INVITATION TO TENDER ITT / NO. PS BURRARD BRIDGE REHABILITATION QUESTIONS AND ANSWERS NO. 3

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1 FINANCIAL SERVICES GROUP Supply Chain Management ISSUED ON JANUARY 13, 2016 Q1 Drawing calls up TYFO-SCH41 to be used as the FRP product. Can a Sikawrap and Sika Epoxy system be used as an alternative? The product will most likely be Sikawrap 900C or Sikawrap 1400C. A1 Refer to Questions and Answers No. 2, Answer 54. Q2 A2 Q3 Are we allowed to affect traffic along Beach Avenue for a portion of the project? Yes, the Contractor will be required to maintain 2 way pedestrian, cyclist, and vehicle traffic. Single lane alternating traffic will be considered during off peak periods. Please confirm that page 8 of Overhead repairs may be toweled finished, refers to all of Zone 2? Page 5 of Concrete Removal for Repairs General question for this entire section. No matter how good we are at protecting the environment,traveling public or anything on the ground including boats and trees there will be some form of contamination either small dust particles and or milky colored water drops. Will the City advertize and or place appropriate signage letting the residence of COV know of this possibility and that additional maintenance may be required to wash boats and or anything else? A3 Yes the clause applies to all of zone 2. For notification of the marina users refer to Refer to Questions and Answers No. 2, Answer 7. Q4 A4 Q5 A5 Will any stored dragon boats, containers and or other stuff between columns 15 to 19 be moved? No. However, if the Contractor wishes to safely move and store these items this will be allowed. The Contractor will be required to notify affected parties if/when they are moving or storing items. Will temporary access be given on the west side, from column # 15 to Pier # 1 for a crane and or man lift if required? see attached pictures. And if so do you know of any loading restrictions where there are manhole covers shown in the picture? Access along the west side of the bridge will be granted on City controlled land. The Contractor will be expected to confirm adequate capacity for the equipment they intend to use.

2 Q6 Back to question # 10 please. Is it possible to verify/confirm that the aggregate is or is not Basalt black rock which can have properties of up to 90 mpa, prior to closing date? A6 Q7 A7 Q8 A8 Q9 A9 Q10 A10 Q11 No, the aggregate type for the existing concrete has not been confirmed. The project documents do not specify the type of Tyfo Anchors to be used at each location (i.e. glass or carbon anchors). Can it be assumed that the anchor type must match the fabric type with which it will be applied? For example, Tyfo Carbon Fiber Anchors must be used with Tyfo SCH-41 fabric and Tyfo Glass Fiber Anchors must be used with Tyfo SEH-51A fabric. Yes the anchor type is to match the fabric type. The project documents do not specify fiber anchor dimensions other than embedment depth and diameter. In order to properly develop the tension in the FRP strips, can it be assumed that the splay width and the splay length of the Fiber anchors must be designed using recommendations set forth in Kim and Smith s publication Pullout Strength Models for FRP Anchors in Un-cracked Concrete utilizing an interface bond strength of no more than 1000psi? The splay width and the splay length of the Fiber anchors must be designed using recommendations set forth in Kim and Smith s publication Pullout Strength Models for FRP Anchors in Un-cracked Concrete utilizing an interface bond strength of no more than 1000psi. We are assisting our contractors in providing a bid for the FRP STRENGTHENING section; strengthening of reinforced concrete girders and cap beams using fibre-reinforced polymer (FRP) materials. I am looking for some clarification on the Tyfo Anchors. Can you please supply load requirements for the Tyfo Anchors shown. Refer to Q8 above. There may be some access issues at PI-N which will need to be address with the marina-will communicating with the marina be done by the C.O.V.? The Contractor will be expected to communicate directly with the Marina, however, the City will help coordinate and provide contacts as necessary. Will the C.O.V. arrange to have boats relocated if necessary? A11 Refer to Refer to Questions and Answers No. 2, Answer 7. Q12 Has there been any site investigation in Zones 1 and 2 which has lead you to state there are only 36 square meters of Overhead Trowel Repairs- over an area greater than 5,000 square meters? Access along could be as much as $15,000 to $35,000 per square meter. A12 A sounding survey has been completed for zone 1. No detailed sounding survey has been completed for zone 2, estimates are based off of previous repair quantities between Piers 4 and Pier 6. Q13 Can you have a bid item for access only for Zones 1 and 2? Page 2

