G Squared Design Addendum Specifications.pdf
PDF 102 KB Posted
- Attached to
- OAAA, 2010, 082525 JFHQ CONTROLLED AREA REMODEL
- Solicitation number
- IFB1 OAAA 2027000001 3
- Issued by
- Arapahoe County, Colorado
About this file
This is an Architect's Supplemental Instruction (ASI) addendum issued by G Squared Design on July 22, 2026, for the National Guard Secure Area project (Project Number 2026.060), a Secure Compartmented Information Facility (SCIF) compliance upgrade at the National Guard Joint Force Headquarters (JFHQ). The addendum provides clarifications and supplemental instructions to construction documents dated July 14, 2026, and updates the drawing set to reflect official state review findings and permit clarifications. The work encompasses demolition, wall framing, ceiling installation, mechanical and electrical coordination, security shielding systems, and vapor barrier installation across Level 2 of the facility. Key specifications include the replacement of sheet metal or metal vapor barriers with AL 40 material throughout walls and ceilings, modifications to wall-mounted item removal and reinstallation protocols, corrections to partition wall head conditions, updates to finish schedules with manufacturers and color numbers, and detailed security grounding requirements. The addendum modifies numerous flag notes and general notes across multiple drawing sheets, including demolition plans, floor plans, reflected ceiling plans, security plans, and partition type details to ensure compliance with controlled space requirements and SCIF security standards.
The addendum explicitly states that proceeding with work constitutes the contractor's acceptance of the information with no change to the contract sum or contract time. Notable specifications include the installation of visitor warning light systems and doorbell systems throughout secure spaces, comprehensive RF (radiofrequency) attenuation material grounding points spaced every 10 feet using 6 AWG minimum grounding wire configured in a "halo" formation, and vapor barrier seam treatment with 2 inches of 3M 1170 conductive adhesive tape or equivalent product. Security grounding must be maintained independently and separate from electrical grounding systems, with ground connections located a minimum of 1 meter away from electrical systems and routed to earth ground. The addendum references that antenna testing and bluelight system installation are by others and includes attachments of the full architectural drawing set for project 2026.060.
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Text version
G SQUARED DESIGN
ADDENDUM
10920 W Alameda Ave, Suite 100 720.502.4156 LAKEWOOD, COLORADO 80226
PROJECT: National Guard Secure Area PROJECT NUMBER: 2026.060
OWNER:
National Guard
ADD NUMBER:
TO:
Joe Levi at Oz Arch
DATE OF ISSUANCE:
07/22/2026
FROM: G SQUARED DESIGN
10920 W Alameda Ave, Suite 100
LAKEWOOD CO, 80226
COPIES TO:
☒ OWNER ☐ CONTRACTOR
☒ ARCHITECT ☐ FIELD
☐ CONSULTANT ☐ OTHER
The following clarifications or supplemental instructions to the construction documents dated (JULY, 14, 2026) previously issued and approved shall be considered as part of the original scope of the contract documents.
Proceeding with the work indicates the contractor’s acceptance of this information and acknowledgement that there will be no change to the contract sum or contract time.
ASI DESCRIPTION: The purpose of this addendum is to inform bidders of the updates to the drawings that have come from official review from the state, and clarifications from the original permit set that needed to be addressed.
General notes:
Anywhere Sheet metal or metal at the vapor barrier in the walls and ceilings was called out, AL 40 is now to be used.
Sheet AD-101 Demolition Floor Plan – Level 2: Flagnote 5 was modified to read as follows: “ALL WALL-MOUNTED
ITEMS SUCH AS, BUT NOT LIMITED TO, WHITEBOARDS, PICTURES, PLAQUES, TVS, ETC TO BE REMOVED AND
REINSTALLED BY OWNER. “
Sheet AD-111 Demolition RCP: General note 16 was added to read as follows: “REMOVE ALL STRAPS, HANGARS
AND SUPPORTS FROM CONTROLLED SPACE AREA (3-238)”
Sheet AD-111 Demolition RCP:
ADD Flag note #11 add to read as follows: PIPING TO REMAIN AND BE RE ROUTED OUT OF WORK AREA. RE:
PLUMB.
ADD Flag note #12 add to read as follows: REMOVE AND REINSTALL EXIT SIGNS
Sheet A-101 Floor Plans – Level 2: Drawing 3 was renumbered to drawing 1 and drawing 1 was renumbered to drawing 2.
