RECOVERY - Replace the Roofing Systems on Buildings No. 1, 2, 4, 9 and 12 at the Mississippi State, MS location

Site Visit Questions and Answers Solicitation No. AG-4431-S-10-0001
Replace Roofs, Buildings No. 1, 2, 4, 9 and 12 USDA, ARS, Mississippi State, MS

AMENDMENT NO. 2

BID DATE IS CHANGED: December 16, 2009 @ 2:00 p.m. cst.


1. Clarification to Specification: Section 07 52 00 Modified Bitumious Membrane Roofing
Part 2:
2.1 Modified Bitumen Sheets and Fiberglass Felt Materials

a. SBS Base Sheet: ASTM D 6163, Type II, Grade S, Minimum 2.0 mm (80 Mils) thick.

SHOUD READ:
a. SBS Base Sheet: ASTM D 6163, Type I, Grade S, Minimum 2.0 mm (80 mils) thick

AND
b. SBS Interply Sheet: ASTM D 6163, Type II, Grade S, Minimum 2.0 mm (80 mils) thick.

SHOULD READ:
c. SBS Interply Sheet: ASTM D 6163, Type I, Grade S, Minimum 2.0 (80 mils) thick.

2. Section 072200-Paagraph 2.1.4 states Building 1 is to receives a 1/8" per foot tapered system. However, the Roof Plan on Page A100 denotes both 1/8" per foot slope. Which is desired?

Due to existing flashings and weeps at the vertical surfaces the slope needs to be 1'8" per foot.

3. Will G.A.F be accepted as equal?
Yes, if it is equal to the specifications as stated.

4. Does 150 calendar days include rain days?

Confirmed, only actual rain days will be added to the 150 days.

5. If there is no Vapor Barrier, is one required? If required, how many ply, and what type material?

Contractor shall provide a Bituminous Vapor Retarder as follows:

Two plies of Type IV 35mil. Glass finer ply sheet applied in conjunction with
three moppings of hot steep asphalt or in conformance with manufacturers
recommendations.

Amendment No. 1, this amendment answers questions/clarifications raised a the site visit, all other terms and conditions remain unchanged, bid has not been changed.

Site Visit Questions and Answers Solicitation No. AG-4431-S-10-0001
Replace Roofs, Buildings No. 1, 2, 4, 9 and 12 USDA, ARS, Mississippi State, MS

1. Confirmation that viable weather will be the only days counted in the 150 day turnaround time.

Confirmed, only actual rain days will be added to the 150 days.

2. The spec of the 4 inch strap to hold downspout should be approved or re-evaluate

The specifications call for 2" straps.

3. Drainage Gutter System to that specific flow instructions. As far as whether or not, they would rather have galvanized or ceramic coated fasteners.

See specifications for fastener material type. Basic principal is that the fastened shall be
approved by the manufacturer of the material being fastened. Stainless steel is the default fastener material.

4. Any Preferred vapor barrier fasteners. Should be specified in an addendum.

Fasteners shall be as recommended by vapor barrier manufacturer.

5. Specified areas for where dumpsters trash chutes and equipment storage areas are preferred to specify in detail.

Contractor staging area has been defined in another response included in the project
addenda.

6. Any preferred sites for recycling of materials accumulated during demolition should be noted.

There is no recycle requirement for this project.

7. Notice of whether the drains on building One building Two buildings Four building Nine building 12.

See project documents.

8. What will be the staging areas for each building?

A 120' x 20' staging area will be available in the parking lot to the east side of Building No. 2. The contractor shall supply 8' high gated chain link security fencing around staging area. All post hole penetrations into natural ground or paving surfaces shall be repaired at the end of the project. Any damage to paved surfaces, sodded areas, or landscaping shall be repaired at no additional cost to the government.
9. Will owner pay for materials stored in an offsite insured warehouse?
Yes, but the contractor will need to provide receipts for the materials prior to payment request.
10. Is the desired cover board to be ½" glass mat gypsum roof board (re: Section 072200-
Paragraph 2.2.1) or one of the other two listed in Section 072200-Paragraph 3.2.2.1?

As per Section 072200, 2.2.1

11. Are the tapered systems to be installed according to Section 072200-Paragraph 3.2 (1" base layer with ½" minimum tapered) or as shown on Details 1 & 2 on Plan Page A300 (1 ½" minimum tapered)?
See 072200, 2.1.4
12. Are gutters to be supported by aluminum brackets as described in Section 076000-Paragraph 3.1.15 and Table I or as shown on Details 1 & 2 on Plan Page A300?
Install as per 076000, 3.1.15

RECOVERY:  The U. S. Department of Agriculture, Agricultural Research Service, Mid South Area, intends to issue an Invitation for Bid (IFB) for a project entitled "Replace Roofing Systems on Buildings No. 1, 2, 4, 9 and 12" at the Mississippi State, MS location.  The scope of the work includes but is not limited to: demolition of existing EPDM roofing membrane, tapered insulation, treated wood nailers, metal roof edge, pipe, and curb flashings down to concrete roof deck buildings 1, 2, 4 and 9, demolition of existing ballasted EPDM roof system building 12, installation of fully adhered modified roofing system over fully adhered tapered insulation on buildings 1, 2, 4, 9 and 12, installation of all flashings, gutters and downspouts as indicated on the drawings.  The period of performance is150 days after receipt of Notice to Proceed (NTP).  The magnitude of construction is estimated between $500,000.00 and $1,000,000.00.  This is a 100% total set-aside for competition among 8a Contractors.  The NAICS Code is 238160, with a size standard of $14 million.  This is an invitation for Bid (IFB) and incorporates provisions and clauses in effect though Federal Acquisition Circular 1005-36.  Solicitation No. AG-4431-S-10-0001 is scheduled for release on or about November 4, 2009, interested contractors are to submit their requests for a bid package to: USDA, ARS, MSA, Procurement Office, P. O. Box 225, Stoneville, MS 38776-0225, or fax a request to 662-686-5468 or by email to terry.krutz@ars.usda.gov.  The request must include a mailing address, telephone and fax numbers and email address if available to receive one copy of the solicitation, drawings and specifications.  No calls will be accepted.  A pre-bid conference is scheduled for November 18, 2009 at 10:00 a.m. CT.  Any changes or additional information will be provided in the solicitation package.  Bids will be due by 2:00 p.m. CT on December 9, 2009.  A firm-fixed price contract will be awarded to the responsible offeror who submits the lowest bid.  All responsible 8a contractors may submit an offer which will be considered by the agency.  Contractors are required to register or update their registration at the Central Contractor Registration (CCR) website at www.ccr.gov in order to receive a contract award under this solicitation, and register or update their registration at the Online Representation and Certification Application website at http://orca.bpn.gov. RECOVERY