MASSACHUSETTS BAY TRANSPORTATION AUTHORITY
MBTA CONTRACT NO. A90CN06
FTA GRANT NOS: R05A04
DOWNTOWN CROSSING STATION
VERTICAL TRANSPORTATION IMPROVEMENTS
BOSTON, MASSACHUSETTS
ADDENDUM NO. 2
The attention of bidders submitting bids for the above project is called to the following Addendum to the
Supplementary Conditions, Construction Specifications and Contract Drawings.
The items set forth herein, whether of omission, addition, or substitution, are to be included in, and form a
part of the Bid submitted.
THE NUMBER OF THIS ADDENDUM (NO. 2) MUST BE ENTERED IN THE SPACE
PROVIDED ON PAGE 00410-3 OF THE FORM FOR BID, IN THE BID FORM.
November 16, 2015
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By:
Frank Depaola
General Manager of the MBTA
ADDENDUM NO. 2
Page 1 of 16
PRE-NUMBERED PROPOSAL ENVELOPE
(No Changes)
BID FORM
(No Changes)
GENERAL CONDITIONS
(No Changes)
CONSTRUCTION SPECIFICATIONS
1.
After Specification Section 10523, FIRE EXTINGUISHERS: Add new Specification
Section 13129, PREFABRICATED BOOTHS (12 pages) included as Pages 5 through 16
of this Addendum. In the Table of Contents, under DIVISION 13: SPECIAL
CONSTRUCTION: Add new Specification Section 13129, PREFABRICATED
BOOTHS (12 pages) included as Pages 13129-1 through 13129-12.
2.
Page 14210-6, Article 1.9, QUALITY ASSURANCE, Paragraph C: Where it reads “Buy
American” revise to read “Buy America”.
3.
Page 05721-4, Article 2.1, STAIR RAILINGS AND GUARDS, Paragraph A, 2: Where it
reads “Satin # 6” revise to read “Satin # 4”. And where it reads “0.5 microns” revise to
read “0.7 microns”.
4.
Page 05721-4, Article 2.2, RAILING AT WINTER ST. CONCOURSE, Paragraph A, 2:
Where it reads “Satin # 6” revise to read “Satin # 4”. And where it reads “0.5 microns”
revise to read “0.7 microns”.
5.
Page 05721-4, Article 2.3, FENCING AND GATES AT ENTRY/EXIT LOCATIONS,
Paragraph B and B, 1: Where it reads “Satin # 6” revise to read “Satin # 4”. And where it
reads “0.5 microns” revise to read “0.7 microns”.
6.
Page 05721-8, Article 2.11, STAINLESS-STEEL FINISHES, Paragraph C and C, 1:
Where it reads “Satin # 6” revise to read “Satin # 4”. And where it reads “0.5 microns”
revise to read “0.7 microns”.
CONTRACT DRAWINGS
(No Changes)
ADDITIONAL ITEMS
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ADDENDUM NO. 2
Page 2 of 16
(No Changes)
QUESTIONS AND ANSWERS
Q-1
The fire rated glass door details provided in the contract drawings appear to be the typical
details used by two companies that cannot meet the buy America requirements for the
project and will require a waiver. We can provide fire rated glass doors and meet the buy
America requirements but the details will significantly differ from those on the contract
drawings. Please advise if a waiver will be provided or if it will be acceptable to provide an
alternative product for the fire rated doors that can meet the Buy America requirements.
A.
Fire Rated Glass Doors assemblies meeting the buy America provision and differ from the
contract drawing details will be allowed. However, the detail deviations must be limited to the
parameters defined in Specification Section 08113, FIRE RATED GLASS AND FRAMING
SYSTEMS. Refer to Article 2.2 PERFORMANCE REQUIREMENTS.
Q-2
Drawing A-4480 Details 1 & 2 show a pre-manufactured booth. Please provide additional
details and specifications for this booth?
A. The Prefabricated Booth shall meet MBTA Design Standards, achieve ADA compliance, and be
of nominal size 6’-0” W by 8’-0” L by 8’-0” H. Specification Section 13129,
PREFABRICATED BOOTHS has been added. Refer to the Contract Specifications section
of this Addendum.
