BID PACKAGE NO. 2 ADDENDUM NO. 4

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1 BID PACKAGE NO. 2 ADDENDUM NO. 4 Lory Student Center Revitalization CSU Project No.: Aller Lingle Massey Architects P.C. 712 Whalers Way, Suite B-100 Fort Collins, CO (970) March 4, 2013 To all proposed Bidders for the above-referenced project, the following changes are hereby made and will become a part of the Contract Documents: SPECIFICATIONS 1. Section Alternates; Include the following as Alternate #14, "As shown on A-201B Floor Finish Plan for RamTech included in this addendum 4 package, substitute WF-1, Solid Wood Plank flooring with Amtico Luxury Vinyl Plank flooring as shown. Color to be selected from full line Amtico Wood Collection, 6"x36" plank size." 2. Section Architectural Precast Concrete, Products; Add Precast Concrete Stair Treads/Risers as detailed on the Drawings. Treads to be formed with four rows of 1/8" wide x 1/4" deep (spaced 1/2" apart) strips full width of stairs for slip resistance. Provide cross channels through strip rows at 3'-0" o.c. for drainage. Color of treads/risers as noted on the Drawings. 2. Section Terrazzo, 2.2B.1, Reinforcing Membrane; Crack reduction membrane does not have to be installed over all existing and new concrete. Install reinforcing membrane only at cold joint conditions of SOG concrete and elevated concrete slabs with membrane lapping a minimum of 18" on each side of joint line. 3. Section Terrazzo; Precast terrazzo base to be coved (1/2" diameter) with a metal transition strip between precast pieces and poured in place flooring material. 4. Section Terrazzo, 2.2A.2; Thickness of poured epoxy terrazzo to be 3/8" thickness minimum. DRAWINGS 1. Sheet A-422 Exterior Stairs; Stairs 13 and 14 to be precast concrete per spec All exterior treads to cross slope 1/8" per foot for drainage. Form in four rows of 1/8" wide x 1/4" deep strips (Space apart by 1/2") full width of stair for slip resistance. 2. Revised sheets with revision clouds are as follows: COVER SHEET G-000 INDEX OF DRAWINGS A-600C LEVEL 100 UNIT C REFLECTED CEILING PLAN S-000 SHEET LIST S-201D LEVEL 200 UNIT D FRAMING PLAN S-304 GRADE BEAM ELEVATIONS S-471 STAIR SECTIONS S-488 SHEARWALL SECTIONS AND ELEVATIONS S-510 TYPICAL CONCRETE DETAILS M-200C LEVEL 100 UNIT C HVAC PLAN

2 RAMTECH DRAWINGS G-002 INDEX OF DRAWINGS, ARCH ABBREVIATIONS, SYMBOLS & GEN. NOTES AD-101 DEMOLITION PLAN A-201A FLOOR PLAN LEVEL 100 RAMTECH A-201B FINISH PLAN LEVEL 100 RAMTECH A-201C POWER & COMMUNICATIONS PLAN LEVEL 100 RAMTECH A-501 INTERIOR ELEVATIONS A-511 INTERIOR DETAILS A-512 INTERIOR DETAILS A-541 CUSTOM MILLWORK DETAILS DISPLAY TABLES A-542 CUSTOM MILLWORK DETAILS FEATURE TABLE A-601 REFLECTED CEILING PLAN LEVEL 100 RAMTECH A-801 SCHEDULES A-901 FURNITURE PLAN LEVEL 100 RAMTECH ATTACHMENTS 1. Design Team Responses to Questions J 2. Design Team Responses to Questions K 3. Design Team Responses to Questions L 4. All sheets noted above. END OF ADDENDUM Receipt of this addendum must be acknowledged with the bid.

3 CSU Lory Student Center Revitalization February 28, 2013 Bid Questions J on the BP # 2 CD Documents 03/04/13 - Design Team Responsess are shown in RED. 1. Addendum No. 2, Questions/Answers B Question 21. The answer does not address the site wall that is indicated on Sheet S-201D. The wall in question is depicted below. Addendum Answer states walls are shown on Sheet L2.07. There is no wall at this location on Sheet L2.07 (it is roughly 182 LF by 70 LF). There are planter walls on Sheet L2.07. Does this long wall even exist? If not, please remove from Sheet S-201D. Wall has been deleted on sheet S-201D 2. Specification Section Painting, Paragraph 2.02.E. Are KWAL, PPG, and ICI acceptable manufacturers? Yes, provided these paints are available through a Fort Collins-based retail store for ease of acquiring maintenance stock in the future. I was able to confirm Kwal and ICI stores in Fort Collins, but not PPG.