3 This would allow us to recapture the costs of access without the risk of quantities changing. This could be a big savings to the owner. A13 Q14 A14 Q15 A15 Q16 A16 Access costs will be added as separate payment items. Access costs for areas beneath the deck overhangs, sidewalks, and to the piers will be as a separate lump sum item. Additional access between the truss chords will be paid as a unit rate of access provided per sq. meter. If and when you add a bid item for access only could you also provide contract language that will allow recapturing the upfront costs of the access equipment on the first progress draw? See amendment for payment language. Please also identify the sounding/repair area boundary lines at the bottom of the piers? For piers 2 and 3, sounding and repairs will generally be completed from the truss bearing seats and above. For the remaining piers, repairs will be completed where required over the full extent. Is there access to the interior of the braziers at the North and South Abutments? If not, how is the cable to be installed through the braziers? No there is not access to the interior of the brazier towers. Conduit to be installed by fishing through cored holes as shown. Holes can be expanded for temporary access provided they are made good upon completion. Q17 There is an existing foundation where the 1.5m vaults are to be installed at Bent 2. Please provide info on the existing foundation A17 Q18 A18 Q19 A19 Q20 A20 Records for the existing bridge foundations are included in the record drawings that are available from the ITT FTP site. Existing concrete slabs, etc. can be demolished as required and the ground restored to a level or smooth gradient. The final location of the vaults may be field confirmed to the Contract Administrator s satisfaction. At Bent 3,4, 5 and others the diaphragm extends down from deck in-line with conduit run. Are we to core individual holes in concrete for hanger conduits? Core individual holes for the conduits. Field locate holes to avoid coring through primary reinforcing. At Pier 1 existing slope will need to be built up significantly in order to install 1.5 vaults as shown Can these vaults be installed away from slope? The final location of the vaults can be field adjusted to suit ground conditions subject to approval of the Contract Administrator, and achieving placement with an allowable number of conduit bends. At Pier 4 the existing slope will need to be built up significantly in order to install PMT and service kiosk vaults as shown Is there an alternate location for this equipment? The equipment is to be generally installed as shown. Field adjustment of the placement to suit ground conditions will be subject to approval of the Contract Administrator. Page 3

4 Q21 A21 Q22 A22 Q23 Is it possible to gain access to the inside of the Pier rooms where electrical work is to be done? Access to the Pier rooms is gained through hatches in the sidewalk. The City will not be arranging access to these rooms during bidding. For removal and installation of the new barrier can you provide the Safe Working Load of the existing sidewalk, this will help us with our means and methods for equipment choice? No a safe working load for the sidewalk will not be provided. The Contractor is responsible for temporary loading of the structure, and it is not practical to provide a single load scenario which addresses construction loading. Each piece of equipment will have a specific weight and loading pattern. With regards to temporary lighting requirements, what is the limit of how many existing lighting columns we can remove at any one time if we replace them with temporary lighting? A23 Refer to Questions and Answers No. 2, Answer 6. Q24 On drawing , Section E, they show 6-25M E/S going thru the outside beam, but on Section D, only 3 E/S come out. (see attached drawing). How many bars go completely thru the beam? Do they go completely thru or are they individual dowels? Are these just in a cored hole and concrete fills the void, or grout, or Hilt HY 200. If Hilti, will it not just push it out as you push the bar completely thru, or are these embedded.250 mm for 25M bar, each side? Same question for center beam? A24 Q25 A M E/S and 2-25M E/S shown on Sction D are the same as the 1-25M E/S and 2-25M E/S (total 6-25M bars going through the curb girder and center girder respectively). The additional 3-25M E/S shown on Section E are additional reinforcing between center girder and curb girder. Please refer to Schedule 2 Supplemental Specification page 13 of 14 item.14 Electrical Room Surge Protection Device. In this document - Advanced Protection Technologies E 18 XCS 10 4X is specified. On Drawing E102B SQUARE D EBA SP IS SPECIFIED. 1. Please confirm which manufacturer to use for this project. Square D EBA SP should be used Q26 Please refer to Schedule A items 3.33 & 3.39 Supply and Install Cathodic Protection For Pier 3 & 4 1. Please provide specification for Cathodic Protection System 2. Please provide Cathodic Protection Drawings for Pier 3 & 4 If the design of the cathodic protection system is to be performed by the GC, please provide the design parameters for the cathodic protection. A26 Refer to Questions and Answers No. 2, Answer 24. Q27 Please refer to spec section 3300, pg 4 of 11, section 3.3.1: a. This clause requires the use of a deck finishing machine for the sidewalk overlay. Please clarify if a deck machine is required for placement of the 3m sidewalk overlay. b. Deck removal is to be completed using a roto-milling machine, or alternate. i. Please confirm that the concrete deck to remain once scarified is able to support a roto- Page 4

