Metropolitan Park District of Tacoma Point Defiance Park Boat Lift Improvements Bid# J ADDENDUM TO BID

Transcription

1 Metropolitan Park District of Tacoma Point Defiance Park Boat Lift Improvements Bid# J ADDENDUM TO BID Date Prepared: October 3, 2017 Addendum No.: TWO (2) The following modifications are hereby made part of the contract documents: ITEM 1: Responses to Contractor Bid Questions. ITEM 2: Water Level Controls sensor cut sheet. ITEM 3: Revised drawing E-2 showing revised conduit sizing. ITEM 4: Revised drawings S3.0 and S4.0 showing addition of passive cathodic protection of in-water guide rails. ITEM 5: List of Elevator Companies End of Addendum #2 Point Defiance Marina Boat Lift Improvements Addendum #2

2 ITEM 1: The following questions were received as of the date of this addendum. Answers are given below each question. 1. Question: On sheet S-3.3 detail 03 note 4 it states stainless steel P1000 HS Unistrut X 1 4 long on 5 0 centers, on sheet E-1 basic electrical requirements 1.5 codes, ordinances and regulations it calls for compliance with the national electric code nfpa70. In order to comply with article support of rigid pvc it needs to be supported at 3 0 intervals for the 1 conduit. Answer: Conduit supports shall be in compliance with NFPA 70. S3.3 should read 5-0 O.C. maximum. As required, the spacing shall be reduced based on conduit size. For this project, however, the under-pier conduit sizes have been increased to 1-1/4 diameter, which has a corresponding support spacing of 5-0 on center maximum per NFPA 70. Please see revised sheet E Question: Where is the building steel located that I am to bond a 1/0 copper wire to the new immobile elevator support steel located as per sheet E-1 3.8c. Answer: For Grounding at lifts 1 & 2: Provide #1/0 stranded, insulated XHHW conductor to bond the steel beams together with the new guide rails are welded to. Install at ceiling level. Connect bonding conductor to beams with UL Listed tinned copper, double hole, mechanical connectors coated in high grade No-Ox compound. Additionally, coat any exposed conductor at the lug with No-Ox. Make single tap connection from bonding conductor to a #4 insulated XHHW grounding wire routed back to the panelboard ground bus. For Grounding at lift 3: Provide #1/0 stranded, insulated XHHW conductor to bond all steel guide rails together. Install at ceiling level. Connect bonding conductor to rails with UL Listed tinned copper, double hole, mechanical connectors coated in high grade No- Ox compound. Additionally, coat any exposed conductor at the lug with No-Ox. Make single tap connection from bonding conductor grid to a #4 insulated XHHW grounding wire routed back to the panelboard ground bus. 3. Question: I couldn t find any access under the floor in the bait shop, flag note 7 on sheet E-2 is the floor to be removed to run the conduit? Answer: As required, a portion of the raised floor may be demolished and re-built to provide access. 4. Question: Would it be possible to install the new conduit to lift 3 under the dock similar to lifts 1 and 2? Answer: The majority of the pathing for the under-pier conduit between lifts 1&2 and the bait shop is tight under the pier deck in order to minimize exposure to floating debris. Under-pier routing between lift 3 and the bait shop that provides similar protection was not found during the design phase. At their sole discretion and risk, the contractor may bid alternate routing. This addendum shall not be construed as providing approval for any alternate routing, which Page 2

3 will require review and approval from engineering and Metro Parks prior to implementation. 5. Question: On Drawing E-4 & E-6 item 5 on both drawings, is what I am trying to figure out. I see it s a level sensor, but could you give me any more information about it? Answer: A cut sheet from Water Level Controls of the sensor specified on sheets E4 and E6 is included as Item 2 of this addendum. A two probe sensor as specified, or an equivalent sensor from an alternate manufacturer, shall be used. 6. Question: It was brought up at yesterday s prebid meeting for the Point Defiance Marina Boat Lift project that a portion of the lift work needed to be performed by a licensed elevator mechanic. Drawing S1.0 structural notes indicate this work as inspection and replacement of wire rope and the replacement of lift sheaves. Please confirm this is the only portion of the work required to be performed/managed by a licensed elevator repair mechanic. Answer: Washington State Labor and Industries was contacted regarding this issue, and they made some preliminary determinations. The preliminary determination was that any work performed on the conveyance motor, cabling, or brake system would need to be conducted by or under the direct supervision of a licensed elevator contractor or mechanic. Other portions of the work, including the lift car fabrication (including sheaves), guide rail replacement, and electrical controls replacement, could be performed by a general contractor or their sub-contractor(s) who have current experience in the type of work being performed. This preliminary determination is being reviewed by Labor and Industries, with a final determination not expected prior to award. As such, bids shall include the services of an elevator contractor or mechanic for the limited scope identified above, in coordination with the work required in the design documents. If a final determination alters the scope of services required to be performed by a licensed elevator contractor, then the awarded contract will be amended or the contract will be altered and re-bid at the discretion of Metro Parks Tacoma. 7. Question: Knowing the dock has signs for 100PSF. What wheel loading capacity is there available and what total weight in what kind of proximity to each other is allowed? Example man lifts and forklifts working next to each other. Answer: The concrete dock is rated to 100psf. This translates approximately to the use of a 2-ton equivalent forklift with a maximum axle load of 12,000 pounds (85% front axle) or a personnel lift with two equal axle loads of 7000 pounds. A clear area of approximately 8-feet by 15-feet is required around and including the forklift where no other load is applied. Outside the required clear area, on-pier storage shall not exceed 75% of the rated live load, or 75 pounds per square foot. No load rating is available for the Wooden dock. As such, it is assumed that no more than a 1-ton forklift (6850 axle 85% front axle) or a personnel lift with 3000 pound axle loads may be used. For loading outside these bounds. it is the contractor s responsibility to design shoring or obtain independent engineering justification for a Page 3