4 3. Sheet S-511, Detail 1. Shearwall Dowel Schedule. What is the length of the dowels? The embedment into the existing slab is 6 and the dowels appear to be 12 long. Please confirm. This was discussed on the conference call on Fri 3/1/2013. Dowels shall have 6 embedment per detail, and shall have full development into new concrete floor/shearwall (straight development or hooked end acceptable). 4. Sheet S-511, Detail 1. At all of the elevated slab openings for the shearwalls, what are the shoring/propping requirements of the existing slabs around those openings? For instance: a. Is the use of high early strength concrete for the shearwalls and opening infill allowed? In principle, yes, please submit proposed concrete mix for our review. i. Once a shearwall and its associated slab infill are at strength, can the shoring/propping at that level be removed? This depends on sequencing on the multi-level walls. Please submit proposed construction sequence and shoring/propping and de-propping sequence per the specifications for our review. b. Will it be allowable to pour one level of the shearwall and its associated slab opening at the same time? Or does the wall pour separately from the infill slab? In principle this is structurally acceptable. The construction documents require the same strength slab concrete as per the shearwalls, 5,000 psi at 28 days. *****End of Questions for February 28, 2013***** Respectfully submitted, Saunders Construction Inc. Kay Rasmussen Senior Preconstruction Manager

5 CSU Lory Student Center Revitalization March 1, 2013 Bid Questions K on the BP # 2 CD Documents 03/04/13 - Design Team Responses are shown in RED. 1. Specification Section Terrazzo, Paragraph 2.2A.2. indicates the nominal thickness as ½ when in fact it should read 3/8 for Epoxy Terrazzo. All poured terrazzo to be 3/8" thick. 2. Specification Section Terrazzo, Paragraph 2.2B.1. References a reinforcing membrane. Does a crack reduction membrane need to be under all terrazzo, at both existing concrete and new concrete? Crack reduction membrane to be applied over all cold joints of SOG concrete and elevated concrete slab conditions with 18" lap on each side of joint line. 3. Specification Section Terrazzo, Paragraph 2.3.A. Precast terrazzo base is listed as both epoxy and cementitious. Please confirm that the base should match the floor as epoxy terrazzo. Yes, terrazzo base should be of the same epoxy material as the poured conditions. 4. Specification Section Terrazzo, Paragraph 2.3.A.3. Indicates a metal toe strip at precast base locations. This usually occurs with a cove base or shoe. Do you want cove or top set straight base? Top set will be the best solution for installation and schedule. Provide precast terrazzo cove base for ease of cleaning as desired by CSU. 5. Sheet A-404, Detail 4 and Sheet S-456, Detail 3. Does the HSS steel for exterior framing need to be AESS. If yes, which level/type/finish of AESS per the matrix on Sheet S-100. Yes, provide A,D and E. 6. Sheet A-422. Shows the exterior west stair to receive stone treads and risers and indicates refer to Landscape Plan for Specifications. The landscape plans do not address this stair. Please provide a specification for these treads and risers. The stair shown on A-422 (Stair 14) has precast concrete treads and risers, not stone. The finish color of these treads and risers is to match the adjacent Mesa Buff finish indicated on the landscape drawings. Please provide color samples to the architect for approval. The finish treads and risers on stair 1/A-428 (Stair 13) are also precast concrete. The finish of these treads and risers is to match the adjacent Kahlua finish indicated on the landscape drawings. Please provide color samples to the architect for approval. See Spec Section Architectural Precast Concrete. 7. The following questions relate to Carbon Fiber Reinforcing: (please confirm responses to BP2 questions G have been reviewed): a. Sheets S-260B and S-510. Level 100. Column H/9 is indicated to be strengthened but it is not listed in the summary table on detail 1/S510. Confirm if strengthening of this column is required. Strengthening is required. a. Sheets S-260B, S-260C, S-260D, S-261C, S-510. Levels 100 and 200. Clarify if provided dead and live loads for column strengthening are service loads or factored loads. If factored loads, the capacity ratios for each column shown on detail 1/S510 do not correspond to the capacity ratios computed as the sum of the dead and load loads and the provided capacities (See table below). Which Pu values should be considered?