Q-3
Specification section 14210 Electric Traction Elevators Paragraph 1.9 Quality Assurance
References “Buy American” please confirm this should read “Buy America”. “Buy
America” is listed everywhere else in the specifications.
A. Correct. Article 1.9, QUALITY ASSURANCE, Paragraph C will be revised with reference to
“Buy America” provisions not “Buy American” provisions. Refer to the Contract Specifications
section of this Addendum.
Q-4
Specification Section 05721 Ornamental Railing Assemblies calls for a Satin #6 polished
finish on the Gates, Railings, & Fences. It will be nearly impossible to repair any scratches
or damage in a number #6 finish in the field. We recommend using the standard #4 finish
which can be more easily repaired in case any damage occurs during installation or in the
future.
A. A #4 polished finish will be allowed for the Gates, Railings and Fences of the Ornamental Railing
Assemblies. Refer to the Contract Specifications section of this Addendum.
Q-5
Note E on sheet S-4204 “THE STRUCTURAL CAPACITY OF THE CHAMBER LEVEL
SLAB SHALL NOT BE EXCEED” What is the structural capacity of the chamber level
slab?
A. The intent of the Note E on sheet S-4204 “THE STRUCTURAL CAPACITY OF THE
CHAMBER LEVEL SLAB SHALL NOT BE EXCEEDED” is to stress that the temporary
support design is to pick up the concentrated loads from Orange Line slab and distribute them all
the way down to the Red Line North Passageway foundation slab (see S-4204). Contractor shall
not support these loads solely by the Chamber Level slab without additional support below. The
contractor shall submit the proposed temporary support system to the Engineer for approval.
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ADDENDUM NO. 2
Page 3 of 16
Q-6
Detail 1 on Sheet E-4400 show 3/8” stainless steel rod and 1-5/8” Channel. Please clarify
whether the steel rod and channel are propose or existing.
A. All BOLD text and symbols are NEW TO BE INSTALLED unless noted otherwise.
Q-7
Q&A 11 of addendum 1 state “assume a total cumulative quantity of 1200SF concrete
repair at designated Winter Street Concourse surfaces”
a.
What should the Contractor assume for the thickness of concrete repair?
b.
Is 1,200SF of concrete repair included repair at the walls and the floor?
A. a. 1 to 4 inches for an average of 2 inches thick.
b. Yes.
Q-8
General Condition Section 00700 6.2 A “Milestone #2 – Access through the Burnham
Building included Floor Level B2, and B3, and the Ramp shall end by 301 days after NTP.”
Can the milestone #2 end by 301 days after Access Restraint Date instead after NTP?
A. No.
Q-9
Does Contractor to assume to dispose the concrete materials from selective demolition of
walls/floors as CLEAN (non-contaminated) material?
A. Yes. Refer to Hazardous Material Specifications for abatement information for any known
contaminants.
Q-10
Does Contractor to assume to dispose the brick/tile materials from selective demolition of
walls/floors as CLEAN (non-contaminated) material?
A. Yes. Refer to Hazardous Material Specifications for abatement information for any known
contaminants.
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ADDENDUM NO. 2
Page 4 of 16
SECTION 13129
PREFABRICATED BOOTHS
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
DESCRIPTION OF WORK
A.
This Section specifies the following:
1.
Fabrication and installation of ADA compliant, Customer Service Attendant (CSA)
Booths as described herein.
2.
Work of this Section also includes all glazing, doors, painting, hardware, interior finishes,
security systems, electrical systems, HVAC, and millwork, for each booth and enclosure.
3.
Provide all security systems required for booths.
B.
Work shall include, but not be limited to, providing all materials, methods, equipment, specified
herein, and installation for the complete booths and enclosures.
C.
Related Work: Carefully examine all of the Contract Documents for requirements which affect
the work of this Section. Other specification sections that relate directly to work of this Section
include, but are not limited to, the following:
1.3
1.
Division 15, MECHANICAL; for HVAC unit connections.
2.
Division 16, ELECTRICAL; for Electrical connections including conduit and wiring for
power and lighting.
QUALITY ASSURANCE
A.
Source: Provide booths and enclosures that are products of one manufacturer. Provide
secondary or accessory materials that are acceptable to manufacturers of primary materials.
B.
Installer: A firm that is acceptable to the manufacturer of the booths and enclosures.