5 milling machine. If this is undetermined, please provide the calculated load that the concrete sidewalk to remain is able to support without concern of punching through the remaining sidewalk concrete. A27 a) A suitable vibratory scree will also be considered with Contract Adminstrator Approval. b) Temporary loading is to be confirmed by the Contractor. As noted in Q22 above, confirmation of loading for each piece of equipment the bidding contractors may consider is not practical. Q28 Please refer to spec section 5500; a. Please confirm if the steel barriers and steel fences are to be galvanized AND powder coated, or simply powder coated. A28 Q29 Galvanized and powder coated shows the horizontal plates as both 25 x 63 and 19 x 63, can you confirm which is it. A29 Plates are to be 19 x 63. Q30 Please confirm that all welds on railing must be ground smooth / flush. All weld splatter must be removed. All welds must have silica deposits removed prior to galvanizing. A30 Refer to Questions and Answers No. 2, Answer 26. Q31 Please confirm that all edges must have a slight radius to prevent coating from peeling / cracking. A31 Refer to Questions and Answers No. 2, Answer 27. Q32 A32 There is not details on the horizontal members attaching to the post in the field. As it is typically over 15m between rail terminations there will have to be field splices. Is the intent field welding or a bolted splice? There will be between 1 & 2 field splices required per section. Field splices shall be welded, at locations approved by the Contract Administrator during shop drawing review, generally at main post to horizontal rail connections. Bolted splices in the fence will not be accepted. Q33 Drawings to 398 Please confirm if the 15.9 dia. & 12.7 dia. pickets are required to be continuous or segmented? If continuous drilling the horizontals will be required. A33 Q34 Pickets are to be continuous. Can you provide clarification for the required shear enhancement compared to the required layers of material for: -Dwg Zone G calls for 2 layers of SCH41 full coverage to reinforce 965 kn -Dwg Zone H calls for 3 layers of SCH41 full coverage to reinforce 1360 kn -Dwg Zone N calls for a single layer of SCH41 full coverage to reinforce 905 kn Page 5

6 A34 Refer to revised FRP drawings issued with Amendment #2. Q35 A35 Q36 A36 Q37 A37 Q38 A38 Q39 Please identified where the sounding will be terminated at the bottoms of all piers? Please bare in mind that there are boats parked right up against the piers Overhead Shotcrete Surface Patch Repairs 220 sq. m Overhead trowel Repairs 36 sq. m Trowel Applied Patch Repairs 6 sq. m. Refer to Q15 above. Is it possible to use the area south of Pier # 1 to column # 19 as another contactor staging area? Please see attached pictures. Yes, the Contractor can use this area for staging. Is there any possibilities of accessing hydro in the same area? Temporary access to hydro facilities are to be confirmed by the Contractor. Is the boat ramp right alongside pier # 1 available for our use? Yes, however coordination with the Marina is required to ensure that marina users are accommodated. How will pieces of lead paint debris which are not properly attached to the structure be dealt with if they become unattached? 2. Lead-containing Materials - disturbance of lead-based paint, particularly in older facilities. Also present in certain electrical circuitry and metal alloys;.e.g., overhead bridge crane maintenance/repair, high-voltage cable splicing services, boiler repair/tune-up services, fixture installation services, and chiller maintenance/repair services. Yes (Y) No (N) or Not Applicable (NA) A39 Q40 a) Inorganic lead-containing materials may be encountered b) A hazardous materials assessment for lead is provided in the tender package c) A hazardous materials assessment for lead is the responsibility of the contractor Lead paint is anticipated in the existing structure coating, primarily steel work. The existing structure is to remain in place. Good morning-can you tell me who installed the netting over the main span? Y Y N Page 6

7 A40 Pacific Ropes. Q41 A41 It is not necessary to submit copies of the reports and information contained within PART C - FORM OF TENDER Schedules M, N, O, P, Q, R, S, and T with your tender submission. Q42 A42 Refer to Questions and Answers No. 2, Answer 15. Q43 A43 Access stair refers to the ladders. Q44 A44 Access between the truss node and the floorbeam access would be over the truss chord. Q45 A45 Plate length will be field confirmed to suit installation, length will be approximately 1600 mm. Q46 A46 The access walkway shall be the Safety Grip Walkway from safety grating 24 Wide 11 GA S13501W Galvanized. No additional support under walkway is required. Safety walkway shall be fastened to each support angle by two 9.5 mm dia. Hex head bolt c/w safety-grip bolt seats 150 mm from the edge of toe board, total 4 bolts at each support angles Q47 A47 There is one platform at this location, railing is broken to allow existing structure to pass. Q48 A48 The height shall be site confirmed. The anchor bolt shall have minimum embedment length of 150 mm grout with HILTI HIT HY-200 Epoxy. Page 7

