ARCHITECTURE
URBAN DESIGN
INTERIOR DESIGN
PROJECT NAME:
CITY ATTORNEY’S OFFICE RENOVATION ADDENDUM
ADDENDUM #:
01 PROJECT #:
114280.00 TO:
PATRICK RILEY, PROJECT MANAGER DENVER PUBLIC WORKS, CITY AND COUNTY OF DENVER DATE OF ISSUANCE:
12‐3‐14 FILE #:
ADDENDUM 01 This addendum forms a part of the Contract Documents and modifies original Project Manual and Drawings dated 11-24-14, as noted
below. Each bidder shall be responsible for reading the items in this Addendum in order to determine to what extent work is affected.
General Contractor shall be responsible for advising all subcontractors and material suppliers of this Addendum. The successful bidder
shall execute each item, herein listed, in complete conformance with all applicable sections of Drawings and Project Manual.
DRAWING REVISIONS G‐000: ADDITION OF PROJECT DESCRIPTION IN CODE NARRATIVE ADDITION OF TENANT INFORMATION ADDITION OF GENERAL NOTES A‐101: DIMENSION CLARIFICATIONS TYPICAL DETAIL TAG AT WALL TO MULLION A‐102: CHANGE TO ACOUSTICAL WALL TYPES IN 1217 AND 1216 DIMENSION CHANGES TYPICAL DETAIL TAG AT WALL TO MULLION A‐140: ADDITION OF SHEET SPECIFICATIONS A‐551: ADDITION OF WALL TO MULLION DETAIL ADDED NOTE TO ELEVATION 1/A‐551 A‐601: ADDED NOTES TO DOOR AND FRAME TYPES DETAIL NUMBERS CHANGES ON HOLLOW METAL FRAMES GLAZING TYPE CHANGE AT SIDELIGHT ADDED HARDWARE NOTES ADDED DOOR STOPS AND CLOSER AT CONF ROOM. REVISIONS TO WINDOW SCHEDULE ADDED SECTION DETAIL TAG FOR TRANSACTION WINDOW DELETED TYPE G2 GLAZING A‐611: RENAMED HOLLOW METAL HEAD AND JAMB DETAILS (PREVIOUSLY HAD THEM SWITCHED) REVISED NOTE ON CLERESTORY HEAD AND JAMB DETAILS TO CALL OUT GLASS ADDED TRANSACTION WINDOW DETAIL SEE ALSO ATTACHED ADDENDUM NARRATIVE FROM SWANSON RINK FOR DESCRIPTION OF MECHANICAL , ELECTRICAL , AND FIRE PROTECTION REVISIONS. END OF ADDENDUM #01 12/2/2014 Page 1 of 1 P:\2014\114280.00 City of Denver – City Attorneys Office\_Published\Document Sets\CONSTRUCTION DOCUMENTS 12‐2‐14\ADDENDUM 01.docx DENVER
BOULDER
COLORADO SPRINGS
DENVER
PHONE: 303.861.5704
3003 LARIMER STREET
FAX: 303.861.9230
DENVER, COLORADO 80205
WWW.OZARCH.COM
December 2, 2014
OZ ARCHITECT
ATTN: Robert Willsie; Shelly Cockrell
3003 Larimer Street
Denver, CO 80205
rwillsie@ozarch.com; scockrell@ozarch.com
Reference:
CITY AND COUNTY OF DEN CITY ATTORNEY'S OFFICE TI
Addendum No. 01 to Bid Issue Documents Issued December 2, 2014
Dear Robert & Shelly:
Attached is Addendum No. 01, dated December 2, 2104. Please copy and distribute as deemed necessary.
Be sure to acknowledge receipt of Addendum No. 01 in your bid proposal.
Sincerely,
SWANSON RINK, INC.
Michele Hendrick
Project Manager
Attachments:
Addendum No. 01 narrative.
Drawings: E-000, ED-103, E-301, E-401, E-402, E-111, FA-000, FA-002, FAD-101, FAD-102,
FA-301, FA-302, FP-301. FP-302, issued as Addendum No. 01, dated December 2, 2014.
ADDENDUM NO. 01
City and County of Den City Attorney's Office TI
December 2, 2014
Page 3 of 3
ADDENDUM NO. 01
CITY AND COUNTY OF DEN CITY ATTORNEY'S OFFICE TI
Swanson Rink Project Number: 14-901.11
ADDENDUM ISSUE DATE: December 2, 2014
This addendum is part of the Contract Documents and contains additions, deletions, changes and
clarifications to the original Bidding Documents dated November 24, 2014. These items shall be
included in the work and bids shall be submitted accordingly. Bidders shall acknowledge receipt of this
addendum in their bid proposal.
DRAWINGS:
Electrical
Sheet E-000
1. REVISED drawing list.
Sheet ED-103
1. DELETED light switch in Files 12.A.5.
Sheet E-301
1. ADJUSTED locations of light fixtures in Storage 11.B.3 and Wellness 1108 to align with ceiling grid.
Sheet E-401
1. ADDED a second duplex receptacle in Wellness 1108 for under counter refrigerator and revised
circuiting so the refrigerator is on its own circuit.
