Question_and_Answer__1.pdf

FA5004-15-B-C004 Thaw Shed Roof Answers to Questions #01

28 May 2015

Q1. Will the scope of work be modified to address installing new siding above where the EPDM flashing terminates to the next horizontal siding flashing with a counterflashing designed to shed the water from the existing flashing.

A1. No. Recommend removal of the retaining strip at bottom of panels to view existing membrane overlap installation.

Q2. SOW paragraph 6.2 states repair/patch metal deck as required to install new watertight roof system. Can this be quantified for bid purposes? If not will this be considered a change in conditions and subject to change order?

A2. Metal decking will not require repair/patch work, line has been removed from SOW.

Q3. Paragraph what should be 6.4 states to remove 9,923 SF of plywood decking. Site visit revealed that plywood decking present on overbuild area at west end of thaw shed roof only. Is the intent that all plywood at this area be replaced, or is over-framing to be removed and metal decking repaired/replaced?

A3. All plywood and existing insulation is to be removed and replaced with new per SOW and specs.

Q4. If over-framing per question #2 is to remain is insulation already present within the overframing? If not, does this area require new insulation?

A4. All plywood and existing insulation is to be removed and replaced with new per SOW and specs.

Q5. Paragraph 6.5 states to install R-38 flatstock insulation. Some roof areas may require tapered insulation to provide positive drainage. If this is the case is the stated R-38 to be minimum or average?

A5. R-38 is to be the minimum in all areas. Any tapered insulation is included and can be used at the contractor's discretion to meet specs and minimum grade for Low Slope Roof Systems. Contractor should know whether the roof has an existing structural design grade sloped for positive drainage or the need to adjust for any if any discrepancies and analyzed during the pre-sight visit. There are numerous methods used in the industry to check the slope of any roof system during filed surveys prior to bids.

Q6. Paragraph 6.6 states there are 5 roof drains. Site investigation revealed six existing roof drains. Please clarify.

A6. Address 5 ea. the other drain is an overflow scupper.

Q7. Site investigation revealed existing roof drains to be in satisfactory condition. Can existing roof drain bowls remain in place with new drain extensions and clamping ring installed?

A7. Replace with new drains and all associated hardware per specs.

Q8. Section 02070 Demolition paragraph 6.3 states the facility is ACM free. Site visit reveals the appearance of ACM containing materials at eastern most roof area (chute). Has this been tested for ACM? If not, how is this to be addressed?

A8. Section 02070 has been revised to state it may contain ACM, and Per Specfication 01030 (1.26E), the contractor shall be responsible for identifying Asbestos Containing Material (ACM) prior to conducting maintenance, abatement, renovation, and demolition.

The portion of the roof included in this project is believed to contain ACM for ACM is probable the project.

Q9. If it is determined the reference roof area per question #6 contains ACM can base landfill be utilized for disposal as noted in section 02070 paragraph 4.2.4?

A9. All disposal must be coordinated through the 354 CES/CEIEA IAW 1030 specification. Asbestos debris may be disposed of in Eielson's permitted landfill with coordination through the Insulation Shop and in compliance with the Waste Disposal/Borrow Pit Worksheet, Attachment E.

Q10. Section 07650 Flexible Flashing paragraph 6.2,10.5 and 10.15 that may be applicable to this project states steel sheet to be 20 gauge. Due to manufacturer minimums can 22 gauge be utilized in lieu the stated 20 gauge?

A10. Use 20 gauge per the SOW and the color to match base architectural standards.

Q11. Site visit revealed thaw shed roof areas have expansion joints of considerable size. Are these to be replaced or reused? If replacement required please identify limit of replacement.

A11. The large new expansion joints currently in place must be reused and protected.

Q12. Will an access ladder to the chute at east side of the building be required?

A12. The contractor shall adhere to the QTY stated in the SOW.

Q13. SOW paragraph 6.7 references repair by replacement fixed ladders. We find no specification section 05 51 33 regarding fabrication or installation requirements for the ladders.

Please provide.

A13. See attached document.