Sheet A-101 Floor Plans – Level 2: Drawing 1 – Flagnote 1 was modified to read “STUDS FOR WALL FRAMING TO
GO TO DECK IN WALL WITH BOUNDARY DOOR. 16-gauge MIN”
Sheet A-101 Floor Plans – Level 2: Drawing 1 – Flagnote 5 was added – “REINSTALL WALL TO MATCH EXISTING”
Sheet A-101 Floor Plans – Level 2: Drawing 1 – Flagnote 6 was added – “FURRING WALL TO BE REINSTALLED TO
EXTENTS OF REMOVED FURRING WALL.”
Sheet A-101 Floor Plans – Level 2: Drawing 1 – wall type head conditions were corrected to new head typ descriptions on partition sheets.
Sheet A-101 Floor Plans – Level 2: Drawing 2 - Flagnote 10 was modified to read. “JUNCTION BOXES FOR FIRE
ALARM, IDS AND ACCESS CONTROL PANELS. RE: ELEC, MOUNT TO FIRE-RATED PLYWOOD. PAINT PLYWOOD TO
MATCH WALL; DO NOT PAINT OVER RATING LABELS.”
Sheet A-101 Floor Plans – Level 2: Drawing 2 Flagnote 13 was modified to read “IF ALT 1 FURRING WALL IS NOT
INSTALLED, DATA SHALL BE SURFACE MOUNTED TO BOUNDARY WALL AT THIS LOCATION.”
Sheet A-102 Finish Plan – Level 2: The finish schedule was updated with manufacturers and color numbers.
Sheet A-110 Reflected Ceiling Plan: General notes were updated as follows:
1. ALL REFLECTED CEILING PLAN DIMENSIONS AND HEIGHTS ARE FROM FINISH FACE TO FINISH
FACE.
2. ALL CEILING GRIDS ARE CENTERED ON ROOM OR CORRIDOR UNO.
3. ALL FIXTURES SHOWN AT CEILING GRID TO BE CENTERED IN BOTH DIRECTIONS WITHIN THE 2'x2' portion of the ceiling TILE. CENTER ALL CEILING MOUNTED ITEMS WITHIN CEILING ELEMENTS, IN
GYPSUM BOARD SOFFITS AND BETWEEN OTHER CEILING MOUNTED FIXTURES.
4. COORDINATE ACCESS PANEL LOCATIONS WITH LOCATIONS OF OTHER CEILING MOUNTED ITEMS.
5. ALL SUSPENDED ACOUSTICAL CEILING TILE TO MATCH EXISTING UNO.
6. INSTALL CEILING DEVICES AS INDICATED ON PLANS, NOTIFY ARCHITECT OF ANY DISCREPANCIES.
7. AT RATED CEILING AT THE BOTTOM OF FLOOR ABOVE, PATCH AND REPAIR ANY PENETRATIONS, HOLES OR DAMAGED GYP TO MAINTAIN BARRIER.
Sheet A-110 Reflected Ceiling Plan: – Flagnote 2 was modified to read, “(N) GYP BOUNDARY AT BOTTOM OF
STRUCTURE. SEE PARTITION DETAILS FOR FOILING.”
Sheet A-110 Reflected Ceiling Plan: – Flagnote 13 was added – “LINE OF JOIST ABOVE RATED GYP LAYER. VERIFY
LOCATION IN FIELD AS NEEDED, SHOWN FOR REF ONLY. TYP”
Sheet A-110 Reflected Ceiling Plan: – Flagnote 14 was added – “PROVIDE WAVEGUIDES IN DUCTWORK PER
MANUFACTURER, INSPECTION PORT AS PROVIDED BY ATTENUATOR MANUFACTURER.”
Sheet A-110 Reflected Ceiling Plan: – Flagnote 15 was added – “PROVIDE WAVEGUIDES IN DUCTWORK PER
MANUFACTURER, INSPECTION PORT AS PROVIDED BY ATTENUATION DUCT MANUFACTURER.”
Sheet A-110 Reflected Ceiling Plan: – Flagnote 16 was added – “REINSTALL EXIT SIGNAGE”
Sheet A-110 Reflected Ceiling Plan: Ceiling schedule was updated
Sheet A-161 Security Plan – The legends were updated to add descriptions for locations of aluminum sheet flooring, ceiling and grounding halo locations.
