STRUCTURE C. CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL VAULT SECTIONS AND ASSEMBLE VAULT D. CONTRACTOR TO PROVIDE, INSTALL AND GROUT OUTLET PIPE. PVC COUPLING CAST-IN TO WALL FOR OUTLET PIPE CONNECTION E. CONTRACTOR TO SUPPLY AND INSTALL INLET PROTECTION BAR IF REQUIRED BY LOCAL JURISDICTION F. CONTRACTOR TO TAKE APPROPRIATE MEASURES TO PROTECT FILTERRA MEDIA BAY FROM CONSTRUCTION-RELATED EROSION RUNOFF G. CONTACT CONTECH MAINTENANCE AND FIELD OPERATIONS AT 513-645-7770 TO SCHEDULE ACTIVATION 10/20/25 DATE: APPROVED: JMD CHECKED: SHEET: \\Q U I K R E T E . N E T \ C O N T E C H \ M E R L I N \ P R O J E C T \ A C T I V E \ 7 6 4 7 0 0 \ 7 6 4 7 6 0 \ 7 6 4 7 6 0 - 3 0 - M O D U L A R W E T L A N D S \ D R A W I N G S \ 7 6 4 7 6 0 - 0 3 0 - F T I B C 0 4 0 6 - U G - C O N F A B . D W G 1 0 / 2 0 / 2 0 2 5 1 0 : 1 4 A M OF SPC DRAWN:DESIGNED: Th e d e s i g n a n d i n f o r m a t i o n s h o w n o n t h i s d r a w i n g i s pr o v i d e d a s a s e r v i c e t o t h e p r o j e c t o w n e r , e n g i n e e r a n d co n t r a c t o r b y C O N T E C H C o n s t r u c t i o n P r o d u c t s I n c . o r on e o f i t s a f f i l i a t e d c o m p a n i e s ( " C O N T E C H " ) . N e i t h e r th i s d r a w i n g , n o r a n y p a r t t h e r e o f , m a y b e u s e d , re p r o d u c e d o r m o d i f i e d i n a n y m a n n e r w i t h o u t t h e p r i o r wr i t t e n c o n s e n t o f C O N T E C H . F a i l u r e t o c o m p l y i s do n e a t t h e u s e r ' s o w n r i s k a n d C O N T E C H e x p r e s s l y dis c l a i m s a n y l i a b i l i t y o r r e s p o n s i b i l i t y f o r s u c h u s e . If d i s c r e p a n c i e s b e t w e e n t h e s u p p l i e d i n f o r m a t i o n u p o n wh i c h t h e d r a w i n g i s b a s e d a n d a c t u a l f i e l d c o n d i t i o n s ar e e n c o u n t e r e d a s s i t e w o r k p r o g r e s s e s , t h e s e dis c r e p a n c i e s m u s t b e r e p o r t e d t o C O N T E C H im m e d i a t e l y f o r r e - e v a l u a t i o n o f t h e d e s i g n . C O N T E C H ac c e p t s n o l i a b i l i t y f o r d e s i g n s b a s e d o n m i s s i n g , in c o m p l e t e o r i n a c c u r a t e i n f o r m a t i o n s u p p l i e d b y o t h e r s . JMD 764760 JMD SEQUENCE No.: 030 PROJECT No.: 1 1 RE V I S I O N D E S C R I P T I O N DA T E MA R K BY ww w . C o n t e c h E S . c o m TH I S P R O D U C T M A Y B E P R O T E C T E D B Y O N E O R M O R E O F TH E F O L L O W I N G U . S . P A T E N T S : 6 , 2 7 7 , 2 7 4 ; 6 , 5 6 9 , 3 2 1 ; 7,6 2 5 , 4 8 5 ; 7 , 4 2 5 , 2 6 1 ; 7 , 8 3 3 , 4 1 2 ; R E L A T E D F O R E I G N P A T E N T S . ® FI L T E R R A I N T E R N A L B Y P A S S C U R B FT I B C 4 x 6 U G -L 76 4 7 6 0 - 0 3 0 ST R I D E B U S R A P I D T R A N S I T ( B R T ) - S O U T H RE N T O N T R A N S I T C E N T E R - B T 1 0 5 RE N T O N , W A FO R S Y S T E M : F I L - 1 CONTRACT CONTECH DRAWING STRUCTURE WEIGHT APPROXIMATE HEAVIEST PICK = 12500 LBS. BASE SECTION SHIPPED WITH STONE AND FILTERRA MEDIA INSTALLED STRUCTURE DELIVERED IN 2 PIECE(S) MAX. FOOTPRINT = 5' x 7' 80 0 - 3 2 8 - 2 0 4 7 3 2 0 - 8 5 2 - 7 5 0 0 3 2 0 - 8 5 2 - 7 0 6 7 F A X 83 0 1 S t a t e H i g h w a y 2 9 N o r t h , A l e x a n d r i a , M N 5 6 3 0 8 STRUCTURAL CALCULATIONS TO BE DONE AFTER EOR APPROVES