Attachment 0010 - Addendum to Dirab AB Repair SOW.pdf

4.1.14.2 Joint Seals: Install joint seals between rigid (concrete) and flexible (asphalt) pavements along Taxiway Delta/Aircraft Parking stands and covered parking shades. Refer to UFC 3-260-02, Figure 12-35, Rigid-Flexible Pavement Junction. Contractor to field verify the actual location and linear measurement of the joint seal to be installed.

Addendum: Refer to Dirab Air Base AS BUILT Drawing B000-DAB-AB-C-671-01 (as provided):

Joint Between Taxiway Delta and Main Aircraft Parking Ramp to Include Ends (Drawing PART 1):

Cut concrete along Taxiway Delta to full depth at 30cm (1 foot) from edge and remove. Cut and replace asphalt along Taxiway Delta to full depth at 1 meter from edge. Remove existing aggregate base course material to depth of concrete. Install joint as per Drawing B000-DAB-AB-C-671-01, Section A – Joint Detail Between Rigid and Flexible Pavements. Install new base course material in accordance with SANG Dirab Air Base Project Specification Section 02241, Aggregate Base Course. Procedures for Hot Mix Asphalt shall be in accordance with SANG DIrab Air Base Project Specification Section 02241, Ashpalt Concrete Paving, WEARING COURSE ONLY. Place new wearing course hot mix asphalt in one lift of 11cm.

Joint Between Main Aircraft Parking Ramp and Support Facilities (Drawing PART II):

Cut and replace asphalt to full depth at 1 meter from edge. Remove existing aggregate base course material to depth of concrete. Install joint as per Drawing B000-DAB-AB-C-671-01, Section A1 – Joint Detail Between Rigid and Flexible Pavements. Install new base course material in accordance with SANG Dirab Air Base Project Specification Section 02241, Aggregate Base Course. Procedures for Hot Mix Asphalt shall be in accordance with SANG DIrab Air Base Project Specification Section 02241, Asphalt Concrete Paving, WEARING COURSE ONLY. Place new wearing course hot mix asphalt in one lift of 11cm.

Joint Surrounding Covered Aircraft Parking Areas (Drawing Part III):

Cut and replace asphalt to full depth at 1 meter from edge. Remove existing aggregate base course material to depth of concrete. Install joint as per Drawing B000-DAB-AB-C-671-01, Section A1 – Joint Detail Between Rigid and Flexible Pavements. Install new base course material in accordance with SANG Dirab Air Base Project Specification Section 02241, Aggregate Base Course. Procedures for Hot Mix Asphalt shall be in accordance with SANG DIrab Air Base Project Specification Section 02241, Asphalt Concrete Paving, WEARING COURSE ONLY. Place new wearing course hot mix asphalt in one lift.

4.1.14.3 Spall Repairs: Repair concrete edge spall IAW Industry Best Practices: Use UFGS for guidance.

Also, requires submittal for repair material, which meets the Tri-Service Runway Pavement Criteria; https://transportation.erdc.dren.mil/cacsites/TriService/pavement_repair.aspx

Recommendation from OPM-SANG Engineering: Recommend this paragraph be amended to say that this requirement shall be identified after contract award as a modification, which will require a joint survey between USG and awarded contractor to quantify repairs by size, and/or length, and location.

4.2.1 COMPASS ROSE MARKING:

Existing Compass Rose pad markings shall be blacked out with approved runway paint and shall be re-painted in accordance with requirements of UFC 3-260-04, Section 8-15.