RFI_23.pdf

REQUEST FOR INFORMATION

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From:

Date:

To: Contracting Officer

1. Solicitation Number:

W91364-19-B-7001

2. Location of Project:

Mansfield Ohio ANG

3. Information Requested: (Include Specification Section and/or Drawing Number and Page if inquiring about a discrepancy)

1) Involving the Existing perforated metal ceiling, Note No. 1 on the RCP says to remove and reinstall. I am not sure if this will work out. There are a large number of penetrations in the ceiling that would make reinstallation extremely difficult if not impossible.

There would also be the issues of matching the existing suspension and perforated tiles with new materials where needed.

A. Is this note correct?

B. Is it anticipated that we will be able to store the removed material & then reinstall in exactly the same spot?

C. Can we get a little more clarification on what is expected for the ceiling?

2) It is noted in A‐112 and A113 for portions of the wall to be wire‐mesh partitions. There is no guidance for wire mesh partitions mentioned in the specifications. Please clarify the governments intended specification for this item.

Attachments:

Date Response Required:

By:

Title:

Requestor's FAX Number:

Requestor's Telephone Number:

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S P

O N

S E

To: Date:

Response:

1) Involving the Existing perforated metal ceiling, Note No. 1 on the RCP says to remove and reinstall. I am not sure if this will work out. There are a large number of penetrations in the ceiling that would make reinstallation extremely difficult if not impossible.

There would also be the issues of matching the existing suspension and perforated tiles with new materials where needed.

A. Is this note correct?

Yes, for bidding purposes, assume 20% of the panels and suspended panel grid will need to be replaced.

B. Is it anticipated that we will be able to store the removed material & then reinstall in exactly the same spot?

The system is modular, so most panels should not need to be reinstalled in exactly the same spot.

C. Can we get a little more clarification on what is expected for the ceiling?

The perforated metal ceiling panels will be removed and replaced. Where new or abandoned penetrations preclude panel replacement, new panels will be provided.

If exact replacements cannot be provided. The A/E will recommend an installation pattern to blend the new and existing panels in a manner that is aesthetically pleasing.

2) It is noted in A‐112 and A113 for portions of the wall to be wire‐mesh partitions. There is no guidance for wire mesh partitions mentioned in the specifications. Please clarify the governments intended specification for this item.

See attached specification 10 22 13.

This information is a clarification of the solicitation/contract and does not change the contract terms or conditions.

This information is a proposed change to the solicitation/contract. An amendment will be issued.

Contracting Officer:

X

REPAIR MX HANGAR

MANSFIELD, OHIO

Section 10 22 13 Page 1 PW\DEN001\669816 February 2019

SECTION 10 22 13

WIRE MESH PARTITIONS

08/16

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN IRON AND STEEL INSTITUTE (AISI)

AISI SG03-3 (2002; Suppl 2001-2004; R 2008) Cold-Formed

Steel Design Manual Set

ASTM INTERNATIONAL (ASTM)

ASTM A36/A36M (2014) Standard Specification for Carbon

Structural Steel

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Wire Mesh Partitions

Show layout, details, materials, dimensions, finishes, and all information necessary for fabrication and installation.

SD-03 Product Data

Wire Mesh Partitions

Submit for each type of partition, door, and window.

Recycled Content for Metal Post and Framing Materials;

Recycled Content for Wire Materials;

1.3 DELIVERY, STORAGE, AND HANDLING

Deliver materials in manufacturer's original, unopened containers or packaging with labels intact and legible. Deliver, store, and handle materials so as to prevent damage. Replace damaged or defective materials with new.

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1.4 DESCRIPTION OF WORK

Wire mesh partitions must be all wire type, normal duty for normal industrial use. Provide partitions complete with fasteners, capping bars, adjustable floor sockets, bracing, doors, hardware, and other items necessary for a complete, useable, and rigid installation.

PART 2 PRODUCTS

2.1 MATERIALS

Metal post and framing materials listed below must contain a minimum of 15 percent post-consumer recycled content and wire materials must contain a minimum of 50 percent post-industrial recycled content. Provide data identifying percentage of recycled content for metal post and framing materials. Also provide data identifying percentage of recycled content for wire materials.

2.1.1 Steel Shapes, Plates, and Bars

ASTM A36/A36M.

2.1.2 Cold-Formed Steel

AISI SG03-3.

2.1.3 Wire Mesh

Carbon steel wire, woven diamond mesh, intermediate crimped.

2.1.4 Floor Sockets

Cast or forged steel or ductile iron, adjustable, approximately 2-1/2 inches high.