6 Delete capacity table on detail 1/S-510. Load table below (and loads on drawings S- 260C, S-260D and S-261C) will be revised shortly. Level Unit Drawing Location φpn_exs P DL P LL P U Cap. Ratio (kip) (kip) (kip) (kip) calc'd provided D G J C S-260C J K K D S-260D R R C S-261C K b. Sheet S-251D. Level 200. The existing wall at gridline 22r is to be partially demolished leaving 16 below the bottom of the slab. Verify if strengthening is required on one span or both spans (MM-N) and (N-PPr). Both spans, full length between MM and PPr. c. Various Strengthening Sheets. In some instances the notes for beams that require shear strengthening specify Vnew and in other cases Vsreq. Confirm that Vnew indicates the factored new shear demand (Vu), and Vsreq indicates the additional shear strength that is to be provided. Specify if otherwise. Correct, Vnew is factored new shear demand (Vu) and Vsreq is the additional factored shear strength to be provided. d. For flexural strengthening, confirm that Mallow corresponds to the existing moment capacity ( Mn existing) and Mreq corresponds to the new moment demand (Mu). Correct, Mallow is the existing moment capacity and Mreq is the new moment capacity required. e. Sheet S-252D. There are several locations (i.e.: S-252D K-M and ) where dimensions (length and width) for the FRP layout for slab strengthening are not indicated. Please confirm if the dimensions for FRP layout should be scaled from the drawings. Scale for bidding purposes only. Provide a specific RFI for construction shop drawing phase. f. Sheet S-252D. There are locations (i.e.: S-252D K-M and ) where the FRP layout is shaded for more than 2 bays, but the steel required is shown only on two bays. Please clarify if the indicated equivalent steel should be used for all bays, or details on S- 508 should be used for bays with no information? Equivalent steel shall be used for all bays. g. Sheet S-253C. Level 400. Flexural strengthening: Confirm if strengthening is also required in span C/15-C/16. Yes. Shear strengthening of beams between supports C/14 C/15 C/16 is not feasible with FRP as the strength increase required exceed the limits specified by ACI 440.2R guideline. Please clarify if strengthening using enlargement is acceptable and provide maximum enlargement below beam that would not interfere

7 with clearance below the beam. Strengthening using enlargement is structurally acceptable. Provide solution to within 12 of ceiling soffit below. h. Sheet S-253D. Level 400. Consider the following: Area A1 is located between gridlines (MM-PPr)/(21r-22) Area A2 is located between gridlines (MM-PPr)/(22-22r) Both areas are parts of the same slab. i. Existing concrete slab A1 is indicated to be upgraded to approximately double its existing capacity, while adjacent slab area A2 bending capacity is indicated to be increased by 14%. This is a significant difference on two parts of the same slab. Please verify if the specified strength increase is correct. Specified increase is correct to account for snow drift loads (it does not appear per 1966 archive drawings that snow drift was a design parameter at this roof). ii. For areas A1 and A2 indicate direction of required strengthening (one way or each way?) Provide strengthening in east-west direction for existing one-way spanning slabs that span this direction (refer to archive drawings). iii. Flexural strengthening of slab A1 is not feasible with FRP (ACI 440.2R limits exceeded). Are there any restrictions for installing a new CIP beam below or using steel plates? Provide a solution that works within 10 of existing slab soffit. i. Sheets S-303, S-409, S-508. Level 100. Notes for FRP strengthening of openings on basement walls reference detail 5/S-508, which indicates to provide FRP equivalent to #5 4 O. C. (each direction) and on one wall face only. Please clarify the following: i. Is the FRP reinforcement intended to provide shear or flexural strengthening (design criteria is different)? Shear primarily at short openings (short equals less than 2 ft), flexural primarily at longer openings. ii. Layout of FRP strips should be in accordance with detail 5/S-508 or should it follow the layouts indicated on Sheets S-303 and S-409? Follow specific S-303 and S-409 sheets. 5/S-508 is typical (and will be used at smaller MEP openings in existing walls). iii. Length of vertical FRP at multiple locations cannot be achieved per detail 5/S Confirm that it is acceptable to terminate the FRP at slab soffit (top end of strip) and at the top of the slab on grade (bottom end of FRP strip)? This is structurally acceptable. j. Sheet S-409. Level 100. Section 3 (gridline 9) Indicates 2 horizontal plies of FRP reinforcement above the opening. Clarify type of FRP and if these strips are in addition to typical FRP reinforcement for openings. Delete 2 layers of FRP note, use typical 5/S- 508 detail. k. Sheet S-508. Details 3 and 4 indicate FRP on both directions, total FRP coverage area shall be 60% of overall area shown, is that for each direction or the summation of both directions shall be 60% (30% in each direction)? 60% in each direction.

