A10_-_140P5323R0002_Questions_and_Answers_0001.pdf

140P5323R0002

Congaree National Park Roof Project

Questions and Answers

1. Is a contractor’s license for the State of South Carolina is required to bid the project?

a. License is not required.

2. Where is the staging area for visitor center, access?

a. Employee lot in the in back of building

3. Can we shut off access to the visitor center/main entrance?

a. No. Access of the walkway/building is the main entrance to the park, the options are;

i. maintain safe passage of public access through building while work is being performed

ii. close off one side at a time to continue use of visitor center/bathrooms to the public. This option will have very limited time constraints and not be allowed during peak visitor times.

4. Copper Drip edge on visitor center?

a. Visitor center and visitor center well house to remain replacement of copper drip edge

5. Drip Edge on buildings – Brown Drip Edge

a. Outdoor Classroom - No drip edge

b. Fire Suppression Building – Requesting Brown Aluminum Drip edge

c. Comfort Station – Brown Aluminum Drip Edge

d. Learning Center Dormitory Building and Kiosk – no drip edge

e. Learning Center Well House – no drip edge

f. Learning Center Annex Building – no drip edge

g. HQ Well House – Copper Drip Edge

h. Maintenance Building – Brown Aluminum Drip Edge

6. Identification of utilities around buildings

a. Contractor is responsible to call dig safe and coordinate to confirm all utility identification with NPS

7. Is there roof/attic insultation?

a. 20% replacement applies to all buildings

8. All sheathing is currently OSB for visitor center, are we changing decking out to plywood?

a. Yes, new plywood is to be installed on all building, except the outdoor classroom

9. Can we rope sections off to keep the public out?

a. Yes. Sections can be closed with park approval and public access to buildings must be maintained.

10. Dumpster Location?

a. Can be employee parking lot

11. There are multiple fire exits around buildings do we need to keep them clear?

a. Yes, maintain all fire exits clear.

12. Can we drive on grass?

a. No heavy equipment due to utilizes

b. Weight limit on non-paved areas is limited to 11,000 GVWR

13. Can we spray for bees?

a. No spraying for bugs

14. Same shingle on all buildings except for outdoor class room?

a. Yes

15. Copper drip edge on all edges visitor center and HQ well house

a. Yes.

16. Trusses to be replaced on Fire Suppression Building?

a. Yes based on specifications existing rafter are to be replaced with trusses on fire suppression building

17. Fire Suppression Building currently has galvanized drip edge?

a. Brown aluminum drip edge to be used on all buildings outside of the headquarters building and well house that require copper.

18. Soffit and Facia replaced on Maintenance Building?

a. Soffit and Facia are not included. Damage due to work performed under this contract will be repaired or replaced in kind.

19. Is the SF 16000 total amount of footage for the visitor center?

a. This is an estimated number , it is on the contractor to verify SF of visitor center and all buildings. Rough Estimates can be calculated from drawing provided.

20. Is the small kiosk in front of the learning center dormitory building included?

a. Small kiosk is included with the learning center dormitory building.

21. Learning Center Dormitory building and Annex building have gutters?

a. Gutters are not included in the contract and must be salvaged and reused

22. Where are Smoking areas

a. 25 ft from any building

23. What are the working hours?

a. 7AM-5PM, Monday – Friday; weekends may be coordinated if staff is available

b. Dormitory hours are only 9am-5pm, Monday - Friday

24. Plywood?

a. Yes all buildings require new plywood decking according specifications

25. Steel Plywood Clips required?

a. Yes

26. Underlayment requirements?

a. Specifications are in in Section 07 31 13. Specifically Section 2.2 calls outs:

A. Underlayment (Water Resistive Barrier): Waterproof shingle underlayment, SBS modified asphalt saturated fiberglass mat, Type I, similar to

GAF Roof ProTM Underlayment.

1. Nails: Use only plastic cap roofing nails to attach underlayment, staples shall not be used.

B. Ice & Water Shield: Fiberglass mat impregnated and heavily coated with an SBS modified asphalt, 60 mils thick, self-adhering back with release paper.

Further on in the specification in 3.4 it outlines installation requirements including if the slope of the roof is less than 4:12 that 2 layers of underlayment are required.

For more more specific information, IBC in Section 1507.2.3 Underlayment states: Unless otherwise noted, required underlayment shall conform to ASTM

D226, Type I, ASTM D4869, Type I, or ASTM D6757.

27. Outdoor Classroom

a. No insulation, no plywood, replacement of materials specified in specifications.

28. Ranger Station is in the drawings but not included in the project

29. Are there liquidated damages

a. No Liquidated Damages

30. How many fall protection anchors are there?

a. Contractor to verify with specification and drawings, there are approximately 24 on visitor center

31. RFI’s regarding the shingle specifications. The two listed are a. Malarky Northwest XL fiberglass laminated shingles b. GAF Timberline® Cool Series c. or approved equal

Going over the specs with our supplier, is there a specific specification about these shingles that the NPS wants in particular that differs from a more traditional asphalt shingle?

a. Architectural shingles with required specifications to include:

Warranty - 20 year or better

Alge block warranty - 20 year or better

Wind speed warranty - 70 mph or better

Fire Rating - Class A (Highest)

**3-Tab shingles will NOT be accepted.

32. There is a transitional valley where the shingles are currently weaved on the visitor center. Does the engineer want us to install copper valley flashing and finish with an open valley or California cut? *most shingle manufacturers do not recommend weaving valleys

a. Copper valley flashing with an open valley.

33. What are the sheet metal requirements (gauge & composition – steel, aluminum, copper) for drip edge, step flashing, & counter flashing for the shingle roofs?

a. Sheet metal requirements are outlined in the specifications. For flashing this is in

Section 07 62 00. Part 2.1 states the material requirements and Section 2.3 goes over gauge sizes. For the roofs that we did not specifically look at, we have it called out to replace items in kind. For bidding purposes, I would assume 22 gauge as that is the thicker size we called out in these specifications and the sheet metal conforming to ASTM A792 following material requirements in 2.1. On https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fup.codes%2Fviewer%2Fsouth_carolina%2Fibc-2015%2Fchapter%2F2%2Fdefinitions%23underlayment&data=05%7C01%7CCharles_Aznive%40nps.gov%7C492d1c77c0364ea9df6608db2181d216%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C638140613737230181%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=v0VGGZ%2Fievri10%2BWrOTJg8IgiAxLELof%2BE%2FsKuWd0oE%3D&reserved=0 buildings where copper is the replacement specifications will be in kind to existing.

34. Scope of work states to anticipate replacing 20% of the existing roof insulation and roof structural members. For the insulation, we noted during the site visit that one of the buildings currently has R19 batt insulation. Are we to go back with R-19 batt insulation at all of the roofs where we are anticipating replacing the insulation? If not, what R-Value batt should we go back with when replacing insulation?

a. R-19 should be anticipated for replacement where insulation is needed.

35. Where are the technical requirements for the proposal?

a. Technical requirements for the proposal are located Page 54-56 on solicitation form 140P5323R0002.