C.
Coordination: Coordinate electrical and security equipment and conduit stub-up locations with
requirements of Division 16 before installation of the Booth.
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PREFABRICATED BOOTHS
13129 - 1
ADDENDUM NO. 2
Page 5 of 16
1.4
SUBMITTALS
A.
Product Data: For each type of product.
1.
B.
Shop Drawings: For control booths. Include plans, elevations, sections, details, accessories, and
fastening and anchorage details, including mechanical fasteners.
1.
C.
Include construction details, material descriptions, dimensions of individual components
and profiles, and finishes for control booths.
Anchor-Bolt Plans: Submit anchor-bolt plans and templates. Include location, diameter,
and projection of anchor bolts required to attach control booths to foundation. Indicate
post reactions at each location.
Samples: For each type of exposed finish in manufacturer's standard sizes.
1.
Include Samples of wall panels and accessories to verify finish selection.
D.
Sample Warranty: For special warranty.
E.
Maintenance Data: For control booths to include in maintenance manuals.
1.5
DESIGN STANDARDS
A.
The requirements of this Section are based on designs as shown on the Contract Drawings and
the Authority's design standards.
1.
1.6
The configuration of the booths and enclosures and location of principal components
shall be as indicated on Contract Drawings.
WARRANTY
A.
Special Warranty: Manufacturer agrees to repair finish or replace control booths that fail in
materials or workmanship within specified warranty period.
1.
Warranty Period: Five years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1
PERFORMANCE REQUIREMENTS
A.
Structural Performance: Control booths shall withstand the following loads and stresses within
limits and under conditions indicated according to ASCE/SEI 7:
1.
Design Loads: As follows:
a.
b.
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Dead Loads: Weights of materials and construction.
Live Loads: 50 pounds per square foot.
PREFABRICATED BOOTHS
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ADDENDUM NO. 2
Page 6 of 16
c.
2.
Deflection Limits: Design framing systems to withstand design loads without deflections
greater than the following:
a.
B.
Deflection of 1/360 of the span.
Thermal Movements: Allow for thermal movements from ambient and surface temperature
changes.
1.
C.
Roof Loads: N/A
Temperature Change: 120 deg. F, ambient; 180 deg. F, material surfaces.
Ballistic Resistance: Provide components, including windows, walls, and doors, identical to
those tested for compliance with requirements indicated, and as follows:
1.
2.
Listed and labeled as Level 1 when tested according to UL 752.
Type IIA when tested according to NIJ STD-0108.01.
D.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by
a qualified testing agency, and marked for intended location and application.
E.
Safety Glazing Products: Category II materials complying with testing requirements in
16 CFR 1201.
1.
F.
2.2
Subject to compliance with requirements, obtain safety glazing products permanently
marked with certification label of manufacturer acceptable to authorities having
jurisdiction.
Regulatory Requirements: Comply with applicable provisions in the U.S. Architectural &
Transportation Barriers Compliance Board's ADA-ABA Accessibility Guidelines and
ICC A117.1.
FABRICATED STEEL CONTROL BOOTHS
A.
General: Fabricate ADA compliant control booths from an integrated set of mutually dependent
components to form a completed assembly, ready for installation on Project site.
B.
Available Manufacturers: Subject to compliance with requirements, manufacturers offering
products that may be incorporated into the Work include, but are not limited to, the following:
1.
2.
3.
4.
Austin Mohawk, Utica, New York;
Porta-King Building Systems, Carth City, MO;
Mardan Fabricators, Inc., Coral Springs, FL;
Or approved equal.
C.
Building Style: Standard square corners.
D.
Size: nominal 6 feet by 8 feet.
E.
Height: Nominal outside height 90 to 96 inches. Interior floor to ceiling height 83 inches
(minimum).
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ADDENDUM NO. 2
Page 7 of 16
F.
Structural Framework: Fabricated from 2-by-2-by-0.075-inch steel structural or mechanical
tubing. Connect framework by welding.
G.
Doors: Swinging door on back.
1.
Swinging Door: 1-3/4 inches thick; tubular-frame design fabricated from galvanized
steel; with top half of door glazed. Equip door with full weather stripping.
a.
b.
H.
