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View Enquiry: BE 2021-3004-046


Contract Details
Contract Number
2021-3004
Region
West
Tender Owner
MTO Capital
Location
Highway 6 / Hanlon Expressway
Highway
6
Length
2.3
QMS Declaration
Yes
Option A or B bidding
No
Contract Description
DESIGN BUILD MAJOR - Highway 6 / Hanlon Expressway Midblock Interchange
Tender Instructions
EXPRESSION of INTEREST must be received electronically as prescribed in the Expression of Interest document by 1:30:00 P.M. local time on: June 16, 2021
Contract Dates
Tender Advertise
12-May-2021
Tender Opening
18-Nov-2021 at 01:30:00 PM
TRF Submission Opening
21-Oct-2021
TRF Submission Closing
12-Nov-2021 at 12:00:00 PM

Enquiry Details
Enquiry Date
28-Jul-2021 at 10:34:26 AM
Type
Special Conditions
Subject
Structural steel
Enquiry
RFP 2.4.8.2 bullet 4 (either bridge) noted that any structural steel to concrete interface shall be detailed and/or protected such that no rust staining of the concrete occurs. Structural manual provided method to control stain but it is unclear how rust free at concrete is achievable. At the SDR, for aesthetic purposes, pier cap is removed, and typical for rust groove cannot be applied. Can the Ministry provide acceptable rust control/elimination method at concrete? i.e. groove at individual column, sealer, drip tap, or a combination of such to be acceptable methods. or please clarify the requirement and provide reference/example of approved methods.

Response Details
Response Status
Completed
Response Date
06-Aug-2021 at 09:46:52 AM
Response
The following provisions will be considered adequate to control the appearance of rust staining: • Drip tabs shall be used at all substructure elements located downstream of a drip path in accordance with Section 8.8.1 of the structural manual. • Bearing seat slopes and rust control grooves shall be detailed at semi-integral abutments in accordance with Figure 5.3.1 of the Structural Manual. • Bearing seat (top of column) slopes, bearing seat rust control grooves and a pair of vertical rust control grooves, analogous to those shown in Figure 6.3.2a of the Structural Manual, shall be used at all pier columns. At piers, vertical grooves shall be oriented away from the bridge elevation view to minimize visibility to motorists. • Rust staining in the purpose-designed grooves is acceptable.