Sheet A-161 Security Plan – The following General notes were updated below:
8. ALL FLOOR PENETRATIONS TO BE TAPED WITH 2" BARRIER TAPE AND GROUNDED TO FLOOR
SHEETING
9. ALL ROOF/CEILING PENETRATIONS TO BE TAPED WITH 2" BARRIER TAPE TO 6" FROM
PENETRATION AND GROUNDED TO ROOF DECKING OR HALO SYSTEM
15. ALL SECURE SPACES MUST HAVE A VISITOR WARNING LIGHT SYSTEM AND DOORBELL SYSTEM
INSTALLED THROUGHOUT THE SPACE
16. EACH SECURE BOUNDARY WALL TO HAVE A SINGLE GROUND WIRE THAT ROUTES TO THE
PRIMARY SECURITY GROUND BAR FOR THE SECURE AREA. ALL SHIELDING SHALL BE GROUNDED
TO A NON-ELECTRIC, INDEPENDENT SECURITY GROUND LOCATED 1 METER MIN. WAY FROM ANY
ELECTRICAL GROUNDING SYSTEM. ALL RF ATTENUATING MATERIALS TO HAVE GROUNDING
POINTS EVERY 10 FEET AND LOCATED ABOVE CEILING TILES. GROUNDING WIRE TO BE 6 AWG
MIN. ALL SECURITY GROUNDING TO GO TO EARTH GROUND. GROUND WIRE TO BE CONFIGURED
AS A "HALO" COMPRISED OF TWO OPEN-ENDED "C" SHAPES IN EACH SPACE.
17. GROUNDING TO BE MAINTAINED TO GROUNDING SYSTEMS LOCATED ON THE INTERIOR OF THE
SECURE AREA. SECURITY GROUND TO GO TO EARTH
18. VERIFY ADHESIVE FOR VAPOR BARRIER IS CLEANED OFF OF ALL METAL SURFACES AT
CONTINUOUS BARRIER TO ENSURE CONTINUITY.
19. PROVIDE 1" OVERLAP OF NON-CONDUCTIVE TAPE AT ALUMINUM SHEATHING SEAMS.
20. VAPOR BARRIER TO RECEIVE 2" OF 3M 1170 CONDUCTIVE ADHESIVE TAPE OR EQUAL PRODUCT
ON ALL SEAMS.
21. BLUELIGHT SYSTEM BY OTHERS
22. ANTENNA TESTING BY OTHERS
23. ALL BLACK GROUNDING TO BE SEPARATE FROM RED GROUNDING
Sheet A-590 – vapor barrier details – DRAWING 5&7 – VESTIBULE WALL DETAIL AND JAMB DETAIL AT DOOR.
Sheet A-590 – vapor barrier details – DRAWING 6 – SHEET CEILING DETAIL WAS ADDED.
Sheet A-591 – vapor barrier penetration details – DRAWING 4 WAS CORRECTED. PLEASE REVIEW NEW DETAIL.
Sheet A-591 – vapor barrier penetration details – DRAWING 5 HAD THE VAPOR BARRIER RELOCATED TO THE
CORRECT LOCATION
Sheet A-591 – vapor barrier penetration details – DRAWING 6 HAD THE VAPOR BARRIER RELOCATED TO THE
CORRECT LOCATION
Sheet A-620 – Partition types – Wall type A head condition was modified to show a brace back to structure
Sheet A-620 – Partition types - Wall type C head condition was modified to not attach to the gyp structure above.
The gyp structure above also has more detailed description on assembly buildup.
Sheet A-620 – Partition types – Head conditions were renamed and modified on floor plan.
Sheet A-620 – Partition types – drawing 2 was removed.
Sheet A-630 – Partition Type Sheet J – drawing 1 sheet metal note amended, and note with 3” barrier tape has been amended to 2” fully conductive barrier tape.
Sheet A-630 – Partition Type Sheet J – drawing 2 – notes amended for attachment of barrier to waveguides not housing and note removed at ductwork after DI break.
Sheet A-630 – Partition Type Sheet J – drawing 3 metal sleeve note has been amended.
Sheet A-630 – Partition Type Sheet J – drawing 4 has been modified to remove the bellow from the vapor barrier install and the drawing has been revised.
Sheet A-630 – Partition Type Sheet J – head condition revised on partition section.
Sheet A-630 – Partition Type Sheet J – sheet metal notes amended to be AL 40 everywhere, where sheet metal was called out.
Sheet A-631 – Partition Type Sheet K – Drawing 1 amended detail for connection of soffit to wall below. Notes we\re also revised to AL40 from AL20
Sheet A-801 – schedules and types – doors. – Note added: “THE DOOR DETAILS PROVIDED ARE USING
LOCKMASTER DOOR IN A BOX CONTROLLED DOOR AS A BASIS OF DESIGN. REFER TO SELECTED MANUFACTURER
INSTALLATION DETAILS PRIOR TO FRAMING AND INSTALL.”
Attachments:
Full Arch Drawing set : 2026.060 NATIONAL GUARD JFHQ SCIF COMPLIANCE UPGRADE IFP Addendum 1_Stamped and Sealed
Requested By the Architect:
Name and Date: Jestin Gieck (07/14/2026)
END OF ARCHITECT’S SUPPLEMENTAL INSTRUCTION
07/22/2026
File details come from the government source that posted it. Updated .