Windows: Extruded-aluminum sash frames glazed with ballistic-resistant glazing, UL 752
Level 1.
1.
Fixed windows on three (3) sides and one slider with insect screen and positive locking
device (similar to that indicated on Drawings).
a.
2.
3.
4.
I.
Operable windows: Equip windows with cam locks, weather stripping, and
stainless-steel ball-bearing rollers.
Frame Finish: Manufacturer's standard mill or clear anodic.
Screens: Security screens for each window.
Corner Shape: Square.
Hardware: Comply with the requirements of Sections 08711, DOOR HARDWARE, except as
modified herein.
1.
Materials: All hardware shall be of the best grade materials, entirely free from
imperfections in manufacture and finish.
a.
b.
2.
Supply all hardware with matching fasteners.
All finishes shall match satin stainless steel.
Keying Requirements: Key all locksets as directed by the Authority, match existing
station keying.
a.
b.
All cylinders shall haw removable cores.
Trim: As specified with knobs cast or forged of 0.080 wall thickness.
3.
Manufacturers: All hardware shall be made in America and approved by the Authority.
4.
Finish Hardware Schedule: Entry door for each booth shall have:
a.
b.
c.
d.
e.
5.
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Glazing: Fixed unit with ballistic-resistant glazing, UL 752 Level 1.
Hardware: See hardware section below.
Hinges: Provide CBP standard#12252 continuous hinge in satin stainless steel
finish.
Lockset: Sargent #7745 mortise x KDA x US 26D with standard ANSI strike and
Best Lock Co. removable core cylinder x random key.
Closer: LCN 4040 x Aluminum finish stop side mounted.
Threshold: Dorbin #79A
2 Mop/Kick Plate
Drawers: Each drawer shall have:
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ADDENDUM NO. 2
Page 8 of 16
a.
b.
c.
6.
Coat Hooks: 2 Stainless steel hooks fabricated by manufacturer of booth.
7.
Interior Access Panel to Fare Box: Each panel shall have:
a.
b.
8.
9.
1 pair Spring Hinges, 2 in. long.
1 Transom Catch with Rim Strike
Interior Raceway Doors shall have:
a.
b.
Hidden hinges max. 16 in. o.c.
Security Camlock
Casework Doors: each door shall have:
a.
b.
J.
1 Pull, US28.
1 Pair Slides.
In addition to above, cash drawer is to have drawer dividers of 18 ga. stainless
steel per MBTA standard.
1 Security Camlock.
2 Hinges, overlay type.
Wall Panel Assembly: Assembly consisting of exterior face panel fabricated from 0.079-inch
nominal-thickness, galvanized-steel sheet; and interior face panel fabricated from 0.064-inch
nominal-thickness, galvanized-steel sheet; with 2-inch-thick, rigid fiberglass or polystyrene
board insulation in cavity between exterior and interior face panels. Ballistic resistant wall
panels UL 752 Level 1.
1.
Gypsum Wallboard: 1/2 in. thick fire-rated, ASTM C36, Type X. Provide tape, joint
compounds, and installation conforming to the requirements of Section 09260.
K.
Base/Floor Assembly: No perimeter frame, with finished floor fabricated from 0.108-inch
nominal-thickness, galvanized, rolled steel tread plate.
L.
Flat Roof/Ceiling Assembly: Assembly consisting of exterior roof panels, interior ceiling
panels, and insulation between exterior and interior panels; sloped to drain at booth perimeter.
1.
2.
3.
Exterior Roof Panel: Fabricated from 0.079-inch nominal-thickness, galvanized-steel
sheet; with painted finish, continuously welded seams.
Interior Ceiling Panel: Fabricated from 0.079-inch nominal-thickness, galvanized-steel
sheet; with fiberglass insulation in cavity between ceiling and roof.
Canopy Fascia: Fabricated from 0.079-inch nominal-thickness, galvanized-steel sheet, of
manufacturer's standard design.
a.
b.
4.
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Height: 12 inches.
Overhang: Flush with face of walls below.
Metal Ceiling: Provide 24 in. by 24 in. perforated aluminum units with color and
perforation pattern selected by engineer. Provide panels fabricated from minimum 0.040
in. thick metal. Provide ceiling panel products of one of the following manufacturers that
meet or exceed the requirements of these specifications, or Engineer approved equal:
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ADDENDUM NO. 2
Page 9 of 16
a.
b.
c.
