PSXE 242001 Repair Interiors Exteriors Basewide Questions Response 09.04.24.docx

29 AUG 2024 PSXE 242001

1. Reference 5.4.2 Base Bid - Repair Airfield Spalls - The only drawing we could find in reference to the airfield paving was C2.1. Please provide the size and locations of areas to be replaced. Per 32 13 13 this concrete will be required to be put down with a concrete paving machine. Additionally, this spec has some stringent testing requirements that will add significant cost to the project. Is it the intent to fully comply with this specification for these repairs?

Specification Section 32 13 13, Part 3, Section 3.05 A describes the method(s) of execution for the placement of the concrete. Please refer to this section. Specifications are provided with the intent of full compliance. Any specific questions should be clarified during the bidding process or as a part of the submittal process after the project is awarded.

Locations of Spall repairs are included in the Scope of Work in paragraph 5.4.3.

First Spall is located on the Upper Apron just past the Control Movement Area Line, left of Centerline when heading North on Taxiway Golf as shown in picture in the project SOW. Dimensions of the one Concrete Pad to be replaced: 15’ x 20’ Second Spall is located on the Middle Apron, right of Centerline when heading North on Taxiway Golf as shown in picture in the project SOW. Both Concrete Pads being replaced on Middle apron are 15’ x 20’ each. Airfield striping must be repaired to tie into existing striping once new pad is complete.

Contractor is responsible for field verifying all dimensions.

2. 5.4.3 Base Bid – Repair Airfield Spalls: Contractor shall remove and replace (3) concrete pads located on the Middle and Upper Apron in accordance with attached plans titled “Airfield Slab Replacement” dated 4 April 2024. Contractor to field verify spall locations. Photos are for reference only, entire concrete pads must be replaced, not just existing patched areas.

a. Plans do not show location or size of concrete pads to be replaced. Can you provide additional drawings with these details?

See response to Question 1 above. Details for Spall repair shown on drawing C2.1 which is page 22 of the SOW. Contractors are encouraged to conduct a site visit to familiarize themselves with slab location and field verify dimensions.

3. 5.4.6 Base Bid – Construct Parade Field Sidewalk: Contractor shall construct a concrete pedestrian pathway from parade field to Briscoe Drive that will be directly in line and across from existing sidewalk at Building 102. Dimension width of new sidewalk shall be 6’ and shall include picture framing equal sizes around perimeter with a broom finish center. Contractor to demolish existing rock, hardscape, and section of the curb that intersects new pathway to create a sidewalk that is flush with the asphalt of the parade field, surrounding hardscape, and Briscoe Drive. Sidewalk shall be constructed in accordance with attached details. Contractor shall taper curb cuts towards new sidewalk. Contractor shall repair existing vegetative cover and hardscape such that the finished hardscape surface is a ¼” below the new sidewalk surface. Contractor will paint crosswalk, install (2) crosswalk sign and pedestrian crossing lights on Building 102 side of Briscoe Drive in accordance with attached details.

a. There is no plan attached showing site details and distances of new sidewalk.

Contractors are encouraged to conduct a site visit to familiarize themselves with sidewalk location and field verify dimensions. Data provided on SOW pages 13-16 is sufficient for contractor to understand project scope.

4. 5.4.9 Option 2 – Repair Bldg 416 Chiller: Contractor shall provide and install one (1) complete Trane split system, including air handler and condensing unit. The units will operate on R-410A refrigerant. Provide and install new refrigerant piping from AHU to CU. This will require some work above the ceiling. The new refrigerant piping will be routed identical to the existing. The refrigerant piping must be changed because the system uses a different refrigerant. Demolish existing refrigerant piping and dispose of it offsite. Provide BMS integration via Quad City Controls. Provide certified third-party testing and balancing.

a. There are no plans for Bldg 416. There is no Schedule for Trane System, or diagram of existing refrigerant piping from AHU to CU. Can you provide the necessary information or plans for this Option.

Design Basis is Model TTA30043CAAE02P for Condensing Unit and Model TWE30043BAAP01H for Air Handler. Contractors are encouraged to conduct a site visit to familiarize themselves with chiller location and field verify dimensions associated with all components to include the existing refrigerant piping.