4 higher load rating. Storage or staging of material shall only occur on the concrete portion of the pier with known, rated capacity. Loading outside these bounds, or more specific information about different vehicles, will be handled on a case by case basis. 8. Question: On sheet S.4, detail 08, note 1. Existing wire rope inspect and replace as required. Question(s); Who and under what criteria will the wire rope replacement be determined? If required, then what is the specifications for this material? Also, can the owner provide length, as the information is not found or attainable from the limited information provided in the contract documents? Answer: Per the GSN on sheet S1.0, the wire rope shall be inspected per the criteria noted in WAC (3)(U). The inspection shall be performed by a licensed elevator contractor or mechanic. If replacement is required, match existing wire rope diameter, with 5/8-inch diameter minimum. Use 6x36 Bright, IWRC wire rope, greased to prevent corrosion. Lay of rope and lay direction shall match existing (field verify). Bid may be based on regular, right hand lay. The length of replacement wire rope, if required, shall match the existing length, to be field verified by the contractor. For bid purposes, the following lengths may be used: Boat lifts #1 and #2 four long ropes for each car; Boat lift #3 four 60-0 long ropes. Page 4

5 ITEM 2: The following is a cut sheet for the sensor mentioned in question 5. The manufacturer s website: Page 9

6 ITEM 3: Under-pier conduit size was revised to be 1-1/4 inch diameter. What follows is revised sheet E-2. Page 6

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8 ITEM 4: Passive Cathodic Protection was added to the boat lift guide rails. What follows are revised sheets S3.0 and S4.0. Page 8

9 SITTS & HILL ENGINEERS, INC. CIVIL STRUCTURAL SURVEYING 4815 CENTER STREET TACOMA, WA PHONE: (253) FAX: (253)

10 SITTS & HILL ENGINEERS, INC. CIVIL STRUCTURAL SURVEYING 4815 CENTER STREET TACOMA, WA PHONE: (253) FAX: (253)

11 CHINOOK ELEVATOR SOLUTIONS TH ST E BONNEY LAKE, WA PIERCE County HILLSIDE ELEVATOR INC* Doing business as HILLSIDE ELEVATOR INC 3040 B ST NW #7 AUBURN, WA KING County LAUREL ELEVATOR INTERIORS INC Doing business as LAUREL ELEVATOR INTERIORS INC P O BOX MILL CREEK, WA SNOHOMISH County OLYMPIC ELEVATOR COMPANY* Doing business as OLYMPIC ELEVATOR COMPANY REDMOND WAY, SUITE 409C REDMOND, WA KING County MOORE ELEVATOR COMPANY LLC Doing business as MOORE ELEVATOR COMPANY LLC PO Box PUYALLUP, WA PIERCE County SCHINDLER ELEVATOR REDMOND NE 95th Street REDMOND, WA KING County

12 SHAW ELEVATOR COMPANY Doing business as SHAW ELEVATOR COMPANY TH STREET SE BOTHELL, WA SNOHOMISH County WEST COAST ELEVATOR LLC Doing business as WEST COAST ELEVATOR LLC ST AVENUE SOUTH #206 NORMANDY PARK, WA KING County ADVANTAGE ELV/ACCSS SYS CORP Doing business as ADVANTAGE ELV/ACCSS SYS CORP PO BOX 2978 ARLINGTON, WA SNOHOMISH County * These companies have previously worked on the boat lifts

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