M.
Work Counters: Full width of control booth, reinforced; with 16-inch-wide storage/cash drawer
below each counter and an access opening for electrical cords at each rear corner of counter.
1.
2.
N.
Material: 0.078-inch-thick, stainless-steel sheet.
Depth: 22 inches.
Electrical, General: Provide booths with complete interior electrical work, installed as Work of
this Section. Conform to applicable Sections of Division 16. Include electrical Work for the
booths as indicated on the Drawings.
1.
Basic Materials and Methods:
a.
2.
O.
Provide empty 3/4 in. steel conduits with pull lines, as indicated on the Contract
Drawings for installation of communications equipment by others.
Distribution Panelboards:
a.
Booth shall have panelboard; 120/108 volt, three-phase, four-wire, with quantity of
12 stab-lock type molded case 20 amp circuit breakers as indicated on Contract
Drawings.
b.
Final connection and wiring to Booths electrical service shall be performed by and
comply with requirements of Division 16, Electrical.
3.
Booth Intercom Systems: Provide a switchable continuous communication system
mounted on transparent armor panel to allow communication between a person in the
Booth and a person immediately outside. Provide system complete and operational.
4.
Provide provisions for a Booth Security System. The booth telephone shall be fed from
the alarm panel. Provisions shall be provided for connection to the Verizon demarcation
from the alarm panel per Booth Security System Specification that is specified in
Division 16, ELECTRICAL.
5.
Public Address System: Provide provisions for public address system interface in the
Booth.
6.
Fire Alarm Pull Station: Provide provisions for fire alarm pull station in the Booth.
Lighting Fixtures: Provide two ceiling-mounted fluorescent lighting fixtures of one of the
following products, with an Osram D26W 41 K lamp in each fixture. Provide single-pole switch
mounted adjacent to door to control lighting fixture.
1.
2.
3.
4.
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Simplex Ceiling Corp.
Steel Ceilings.
Architectural Surfaces, Inc.
Edison Price Dark Lite DTT-16 8, 120 volts;
Prescolite CF123526-462;
NL RF-1211;
Or approved equal.
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ADDENDUM NO. 2
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P.
Heating Unit: Wall-mounted, thermostatically controlled, 120-V, 1000-W electric heater with
fan-forced operation and with capacity of not less than 3410 Btu/h. Enclose in enameled-steel
cabinet and mount under work counter. Wiring shall include a separate wall switch.
Q.
Cooling Unit: Roof-mounted, thermostatically controlled, 120-V, air conditioner with cooling
capacity of not less than 6,000 Btu/h, located above ceiling, with access from within the booth,
include a cord and plug connection to the power supply receptacle: provide air conditioner with
a 1/2 in. drain line from unit, enclosed down side wall of Booth, to condensate drain line.
Wiring shall include a separate wall switch.
R.
Centrifugal Exhaust Fan: 25 CFM, 120 volt, single-phase with damper.
1.
S.
As an Alternate, the exhaust fan may be incorporated into the air conditioner unit, as
approved by the Engineer.
Accessories: Provide the following for each control booth:
1.
2.
Through-wall transaction drawers and speaking apertures.
Intercom.
T.
Anchorage: Postinstalled anchors fabricated from non-ferrous or corrosion-resistant materials,
with allowable load or strength design greater than or equal to the design load as determined by
testing conducted by a qualified testing agency.
U.
Materials:
1.
2.
3.
4.
5.
6.
7.
Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, commercial quality, G90
coating designation; mill phosphatized.
Galvanized, Rolled Steel Tread Plate: ASTM A 786/A 786M, rolled from steel plate
complying with ASTM A 572/A 572M, Grade 55; hot-dip galvanized according to
ASTM A 123/A 123M.
Steel Structural Tubing: ASTM A 500/A 500M, Grade B.
Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.
Steel Mechanical Tubing: ASTM A 513, welded-steel mechanical tubing.
Zinc-Coated (Galvanized) Steel: Hot-dip galvanized according to ASTM A 123/A 123M.
Aluminum: Alloy and temper recommended by aluminum producer and manufacturer for
type of use and finish indicated, and as follows:
a.
b.
c.