8 Q49 A49 The extent of demolition shown on drawing 366 should be to below sidewalk reinforcing, approximately 100 mm. Detail will be clarified by amendment. Q50 A50 Screen material will be confirmed by amendment. Material will be 50 mm x 50 mm stainless steel mesh installed at 45 degrees to form a diamond pattern. Q51 A51 Screen plates shall be stainless. The proposed alternative section is acceptable. Page 8

9 Q52 A52 Junction boxes are as shown on electrical drawings. Q53 A53 Refer to Question 25 above. Q54 A54 Refer to Questions and Answers No. 2, Answer 24. Q55 A55 42 is the correct number of Type A fixtures Page 9

10 Q56 A56 This refers to Type C fixtures Q57 A57 Q58 A58 Q59 A59 The quantity will be revised on the Schedule of Quantities and Prices. Section A refers to 15M dowels at 150c/c. Section B refers to 15M dowels at 300c/c. Please confirm the spacing of these dowels. We are not clear on the location reference in the drawing. One of our steel suppliers has requested more information about the Charpy V-notch test requirements for the steel piles. Can you provide further details about how the test is to be conducted (test conditions) and what the acceptance criteria are? The ASTM A252 specification sets tensile and composition requirements, but does not set Charpy toughness criteria. Charpy testing is not required for the pipe piles. Q60 Please refer to dwg , sections A and B: 1. Section A refers to 15M dowels at 150c/c. Section B refers to 15M dowels at 300c/c. Please confirm the spacing of these dowels. A60 Section A refers to stair reinforcing at 150, Secton B is referring to dowels at 300. Q61 A61 Q62 A62 Q63 A63 QUESTION: Drawing shows the 64 dia threaded bar we need with parts. I see it is to ASTM A307. It says 2 hex nuts but it looks like it should be 12, 1 anchor plate, etc. Could you confirm all the parts and quantities that go with this? Parts are as shown on the drawings; each set of hex nuts is a double nut. Below Deck Access - Where we are drilling or adding on to the existing structural steel i.e. At the Below Deck Access. Does the existing steel have to be abated for lead and repainted? For below deck access, connections are as shown on the drawings. Lead may be present at all connection locations. Below Deck Access Prior to accessing this area does the structural steel have to be cleaned of guano? The Contractor is expected to encounter notable amounts of bird guano. However, it is for the Contractor to determine if their access and work zone needs any guano removed to provide a safe working environment for Contractor personnel. Page 10

11 Q64 A65 Q66 A66 Q67 A67 Q68 A68 Q69 Bird Netting is a specialist contractor required to cut and repair debris netting? It is not debris netting and should not be expected to support falling debris. A specialist Contractor is not required to cut and repair the bird netting, however, the City will expect the bird netting to be restored to better or equivalent condition. Drawing Does the Safety Rope occur at all new floor beam access walkways? Yes Electrical - On drawing E134 is supply and install of PMT pad, PMT and conduit from PMT to manhole to be done by contractor? PMT pad, PMT and conduit to manhole shall be supplied and installed by others (BC Hydro). Please confirm that Cross Beam CB1B, at North Abutment only requires new facing concrete on only one side? Concrete facing on CB1B will be on both sides as shown on drawing to 318. Note that CB1B is located at the first interior cross beam, one bay south of the abutment face. Existing precast concrete barriers. Will City be taking possession of these or are they to be removed by contractor at completion of works? A69 Refer to Questions and Answers No. 2, Answer 37. Q70 A70 Q71 A71 Q72 A72 Q73 A73 Pavement Markings Are they required? And if yes then by who? Not mentioned in drawings? Reinstating line markings on sidewalk are by contractor. Contractor to place temporary lane markings upon completion. The City will install permanent lane markings. The hazmat assessment identifies bearings in PCB s on the bridge but states work will not encounter this. But in Quantities it refers to Pier 6 Bearing replacement? Will this replacement be involved in any PCB removal work? No PCB s are anticipated at Pier 6 bearings for the concrete approach spans. I see no reference to any lead base paint abatement but it is identified in the city hazmat survey? Lead paint is anticipated on the existing steel work. The Contractor iss responsible for worker safety, and shall take appropriate lead abatement precautions where required. Existing sidewalk overlay where are removing the existing concrete are you concerned about micro cracking on the underside of the soffit or the structural integrity until you complete the overlay? What is the safe working load of the side walk before and during demolition? Specification is unclear on the method to be used to remove the existing concrete can you please clarify your intensions here? For loading, refer to Answer 27 above. Page 11

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