UCB 3 rd & 4 th Floor HVAC Upgrade Solicitation #1549 Invitation to Bid (ITB) for General Contractor Services. ADDENDUM #1 March 9, 2015

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1 UCB 3 rd & 4 th Floor HVAC Upgrade Solicitation #1549 Invitation to Bid (ITB) for General Contractor Services ADDENDUM #1 March 9, 2015 This Addendum is issued to provide answers to questions from potential bidders and to inform you of the following revisions to the above-referenced ITB and the Contract Documents for the Project. Where this Addendum is inconsistent with the ITB or any previous addenda, this Addendum shall control. Bids shall conform to this Addendum. Unless specifically changed by this Addendum, all other requirements, terms and conditions of the ITB, and any previous addenda, remain unchanged and can be modified only in writing by PSU. A. SCHEDULE REMINDER: 1. 2 nd Walk Through tomorrow, March 10 th at 11:00 AM Meet in USB Room 302T 2. Questions, solicitation protests and substitution request due Friday, March 13 th by 5:00 PM 3. Bids due and Public Bid Opening will be held on Thursday, March 19 th at 2:00 PM in USB Room 302T B. SPECIFICATIONS: In addition to the 1-hour ceiling tiles that are specified in the ITB we also need to provide a 1-hour fire rated supply and return diffuser assembly. In lieu of what is currently specified see attached. C. ATTACHMENTS: 1. Sign in Sheet 2. 3 rd and 4 th floor pictures above drop ceiling 3. Fire Rated Diffuser (Supply and Return) Cut Sheet 4. Fire Rated Diffuser (Supply and Return) Specification D. CLARIFICATIONS: 1. The vast majority of the drop ceiling does not contain insulation above it there are some areas in which the insulation from the structure above has fallen. See attached pictures. Page 1 of 9

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4 3 rd & 4 th Floor Pictures Above Drop Ceiling 3 rd Floor 4 th Floor Page 4 of 9

5 Fire Rated Diffuser (Supply and Return) Cut Sheet Page 5 of 9

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9 Suggested Division 15 Specification Perforated Ceiling Diffusers Steel Model: PAS - Supply, Flush Face Fire Rated Diffuser (Supply and Return) Specification Perforated ceiling diffusers shall be TITUS models PAS (steel, flush face) for supply. The return models shall have the same face and border construction as the supply models for harmonious appearance in the room. Diffusers shall have a perforated face with 3/16-inch diameter holes on ¼-inch staggered centers and no less than 51 percent free area. Perforated face shall be steel. The backpan shall be one piece stamped heavy gauge steel of the sizes and mounting types shown on the plans and outlet schedule. The diffuser neck shall have 1 1/8-inch depth for easy duct connection. Diffusers must discharge a uniform horizontal blanket of air into the room and protect ceiling against smudging. Pattern controllers in the supply models shall be mounted on the back of the perforated face and must be field adjustable to allow the discharged air to enter the room in either vertical or one-, two-, three- or four-way horizontal jets. The perforated face must be easily unlatchable from the backpan to facilitate option of the face for pattern controller adjustment or to access an optional damper. The finish shall be #26 white. The finish shall be an anodic acrylic paint, baked at 315 F for 30 minutes. The pencil hardness must be HB to H. The paint must pass a 100-hour ASTM B117 Corrosive Environments Salt Spray Test without creepage, blistering or deterioration of film. The paint must pass a 250-hour ASTM D870 Water Immersion Test. The paint must also pass the ASTM D2794 Reverse Impact Cracking Test with a 50-inch pound force applied. Optional damper shall be constructed of heavy gauge steel. Damper must be operable from the face of the diffuser by unlatching the diffuser face. The diffuser must be designed such that complete removal of the face is not required during damper adjustment. The manufacturer shall provide published performance data for the perforated diffuser. The diffuser shall be tested in accordance with ANSI/ASHRAE Standard questions regarding this procurement to: proposals@pdx.edu END OF ADDENDUM #1 Page 9 of 9