2. ADDED keyed note 1.
3. REVISED sheet name.
Sheet E-402
1. REVISED sheet name.
Sheet E-111
1. REVISED panel schedules as indicated.
Fire Alarm
Sheet FA-000
ADDENDUM NO. 01
City and County of Den City Attorney's Office TI
December 2, 2014
Page 2 of 3
1. REVISED fire alarm drawing list.
Sheet FA-002
1. REVISED fire alarm specifications as indicated; some bullets were taken out and/or modified.
Sheet FAD-101
1. REVISED general note 1.
2. ADDED general note 3.
3. REVISED keyed note 1
4. REVISED sheet name.
Sheet FAD-102
1. REVISED general note 1.
2. ADDED general note 3.
3. REVISED keyed note 1
4. REVISED sheet name.
5. DELETED fire alarm horn/strobe in Files 12.F.20.
Sheet FA-301
1. REVISED general note 2.
2. REVISED keyed note 1.
3. REVISED sheet name.
4. ADDED candela rating to fire alarm devices.
Sheet FA-302
1. REVISED general note 2.
2. REVISED keyed note 1.
3. REVISED sheet name.
4. ADDED horn/strobe in Open Office 1209.
5. ADDED candela rating to fire alarm devices.
Fire Protection
Sheet FP-301
1. MODIFY existing sprinkler head in open office area.
2. MODIFY new sprinkler head location in WELLNESS 1108 and WAR ROOM 1109.
Sheet FP-302
ADDENDUM NO. 01
City and County of Den City Attorney's Office TI
December 2, 2014
Page 3 of 3
1. MODIFY new sprinkler head locations in OFFICE 1205, WAR ROOM 1202, FILES 1203, FILES
1210, and STORAGE 1217.
2. MODIFY existing sprinkler head location in FILES 1203.
END OF ADDENDUM OF NO. 01
MWH/bla
City & County of Denver
Attorney’s Office TI
Webb Building
201 W. Colfax Ave.
Denver, CO 80202
Design Criteria
Current Issue Date: December 2, 2014
TAKING RESPONSIBILITY
City & County of Denver
Attorney’s Office TI
Design Criteria
Table of Contents
PROJECT OVERVIEW ................................................................................................... 1
MECHANICAL SYSTEM ................................................................................................ 2
ELECTRICAL SYSTEM .................................................................................................. 2
LOW VOLTAGE ELECTRICAL SYSTEM ...................................................................... 3
City & County of Denver
Attorney’s Office TI
TOC
Design Criteria
December 2, 2014
PROJECT OVERVIEW
Project Objective
The project consists of tenant improvements for 6,500 gross square feet of office space, located in the
Wellington Webb Building in Denver, Colorado. The space consists primarily of modifying open office
space to private offices. There are also open meeting spaces, several conference rooms, two war rooms
and some modified storage space. This project will not seek LEED accreditation.
11th Floor:
Adding six private offices, a war room, and a wellness room.
 Potential fire sprinkler head relocations and additions.
 Diffuser, register and grille relocation.
 Potential new VAV terminal unit for Wellness room and private offices.
 Revised lighting from open office suspended indirect to lay-in direct/indirect fixtures.
 Revised lighting control.
 Revised fire alarm system devices.
 Relocate ceiling mounted WAP units as necessary.
12th Floor:
Adding five private offices, a war room, two large conference rooms, a medium conference room, a small
conference room, and conversion of some file storage to open office space.
 Potential fire sprinkler head relocations and additions.
 Diffuser, register and grille relocation.
 Potential new VAV terminal unit for Wellness room and private offices.
 Addition of new VAV terminal units for the two large conference rooms.
 Revised lighting from open office suspended indirect to lay-in direct/indirect fixtures.
 Revised lighting control.
 Revised fire alarm system devices.
 Relocate ceiling mounted WAP unit as necessary.
Referenced Documents
Identify the regulatory and building codes and standards that are applicable to the project.
2009 International Building Code
2009 International Fire Code
2009 International Plumbing Code
2009 International Fuel Gas Code
2009 International Electrical Code
2011 Denver Amendments
City & County of Denver
Attorney’s Office TI
1
Design Criteria
December 2, 2014
MECHANICAL SYSTEM
Owner’s Mechanical Design Criteria
Criteria
Site Elevation
Design summer dry bulb/ wet bulb
temperature
Design winter dry bulb
Office Area Temperature
Office Acoustical Level
Value
5,280 Feet
Source
RFP
105Fdb/60 Fwb
ASHRAE
-10 Fdb
72° F +/- 3°F
NC 40
ASHRAE
Swanson Rink Assumption
ASHRAE
Mechanical Design Assumptions
NC values will be per ASHRAE recommendations.
Criteria
Wall R Value
Interior Lighting Load
Office Electrical Equipment
Value
13
1 w/ square foot
1.25 w/ square foot
Source
IEEC 2009
Swanson Rink
Swanson Rink
Mechanical Systems Descriptions
The 11th and 12th floors are served by a variable air volume distribution system. The exterior is
conditioned by fan powered boxes, and the interior areas are conditioned with VAV boxes.
