RFI Response 1 W50S7U-21-B-0001.pdf

DCFT 102008 – Repair CRF, Building 17 Pre-bid RFI’s

Industria Construction Services:

1. Per Survey prepared by Environmental Design International there is 12,750 SF of ACM roof caulk. Is abatement contractor responsible for tear off of all corrugated metal panels on roof?

The abatement contractor may remove the panels after ACM caulk has been abated.

However, panel removal may be performed by others once the regulated area has been released to the general contractor. Alternatively, abatement can be done at ground level. The ACM caulk is not friable; the abatement contractor may elect to abate the panels in this manner (in a regulated area). Alternatively, the abatement contractor may elect to dispose of all panels as asbestos-contaminated waste. – EDI

2. Are all corrugated metal roof panels considered to be asbestos containing material?

Only the seam sealants are considered asbestos-containing. Once abated, metal panels can be recycled. – EDI

3. Drawing HZ-002 lists entire exterior (walls, roof, etc.) as having suspect ACM caulk. Is abatement contractor responsible for removal of all exterior corrugated metal?

See response No. 1. – EDI

4. Asbestos abatement spec note 7 says work to be performed in negative pressure containment. Does this apply to exterior corrugated metal and caulk removal by abatement contractor?

Only interior abatement areas must be monitored. Exterior abatement may be abated using drop cloths and regulated areas, but air monitoring is not required. – EDI

5. Is abatement contractor responsible for hiring of 3rd party air monitoring, daily oversight, project design?

Yes, The general contractor or the abatement contractor must retain the third party air sampling professional. Abatement design and oversight is delegated to the contractor per the specifications. – EDI

6. Is abatement contractor responsible for providing daily oversight/air monitoring during exterior asbestos abatement?

Air monitoring is not required for exterior abatement. The general contractor or the abatement contractor must retain the third party oversight professional. – EDI

7. What is the proposed phasing of the project? Are all metal walls/roof with ACM caulk to be removed prior to other work beginning?

Project phasing is the responsibility of the general contractor. – EDI

The Mantle Group:

1. Please clarify if a tax exemption letter will be provided for this project.

Yes. Tax exemption letter will be provided. – EJM/ILANG

2. Detail 12/S-002 calls for dowels at 12” oc at control joints. Please clarify if the dowels are required at all control joints.

Yes, dowels are required at all control joints. – RMF/Hanson

3. Drawing AE-601 - Should Note #2 on the Room Finish Schedule say “West” Curtainwall infill in lieu of “East”?

Yes, the note will be revised to read ‘WEST CURTAINWALL”. This revision will be answered in a future Addendum. – FSB

4. Does the existing framing above the West Curtainwall Infill get painted?

No, painting is only required at the “FIVE (5) EXISTING MAIN FRAME COLUMNS AND BEAMS.” Refer to Room Finish Schedule (note 1) on AE-601. – FSB

5. Drawing AE-310 Details 2 & 3 – Is liner Panel required above the New Curtainwall Infill? If so, what face will it be located…on the new 6” CFMF?

No, liner panel is not indicated or required. – FSB

6. Drawing AE-601 – The Room Finish Schedule for the Exterior Walls in Rooms 106, 107, 108, 109 and 110 call out PT-1 for Wall Finish. The Wall Sections in these areas shown on AE- 311 show 1 ½” Liner Panel. Please Clarify.

The liner panel is prefinished, no additional painting is required. The exposed CMU is required to be painted as the Finish Schedule indicates. – FSB

7. Drawing AE-601 – The Room Finish Schedule calls out for the existing main frame columns and beams in Room 100 to be painted. Please clarify if the existing columns and beams that will be exposed in other rooms are to be painted or left as existing.

The Room Finish Schedule calls out for “the five (5) mainframe columns and beams to be painted.” The beams and columns in the other areas are to be left as existing. – FSB

8. Note C on AD-101 states that all Exterior CMU walls are to remain West of Column Line

6. There is a CMU wall on CL E between CL 2 and 4. No infills or new openings in CMU are shown on the Architectural or Structural Drawings. If CMU wall is to remain, please provide wall sections in finished Rooms such as 105 & 104 that call out for the North wall to receive ceramic tile and Room 106 where we assume the North wall will receive a metal liner panel. If CMU wall is to be removed, we assume that exterior wall will be infilled with 8” CFMF and Drywall or liner panel installed. Please clarify.