8.
9.
10.
11.
12.
V.
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Sheet: ASTM B 209.
Extruded Shapes: ASTM B 221.
Rolled Tread Plate: ASTM B 632/B 632M, Alloy 6061-T4 or Alloy 6061-T6.
Stainless-Steel Sheet: ASTM A 666, Type 304.
Plastic Laminate: NEMA LD 3, HGS or HGL grade.
Plywood: DOC PS 1, Exterior grade.
Particleboard: ANSI A208.1, Grade M-2.
Ballistic-Resistant Glazing: Tested to comply with bullet-resistant testing level indicated.
Finish: Immediately after cleaning and pretreating, apply manufacturer's standard two-coat,
baked-on finish consisting of prime coat and thermosetting topcoat. Provide painting materials
that conform to requirements specified under Section 09900, PAINTING.
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ADDENDUM NO. 2
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1.
2.3
Color and Gloss: As selected by Engineer from manufacturer's full range.
FABRICATION
A.
Factory fabricate control booths completely.
B.
Factory preglaze windows and doors.
C.
Factory prewire control booths, ready for connection to service at Project site.
D.
Accessible Control Booths: Where indicated to be accessible, fabricate control booths as
follows:
1.
2.
3.
4.
5.
Provide service windows located no higher than 34 inches above exterior grade.
Provide door opening with minimum 32-inch clear width.
Provide minimum 60-inch clear turning spacing within the booth.
Provide minimum 27-inch clearance beneath interior work surfaces. Locate work
surfaces 28 inches minimum and 34 inches maximum above the floor.
Locate controls and operable parts no lower than 15 inches and no higher than 48 inches
above the floor where reach is unobstructed. Where side reach is obstructed, locate
controls and operable parts no lower than 15 inches and no higher than 46 inches above
the floor.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine substrates, areas, and conditions, with Installer present, for compliance with
requirements for installation tolerances, including concrete bases; accurate placement, pattern,
and orientation of anchor bolts; critical dimensions; and other conditions affecting performance
of the Work.
B.
Examine roughing-in for electrical and communication systems to verify actual locations of
connections before control booth installation.
C.
Prepare written report, endorsed by Installer, listing conditions detrimental to performance of
the Work.
D.
Proceed with installation only after unsatisfactory conditions have been corrected.
3.2
INSTALLATION
A.
Install control booths according to manufacturer's written instructions.
B.
Accessible Control Booths: Install with interior floor surface no more than 1/2 inch above the
elevation of adjacent floor surfaces.
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ADDENDUM NO. 2
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C.
Set control booths plumb and aligned. Level baseplates true to plane with full bearing on
concrete bases.
D.
Fasten control booths securely to concrete base with anchorage indicated.
E.
Connect to electrical power service and data systems.
F.
Perform startup checks of heating and cooling units according to manufacturer's written
instructions.
G.
Metals: Specification Section 05500, MISCELLANEOUS METAL, with modifications as
follows:
H.
1.
Workmanship: Metal surfaces shall be clean and free from mill scale, flare rust, and rust
pitting, well-formed and finished to shape and size, with sharp lines, angles, and smooth
surfaces. Weld all permanent connections. Welds shall be continuous except where tack
welding is permitted by the Authority.
2.
Use screws or bolts only where shown: Where used, heads shall be countersunk,
unexposed screws will be flathead, screwed up tight and threads shall be niched to
prevent loosening. Exposed screws shall be stainless steel oval head Phillips Type.
3.
Thickness of metals and details of assembly and support shall give ample strength and
stiffness.
4.
Provisions for Hardware and Equipment: Panels and Doors shall be prepared by
manufacturer for the installation of hardware and equipment. Welding of hinges to frames
will not be permitted.
Metal Acoustical Ceiling
1.
Metal ceiling shall be installed as per the manufacturer's instructions.
2.
Install edge molding along perimeter and to finish off all ceiling edges.
I.
Painting and Finishing Specification Section 09900, PAINTING. Apply painting systems
specified hereinbefore.
J.
Modular Panel Construction
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1.
General: Booths and enclosures shall be an assembly of standardized modular panels and
base and roof assemblies attached by connector bolts to adjacent panels, roof and base
assemblies. Each panel shall be an independent unit which meets specific structural and
operational requirements and contains specific optional equipment and associated
services while maintaining ballistic integrity.