New VAV terminal units will be installed to serve each of the new large conference rooms on the 12 th
floor, and to serve the new war room on the 11th floor.
Existing diffusers will be relocated to fit new floor plans. Existing diffusers and terminal units will be
rebalanced as needed. New diffusers will be installed as needed to fit new floor plans.
An existing return air plenum exists above the ceiling. New walls will extend to the bottom of the ceiling,
and will not protrude into the existing return air plenum.
Fire Protection Systems
All areas on the 11th and 12th floor are served by an existing wet pipe fire protection system. The existing
fire protection system will be modified as needed to provide adequate coverage for the new office plan.
Existing sprinkler head drops will be relocated, and new pendant sprinkler heads will be installed.
ELECTRICAL SYSTEM
Existing Systems
There are two existing Xcel Energy transformers, each one labeled as “PSCO Transformer Vault”,
serving power to the building. The first transformer vault is serving Office Tower No. 1 through a
3,000A, 480V, 3-phase main distribution switchboard “MDC1”. Switchboard “MDC1” serves Bus Riser
“A” which is used to feed low voltage panels and some high voltage panels. The second transformer vault
is used to serve Office Tower No. 2 through a 4,000A, 480V, 3-phase main distribution switchboard
City & County of Denver
Attorney’s Office TI
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Design Criteria
December 2, 2014
“MDC2”. Switchboard “MDC2” is used to serve Bus Riser “C” which serves the east side of the building;
sections “B” and “C”.
Demolition
Demolition will consist of the removal of the following items from the eleventh and twelfth floors of the
existing Wellington Webb building:

Existing lighting fixtures and exit fixtures in open and private offices and corridors. All existing
exit fixtures will be reused in new construction.

All conduit and wire serving lighting fixtures, floor boxes, and receptacles back to their
respective panels, switchgear, etc.
Utility Service
There are two existing Xcel Energy transformers serving the building. The first transformer is a 750kVA,
480V, 3-phase. The second transformer is a 1000kVA, 120/208V, 3-phase. Transformer sizes were
determined based on the sizes of the distribution switchboards they are feeding.
Lighting Systems
Lighting levels for each space will be designed to conform to the Illuminance Selection Tables appearing
in the latest edition of the Illuminating Engineering Society (IES) Lighting Handbook. New private
offices and war room will be illuminated using 2'x2' recessed direct/indirect fluorescent light fixtures with
T5 lamps. Corridors will be illuminated using 2’x 2’ recessed light fixtures to match existing recessed
2’X2’ light fixtures in Manufacturer, type, and lamp color used on each floor. The larger two new
conference rooms on the twelfth floor will be illuminated using some of the relocated 12-foot pendant
light fixtures. Some of the removed 8-foot pendants will be reused in the open office areas to maintain the
necessary lighting level.
The existing lighting control system will be used to control the light fixtures in the open office areas to
follow the existing switching system. In the new offices, conference rooms, storage rooms, and wellness
room, lighting shall be controlled locally through wall mounted dual-technology (passive
infrared/motion) occupancy sensors. Corridors and open office areas shall be controlled through the
existing lighting control panels. These previous lighting control design standards will be implemented for
the new offices and other build-out areas on the eleventh and twelfth floors.
General Power Systems
Provide power to new offices, one quad for computer equipment and other duplex receptacles for
convenience. In the two larger conference rooms, there will be floor boxes, convenience receptacles, and
receptacles for TV monitors at the appropriate height.
LOW VOLTAGE ELECTRICAL SYSTEM
Fire Alarm and Detection Systems
New wall mount strobes shall be added and integrated into the existing fire alarm system in all conference
rooms. Demolished horn/strobe devices shall be reused and integrated into the existing fire alarm system.
All new back boxes and wire will need to be added. The new fire alarm wire shall match existing plenum
rated fire alarm notification wire. The relocated wall mount horn/strobe and new strobe shall match
existing building fire alarm notification devices no exceptions. A new power supply maybe added
depending on the new battery calculations and if the existing system has enough circuit power to power
up the new notification devices.
City & County of Denver
Attorney’s Office TI
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Design Criteria
December 2, 2014
Access Control/Intrusion Detection Systems
Access control, card readers have been added to (3) door locations, Contractor to reference City and
County of Denver Low Voltage Communications Guidelines. Contractor shall be responsible for
integrating into existing access control system, including all licensing, programming and integration.
Closed Circuit Television System
N/A.
Cable Television System
New wall mounted outlet locations have been shown in new conference rooms. Contractor to reference
electrical and confirm mounting heights. Additional cabling for display and connectivity is noted on
plans. Contractor to reference City and County of Denver Low Voltage Communications Guidelines.
Telecommunication Systems, Cabling, and Pathways
New wall mounted outlet locations have been shown in new office spaces. Additional floor feed locations
shall re-use existing removed cables as well as adding new to supplement requirements. Contractor to
reference City and County of Denver Low Voltage Communications Guidelines.
Audio/Visual Systems
N/A.
Sound/Paging Systems
N/A.
City & County of Denver
Attorney’s Office TI
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Design Criteria
December 2, 2014