DESIGN, INCREASED MEMBER THICKNESSES AND ADDITIONAL STRUCTURAL SUPPORTS MAY BE NECESSARY. DRAWING SUBJECT TO CHANGE ACCORDINGLY. Shop Drawing approved in BT105-REC-00152 FRONT FACE OF CURB 4" MIN. 8" TOP SLAB THICKNESS VAULT WALL STREET CAST-IN-PLACE CONCRETE BY CONTRACTOR, PER LOCAL STANDARDS THREADED #4 REBAR DOWELS. CONTRACTOR TO INSTALL AND BEND AS REQUIRED PRIOR TO INSTALLATION OF CAST-IN-PLACE GUTTER THROAT PROTECTION DEVICE. DO NOT REMOVE - LEAVE IN PLACE UNTIL SITE IS STABILIZED AND FILTERRA IS ACTIVATED CURB INLET DETAIL NOT TO SCALE TERRAFLUME 90° NOSE PLATE CAST-IN TO TOP SLAB COUNT DESCRIPTION INSTALLED BY 4 CF MULCH. SEE INSTALLATION NOTE G CONTECH 1 ENERGY DISSIPATION ROCK LAYER CONTECH 28 CF STANDARD FILTERRA MEDIA (1.40 T)CONTECH 8 CF 1/2" #4 ROUND AGGREGATE UNDERDRAIN STONE (0.38 T)CONTECH 1 FTIBC0404-4-6-L FK CONTECH 1 TERRAFLUME TRAY FTIBC-48" x 18" with 6" PIPE, FIBERGLASS CONTECH 1 30"Ø x 4'' FRAME AND COVER, EJ #41600483 (CAST-IN)CONTECH 1 SEALANT FOR JOINTS CONTECH 4 LF 2-1/2'' x 2-1/2'' x 1/4'' CURB NOSING (CAST-IN)CONTECH 1'-9" FILTERRA MEDIA RIGHT END ELEVATION VIEW 3" MULCH ELEVATION VIEW ENERGY DISSIPATION ROCK LAYER PLAN VIEW (TOP SLAB NOT SHOWN) PLAN VIEW FRONT FACE OF CURB ENERGY DISSIPATION ROCK LAYER 4"Ø PVC UNDERDRAIN RIM / TOP OF CURB ELEV. = 27.01± OUTSIDE BOTTOM ELEV. 22.43 OUTLET PIPE INV. ELEV. = 23.01 TERRAFLUME TRAY 6" UNDERDRAIN STONE TERRAFLUME TRAY OUTLET MEDIA BAY SEE CURB INLET DETAIL THIS SHEET 6"Ø SDR 35 PVC OUTLET COUPLING CAST INTO WALL 6"Ø PVC BYPASS PIPE FLOW 5'-0" 2'-3" 2' - 6 " 4'-0" CURB NOSING 5'- 0 " 4'-0"6" TYP. 4'-0" CURB INLET OPENING 6" 4'- 0 " 1' - 1 0 " 4'- 7 " 1" 4' - 0 " 7" 2'- 0 " 6"Ø SDR 35 PVC OUTLET COUPLING 6" 30'Ø' x 4'' FRAME AND COVER (FRAME CAST-IN) TERRAFLUME TRAY W/ 6"Ø BYPASS 6"Ø SDR 35 PVC OUTLET COUPLING SITE DESIGN DATAMATERIALS LIST WATER QUALITY FLOW RATE 0.110 CFS PEAK FLOW RATE 0.428 CFS RETURN PERIOD OF PEAK FLOW 100 YRS BIOFILTRATION MEDIA INFILTRATION RATE 324 IN/HR CUZ LAYOUT 6 FTIBC0404 UG-L GENERAL NOTES 1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE 2. FOR FABRICATION DRAWINGS WITH DETAILED VAULT DIMENSIONS AND WEIGHTS, PLEASE CONTACT YOUR CONTECH REPRESENTATIVE. www.ContechES.com 3. FILTERRA WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THIS DRAWING 4. STRUCTURE SHALL MEET HS-20 LOAD RATING, ASSUMING EARTH COVER OF 0' AND GROUNDWATER ELEVATION AT, OR BELOW, THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGS SHALL MEET AASHTO M306 AND BE CAST WIHT THE CONTECH LOGO. 5. FILTERRA STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING WITH ASTM C857, ASTM C918 AND AASHTO LOAD FACTOR DESIGN METHOD 6. TOP SLABS WITH EXPOSED SURFACES TO HAVE A BROOM FINISH WITH TOOLING AROUND THE PERIMETER (~2” SMOOTH TROWELED EDGE) 7. MULCH AND DISSIPATION ROCKS SUPPLIED BY CONTECH AND DELIVERED AT TIME OF SYSTEM ACTIVATION INSTALLATION NOTES A. ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGN CONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD B. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THE FILTERRA VAULT. SPREADER BAR WITH SUFFICIENT CABLE IS REQUIRED FOR SAFETY AND REDUCTION OF DAMAGE TO CONCRETE STRUCTURE C. CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL VAULT SECTIONS AND ASSEMBLE VAULT D. CONTRACTOR TO PROVIDE, INSTALL AND GROUT OUTLET PIPE. PVC COUPLING CAST-IN TO WALL FOR OUTLET PIPE CONNECTION E. CONTRACTOR TO SUPPLY AND INSTALL INLET PROTECTION BAR IF REQUIRED BY LOCAL JURISDICTION F. CONTRACTOR TO TAKE APPROPRIATE MEASURES TO PROTECT FILTERRA MEDIA BAY FROM CONSTRUCTION-RELATED EROSION RUNOFF G. CONTACT CONTECH MAINTENANCE AND FIELD OPERATIONS AT 513-645-7770 TO SCHEDULE ACTIVATION 10/21/25 DATE: APPROVED: JMD CHECKED: SHEET: \\Q U I K R E T E . N E T \ C O N T E C H \ M E R L I N \ P R O J E C T \ A C T I V E \ 7 6 4 7 0 0 \ 7 6 4 7 6 0 \ 7 6 4 7 6 0 - 3 5 - F I L T E R R A \ D R A W I N G S \ 7 6 4 7 6 0 - 0 3 5 - F T I B C 0 4 0 4 - U G - C O N F A B . D W G 1 0 / 2 1 / 2 0 2 5 8 : 4 1 A M OF SPC DRAWN:DESIGNED: Th e d e s i g n a n d i n f o r m a t i o n s h o w n o n t h i s d r a w i n g i s pr o v i d e d a s a s e r v i c e t o t h e p r o j e c t o w n e r , e n g i n e e r a n d co n t r a c t o r b y C O N T E C H C o n s t r u c t i o n P r o d u c t s I n c . o r on e o f i t s a f f i l i a t e d c o m p a n i e s ( " C O N T E C H " ) . N e i t h e r th i s d r a w i n g , n o r a n y p a r t t h e r e o f , m a y b e u s e d , re p r o d u c e d o r m o d i f i e d i n a n y m a n n e r w i t h o u t t h e p r i o r wr i t t e n c o n s e n t o f C O N T E C H . F a i l u r e t o c o m p l y i s do n e a t t h e u s e r ' s o w n r i s k a n d C O N T E C H e x p r e s s l y dis c l a i m s a n y l i a b i l i t y o r r e s p o n s i b i l i t y f o r s u c h u s e . If d i s c r e p a n c i e s b e t w e e n t h e s u p p l i e d i n f o r m a t i o n u p o n wh i c h t h e d r a w i n g i s b a s e d a n d a c t u a l f i e l d c o n d i t i o n s ar e e n c o u n t e r e d a s s i t e w o r k p r o g r e s s e s , t h e s e dis c r e p a n c i e s m u s t b e r e p o r t e d t o C O N T E C H im m e d i a t e l y f o r r e - e v a l u a t i o n o f t h e d e s i g n . C O N T E C H ac c e p t s n o l i a b i l i t y f o r d e s i g n s b a s e d o n m i s s i n g , in c o m p l e t e o r i n a c c u r a t e i n f o r m a t i o n s u p p l i e d b y o t h e r s . JMD 764760 JMD SEQUENCE No.: 035 PROJECT No.: 1 1 RE V I S I O N D E S C R I P T I O N DA T E MA R K BY ww w . C o n t e c h E S . c o m TH I S P R O D U C T M A Y B E P R O T E C T E D B Y O N E O R M O R E O F TH E F O L L O W I N G U . S . P A T E N T S : 6 , 2 7 7 , 2 7 4 ; 6 , 5 6 9 , 3 2 1 ; 7,6 2 5 , 4 8 5 ; 7 , 4 2 5 , 2 6 1 ; 7 , 8 3 3 , 4 1 2 ; R E L A T E D F O R E I G N P A T E N T S . ® FI L T E R R A I N T E R N A L B Y P A S S C U R B FT I B C 4 x 4 U G -L 76 4 7 6 0 - 0 3 5 ST R I D E B U S R A P I D T R A N S I T ( B R T ) - S O U T H RE N T O N T R A N S I T C E N T E R - B T 1 0 5 RE N T O N , W A FO R S Y S T E M : F I L - 2 CONTRACT CONTECH DRAWING STRUCTURE WEIGHT APPROXIMATE HEAVIEST PICK = 11000 LBS. BASE SECTION SHIPPED WITH STONE AND FILTERRA MEDIA INSTALLED STRUCTURE DELIVERED IN 2 PIECE(S) MAX. FOOTPRINT = 5' x 5' 80 0 - 3 2 8 - 2 0 4 7 3 2 0 - 8 5 2 - 7 5 0 0 3 2 0 - 8 5 2 - 7 0 6 7 F A X 83 0 1 S t a t e H i g h w a y 2 9 N o r t h , A l e x a n d r i a , M N 5 6 3 0 8 STRUCTURAL CALCULATIONS TO BE DONE AFTER EOR APPROVES DESIGN, INCREASED MEMBER THICKNESSES AND ADDITIONAL STRUCTURAL SUPPORTS MAY BE NECESSARY. DRAWING SUBJECT TO CHANGE ACCORDINGLY. Shop Drawing approved in BT105-REC-00152