Note C is incorrect. The Demolition Plan line type indications are correct. The walls indicated by a dashed line are to be demolished, the walls indicated with a continuous line are to remain. – FSB

9. Drawing AE-311 Wall Sections 3, 4, 5 & 6 call out Detail 10/AE-500. This detail shows a new concrete curb at the exterior wall. Please clarify that this concrete curb is only required at existing door infills since the foundation is already 6” higher than SOG. Also, is any rebar or dowels required in these curbs?

The curb is to be 6" tall over the width of the foundation wall and stop inside the gypsum board. The curb is to have (2) #4 bars continuous over its length and #4 dowels at 18" O.C.

drilled and epoxy grouted into existing foundation with 4" embedment and stop 2" clear of top of curb. – Hanson

10. AE-310 Wall Section 4 calls for 1 ½” Metal Liner Panel; AE-310 Wall Section 1 calls for Liner Panel; AE-311 Wall Section 2 calls for 4” Insulated Metal Liner Panel; AE-311 Wall Section 1 calls for Liner Panel. Please clarify the location of the 4” Insulated Metal Liner Panel and the 1 ½” Metal Liner Panel in Sheet Metal Shop 100.

The notes and arrows on 4/AE-310 are correct; One note on 1/AE-310 will be changed to read,”4” ACOUSTICAL LINER PANEL” instead of “LINER PANEL.” The notes and arrows on 2/AE-311 are correct; One note on 1/AE-311 will be changed to read,”4” ACOUSTICAL LINER PANEL” instead of “LINER PANEL.” The acoustical liner panel is required on the North and South high-bay walls only. Changes will be made in a future addendum. – FSB

11. AE-301, AE-310 AND AE-311 – Where the air barrier system is shown on the interior face of exterior walls where there is either 1 ½” metal liner panels or 4” acoustical metal liner panels, is the liner panel being used as the air barrier or should a vapor barrier be added behind the liner panels?

The exterior insulated metal wall panels and the Standing Seam Roof System are acting as the air barrier. – FSB

12. AE-301 General Note A states “The Contractor shall refer to specifications sections 07 05 23 and 07 27 10.00 10 for all air barrier system and testing requirements.” We are unable to find these specs in the project manual. Please clarify if contractor will be responsible for performing the air barrier testing or if it will be done by a third party provided by the government.

The requirement for the Air Barrier is for “Inspection Only.” According to UFC 3.-101-01 PARAGRAPH 3-6.3, a maintenance area or hangar bay facility is not required to undergo testing, only inspection. Refer to the amended notes on Sheet AE-301 and AE-002 answered in future addendum. – FSB

13. AE-311 Wall Section 5 shows a 3” EPS Insulation Board, all other Wall Sections show a 4” EPS Insulation Board. Please clarify if all EIFS EPS Insulation on the North side of the Hanger is 3” and 4” on the South side of the Hanger.

We will change the note to read,”4” EPS INSULATION BOARD” in the forthcoming addendum. – FSB

14. AE-103 – We are unable to find specifications on the following items:

a. #12 – Desk 60” x 30”

We will change the note to read,”4” EPS INSULATION BOARD” in the forthcoming addendum. – FSB

b. #18 – Foldable ADA Accessible Shower Bench

FSB will specify the Shower Components in the forthcoming addendum. – FSB

c. #19 – Shower Curtain and Rod

d. #21 – “L” Shaped Grab Bar

e. #27 – Recycle Bin

The recycle bin is Government Furnished, Government Installed (GFGI) – FSB

15. Specification Section 102800 calls out 2.2.D Waste Receptacle and 2.3.B Mop and Broom Holder. We are unable to locate any of these on the drawings. Please clarify that these are not required or provided by others.

Note #11 indicates a Paper Towel Dispenser, mount the Waste Receptacle directly below and centered on that Dispenser. The bottom of the Waste Receptacle to be mounted at 12” above the finished floor so that it is in the detectable cane range for ADA. There are no Mop and Broom Holders in the Project. – FSB

16. Specification Section 104416 Fire Extinguishers – We are unable to locate any fire extinguishers on the drawings. Please clarify that these are not required or provided by others.

Fire extinguishers will be added on A-002 – CODE AND LIFE SAFETY PLAN in the forthcoming addendum. – FSB

17. AE-401 Details 6, 8 and 9 call for a Solid Surface Counter and Backsplash. The specifications we have for countertops is 123623.13 – PLASTIC-LAMINATE-CLAD COUNTERTOPS. Please Clarify.