8 l. Sheet S-508. Please provide sample locations where Details 1 to 4 for FRP layout should be used. Specific dimensioned layout is given on S-250 and S-260 series drawings in BP2 and BP2 addendum 1, 2 and 3 drawings. 8. Sheet S-600. Does the HSS steel for the glass fin supports need to be AESS. If yes, which level/type/finish of AESS per the matrix on Sheet S-100. AESS is not required and is not requested in any notes on S-600 *****End of Questions for March 1, 2013***** Respectfully submitted, Saunders Construction Inc. Kay Rasmussen Senior Preconstruction Manager

9 CSU Lory Student Center Revitalization March 2, 2013 Bid Questions L on the BP # 2 CD Documents 03/04/13 - Design Team Responses are shown in RED. 1. Specification Acoustical Ceilings. Paragraph 2.02.A.5. indicates a reveal angle wall molding to match balance of system. There is a reveal wall angle on APC-1, 2, 3, 4 and 6. Please confirm typical wall angle item #7800 (7/8 x7/8 ) is acceptable and not a shadow mold, unless otherwise noted. No, it should be a shadow mold, like #7871 (3/4 x 15/16 ) 2. Sheet A-200C at gridline B/22.5: MEP Shops 146 shows no furred wall against the foundation wall; however, Section 1/A-402 shows a wall. Please clarify. This wall will not be furred. 3. Sheet A-200C at gridline A/22: Please clarify partition type for this shaft. This is partition type 8. See revised A-200C for location. 4. Sheet A-200D at gridline U/19.5: Should Durock Cement board be installed behind the new wall tiles (GWT-2) proposed on the west wall of Microbrewery 153? Yes, cement board is required behind all wall tile conditions. Our presumption is that the concrete wall will be too irregular to apply wall tile directly to it. 5. Sheet A-200D. There are ramps and stairs at roughly Column Grid L between Grids 17.2 and These are not indicated on the Structural drawings. Please provide dimensions, slab depths, and reinforcing requirements for the ramps and stairs. See sheets A-544 and A-711 for dimensional information. Rebar for stairs and ramp shall be per 7/S Sheet A-600 RCP symbol legend and Specification Section Acoustical Ceilings: APC-4 calls for a 2 x2 x5/8 Ceramaguard Unperforated tile by Armstrong. Please note, if a 2 x2 system is required, the tile will be Perforated (item Ceramaguard Fine Fissured #607). Ceramaguard unperforated tile comes in only 2 x4 x5/8 item #605. Please clarify. Perforated is acceptable. 7. Acoustical ceiling tile APC-6 is not found. The Specification Section notes this to be installed in AV Control rooms with black exposed grid. Please clarify if this is to be installed in AV room 350H on Sheet A-602D rather than the noted APC-2 on Sheet A-602C. Yes, AV room 305H should have APC Detail 16/A-606 notes a ½ x 5/8 painted reveal. This detail occurs several places and only around ceiling type APC-1. Please confirm item #7873 with a 3/8 reveal is acceptable and this reveal molding should be typical for all APC-1 ceilings. Use #7875, ½ 9. Sheet FS202: The building conditions and notes #10.A call for heavy gauge metal studs in all food service area walls. Please specify a stud gauge. 18 ga. unless otherwise noted for heavier gauge at specific locations such as where stone veneer is located. 10. Please provide Food Service drawings for Retail 252A, 253, 254, and 256 as none are located. We do not have finalized information for these food venues at this time. Several will be designed separately by outside vendor's design team once final selection of vendors is made by CSU. *****End of Questions for March 2, 2013***** Respectfully submitted, Saunders Construction Inc.

10 Kay Rasmussen Senior Preconstruction Manager