2.2 NORMAL DUTY PARTITIONS

2.2.1 Wire Mesh

10 gage wire, 1-1/2 inch mesh.

2.2.2 Vertical Frames

1-1/4 by 5/8 inch cold-rolled C section channels or 1-1/4 by 5/8 by 1/8 inch channels. Provide only C channels where frames are installed toe to toe without posts.

2.2.3 Horizontal Frames

1 by 5/8 inch channels.

2.2.4 Center Reinforcing Bar

One 1 by 1/2 by 1/8 inch channel with all wires woven through, or two 1 by 3/8 by 1/8 inch channels bolted together with mesh in between.

Section 10 22 13 Page 3 PW\DEN001\669816 February 2019

2.2.5 Capping Bar

2-1/4 by one by 1/8 inch channel or 2 by 1/4 inch flat bar.

2.2.6 Corner Posts

Structural steel angles, 1-1/4 by 1-1/4 by 1/8 inch.

2.2.7 Line Posts

Unless otherwise indicated, provide partitions more than 12 feet high with flat bar line posts bolted between vertical frame channels. Sizes of posts must be as follows:

2.2.8 Hinged Doors

Frames must be 1-1/4 by 1/2 by 1/8 inch channels with 1-1/4 by 1/8 inch flat bar cover on top and bottom rails and on hinge stile and a 1-3/8 by 3/4 by 1/8 inch angle riveted to the lock stile. Provide 1 1/2 pairs of regular weight, wrought steel, non-removable pin, butt hinges riveted or welded to the door and the door opening frame for each door.

2.3 HEAVY DUTY PARTITIONS

2.3.1 Wire Mesh

6 gage wire, 2 inch mesh.

2.3.2 Panel Frames

1-1/2 by 3/4 by 1/8 inch steel channels.

2.3.3 Center Reinforcing Bar

One 1-1/2 by 3/4 by 1/8 inch channel with all wires woven through, or two 1- 1/4 by 3/8 by 1/8 inch channels bolted together with mesh in between.

2.3.4 Capping Bar

Structural steel channel, 3 inch by 4.1 pounds.

2.3.5 Corner Posts

Structural steel angles, 1-3/4 by 1-3/4 by 1/8 inch.

2.3.6 Line Posts

Unless otherwise indicated, provide partitions with flat bar line posts bolted between vertical frame channels. Sizes of posts must be as follows:

2.3.7 Hinged Doors

Frames must be 1-1/2 by 3/4 by 1/8 inch channels with 1-1/2 by 1/8 inch flat bar cover on top and bottom rails and on hinge stile and a 1-5/8 by 7/8 by

Section 10 22 13 Page 4 PW\DEN001\669816 February 2019

1/8 inch angle riveted to the lock stile. Provide 1-1/2 pairs of heavyweight, wrought steel, non-removable pin, butt hinges riveted or welded to the door and the door opening frame for each door.

2.5 DOOR OPENING FRAMES

Provide frames the same size and shape as the vertical frames for the mesh panels.

2.6 LOCKS

Provide each door with a mortise type lock with a six-pin tumbler lock cylinder on the outside and a recessed knob on the inside.

2.8 FABRICATION

2.8.1 Standard Panels

Wire must be woven into diamond mesh, intermediate crimped, and securely clinched to frames. Joints must be mortised and tenoned. Wire must be continuous at center reinforcing bars, either woven through a single channel or bolted between two channels. Panel vertical frames must have 1/4 inch bolt holes 12 inches o.c. for normal duty partitions.

2.8.3 Doors

Construction must be similar to that specified for panels. Wire mesh must be the same as that used in the adjacent partition panels.

2.8.4 Finish

Thoroughly clean ferrous metal, treat with phosphate, and paint with black enamel in the shop.

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Wire Mesh Partitions

Install plumb, level, and true to line, within a tolerance of 1/8 inch in 10 feet or the height or run of the partition, if less than 10 feet. Anchor floor sockets to the floor with expansion bolts. Bolt vertical frames and posts together with 1/4 inch bolts 12 inches o.c. for normal duty partitions. Secure top frames to a continuous capping bar with 1/4 inch diameter U bolts not more than 28 inches o.c.

3.1.2 Doors

Install in accordance with the manufacturers' recommendations. Adjust as required so that doors and hardware operate freely and properly.

3.1.4 Touch-Up

Clean and paint scratches, abrasions, and other damage to shop painted surfaces to match the shop-applied finish.

Section 10 22 13 Page 5 PW\DEN001\669816 February 2019

Repair minor surface rust areas. Clean and prime with rust inhibitive primer paint. Apply final paint to match shop-applied finishes.

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