The countertops will be solid-surface as indicated on AE-401. – FSB

18. Specification Section 334200 2.3 Downspout Shoes states that we are to match the shoes on Buildings P-1 and P-16. Please provide cutsheet or a photo of existing shoes so we can match.

ILANG will provide photo of existing. EJM/ILANG

19. The following is a Jib Crane RFI from Steve Roach with McLaughlin Hoist & Crane:

SECTION 145100 – JIB CRANE AND HOIST

B. Free Standing Jib Crane anchored to new concrete foundation:

1. Contractor Provide: Design, manufacturing, shipping, and installation of one (1) free standing, manually operated, jib crane with rotating boom assembly. Crane to include push trolley and (1) 2-ton hoist, electrification, festooning system, controls, and mounting hardware:

a. Jib boom rotation to be motor operated

2. Controls:

a. Primary point of control shall be via 2-button pushbutton station suspended from an independent C-Track festoon system running the length of the monorail, and shall be wired with removable connector plugs to allow for storage in clean area:

The above is conflicting information. If the hoist motion is motorized and the jib boom has motorized rotation, it changes quite a few things about controls. At least, we will need a 4-button pendant station.

My actual suggestion is different altogether. Have you considered wireless radio controls for these units? The most modern, convenient, and reasonably priced option is a wireless radio setup with a mounted receiver and hand-held remote. If we are building new cranes for our customers, we are using radios. It is less expensive than the controls and additional c-track and festooning for a dedicated pendant track on both the monorail and the jib crane in this project. Wireless radio control systems would be supplied with the control receiver and two hand-held transmitters, main and spare.

Does the jib rotation need to be motorized?

Do I have permission to use wireless radio controls as opposed to pendant controls for this project?

Please provide pendant style controls as specified. EJM/ILANG Please provide pendant style controls to operate the hoist lift and jib boom rotation.

RMF/Hanson

J&B Builders.

20. Per Survey prepared by Environmental Design International there is 12,750 SF of ACM roof caulk, which is the same SF as the roof. Is there any ACM roof caulk other than around the perimeter of the roof? Is there caulk between the roof panels and if so, what is the lineal feet of this?

There is ACM roof caulk used throughout all roof panel seams. The estimated amount is 13,000 LF of roof caulk. Contractor is required by the specifications to field verify all quantities. – EDI

21. Drawing HZ-002 lists entire exterior (walls, roof, etc.) as having suspect ACM caulk. Are we to bid this project with removal of any ACM caulk other than at the roof line? If so at what locations?

All caulk on roof panel seams, wall panel seams, louvers, exhaust fans, and doors and windows and any other sealed openings are considered to be asbestos-containing and must be abated. – EDI

22. Asbestos abatement spec note 7 says work to be performed in negative pressure containment. Does this negative pressure containment relate only to the work on the inside of the building? Can drop cloths be used for the exterior roof abatement rather than the negative pressure containment?

The use of drop cloths and regulated areas is acceptable. Abatement design and oversight is delegated to the contractor per the specifications. – EDI

23. Is the 3rd party air monitoring, daily oversight, required for the interior and exterior abatement, or for the interior abatement only?

Interior abatement areas only must be monitored. Exterior abatement must be abated using regulated areas, but air monitoring is not required. – EDI

24. Drawing SD-101 shows the interior concrete to be removed and has the various sections at the wall. Can you tell us what the thickness is of the concrete?

Refer to Keynote #1 on Sheet S-001 for description of the existing slabs to be demolished.

The “Hanger” is the portion of the building between Grids B and D and Grids 1 and 5.

RMF/Hanson – EDI

25. On drawing AE-301 note A, there is a note instructing us to view the air barrier requirements in section 07 05 23 and 07 27 10.00 10. Where can we find these sections?

They are not in the specifications.

These specifications will not be required. The note will be revised in the forthcoming addendum to say “ACCORDING TO UFC 3.-101-01 PARAGRAPH 3-6.3, THE FACILITY

REQUIRES INSPECTION ONLY. CONTRACTOR SHALL NOTIFY CONTRACTING OFFICER WHEN

INSPECTION IS SCHEDULED.” This maintenance facility is not required to undergo testing, only inspection. – FSB