FFP_Addendum_4.pdf

ADDENDUM NUMBER 4

TO

DRAWINGS AND SPECIFICATIONS

FOR

REPAIR FIRE CODE DEFICIENCIES

FACILITY 30013

WRIGHT-PATTERSON AIR FORCE BASE, OHIO

PROJECT NUMBER: ZHTV 090006

1. The contract Drawings and Specifications are hereby amended in part as follows:

A. On Drawing Sheet A001, add General Note H as follows:

H. Control joints and sealants:

Provide 4 hour fire rated CMU control joints per NCMATEK 10-2C, type

3d, formed paper (or other suitable bond breaker), (see http://01a768a.netsolhost.com/pdf/NCMATEK10-2C.pdf) at the following locations:

1. In line with changes in wall height (such as at abrupt changes in height along column line 24.3).

2. At changes in wall thickness (such as at both sides of all pilasters and above both sides of all pilasters on line 24.3).

3. At or near one jamb side of door openings less than 6 feet and at both sides of openings greater than 6 feet.

4. At wall intersections.

Stop horizontal reinforcement 2” either side of joint and bridge joint with

Smooth No. 2 dowel, one end debonded.

Rake joint each side and provide ASTM C 920, Type S or M, Grade NS, Class 12.5, Use NT sealant. Color to match surfaces being joined.

At other interior locations where sealant is required, including but not limited to small voids between walls or partitions and built-in or surface-mounted equipment, fixtures, and similar items; or the perimeter of frames at doors, windows, and access panels which abut other surfaces, provide

ASTM C 920, Type S or M, Grade NS, Use NT. Class 12.5 sealant (for interior applications) and Class 25 sealant (for exterior applications), complete with all primers, backers and accessory materials. All sealant materials shall be submitted for Government approval and application of such shall be in strict accordance with the manufacturers’ recommendations.

http://01a768a.netsolhost.com/pdf/NCMATEK10-2C.pdf

B. On Drawing Sheet A101, add Note A4-1 as follows:

A4-1. Refer to Sheet A001, General Note H, for control joint and sealant requirements.

C. On Drawing Sheet F002, add Note A4-2 as follows:

A4-2. Provide a 10” connection between the new underground exterior fire loop main piping and the new interior riser near the intersection of column lines Z and 37, near the northeast corner of the building.

Provide a valve close to the building exterior, similar to the others indicated. Provide a sectional shut off valve south of the connection to the underground loop main.

2. This Addendum Number 4 hereby forms and is made a part of the above named project drawings and specifications.

July 10, 2012