2.
Performance: Booths and enclosures shall be capable of assembly, disassembly and
relocation, and selected repairs or replacements by not more than a four-man crew and a
foreman with limited hand tools. To accomplish this, booths and enclosures shall be
constructed of various panels which shall independently contain, as a minimum: coin
change provisions, air conditioner, electric heaters, lighting, lock security,
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ADDENDUM NO. 2
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interior/exterior communications, visual alarm, emergency lights and communications,
and interior telephone connections. One panel shall provide structural support and
attachment for a fare/turnstile. Other panels shall include or provide structural support for
interior countertops, cash drawer, coin tray, coat hangers, communication system and
control raceway and personal storage drawers, speaker and microphone housing which
shall be provided as part of the Booth.
3.
Design and Construction Modular Panels and Sections
a.
Each integrated modular panel or roof or base section shall not exceed 500 lbs. or
7'-6" by 8" in size. Each unit will be capable of handling by a four-man crew.
b.
The opaque armored panel certified to meet specifications as noted in herein shall
be 2" thick, constructed from welded steel construction with ballistic resistance of
UL 752 Level 1, as follows:
1)
2)
3)
4)
5)
c.
Vision Panels: Install vision panels at locations indicated.
d.
Door Panels: Install door panels and hardware as directed by manufacturer.
e.
The modular roof shall be constructed of stainless steel sheet laminated to 3/4 in.
plywood with fasteners and an internal layer of fiberglass insulation, 4 in. thick for
thermal and sound insulation. Insulation shall provide a U-factor of minimum 0.09.
Provide fluorescent lighting and an acoustical ceiling suspended by wire supports.
Support angles and flanges welded to modular panels and bolted to roof membrane
shall secure roof assembly to panelized construction.
1)
2)
K.
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2015
The exterior surface shall be a layer of bullet resisting stainless steel wall
armor.
The second layer (internal layer) shall be semi-rigid insulation 2" thick for
thermal and sound insulation. Insulation shall provide an "R" factor of 8.7
minimum.
The third or interior layer shall be bullet resistant stainless steel wall armor.
All layers shall be secured with vertical stiffener channels to form a
structural panel to meet structural and low thermal conductivity
requirements within the 2" thickness requirements.
The modular panels shall have watertight joints and fasteners which are
accessible only from the interior. The panels shall be joined together
through bolted connections and concealed with a removable bullet resistant
stainless steel cover plate applied by hook and loop type fasteners.
Flexible fire retardant plastic conduit shall be integral bonded in the modular
panels and pre-wired to electrical outlets and switches, and communication
and telephone connections. The modular panel will not contain junction
boxes or internal inaccessible connections.
Coordinate with Electrical Sections and provide for emergency gate release
switches and pilot lamps.
HVAC Installation: Install air conditioning units within booth ceilings with removable stainless
steel louvers for servicing.
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ADDENDUM NO. 2
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1.
Air Conditioning
a.
b.
c.
2.
Electric Wall Heaters
a.
b.
L.
Heaters shall be controlled from wall switches, as indicated on Contract
Drawings.
Manufacturer shall provide two flush mounted electric heaters.
Electrical
1.
Make provisions in pre-fabricated walls for raceways and conduits. Pre-cut electrical
outlets and other required openings.
2.
Distribution Panelboards
a.
Locations of panel boards shall be as indicated on Contract Drawings.
3.
Lighting: Specification Section 16500, LIGHTING.
4.
Booth Intercom: Install booth intercom systems complete and operable in accordance
with the following:
a.
b.
c.
3.3
Mount air conditioners above ceilings within booths at the location indicated on
Contract Drawings or as directed by Engineer.
Drain line running from air conditioning unit shall be connected to a floor drain
provided by station contractor in a secure manner so that the line cannot be
accidentally removed.
Unit shall be controlled by wall switch, as indicated on Contract Drawings.
National Electrical Code
MBTA Manual of Guidelines and standards
Manufacturer's recommendations
ADJUSTING
A.
Adjust doors, operable windows, and hardware to operate smoothly, easily, properly, and
without binding. Confirm that locks engage accurately and securely without forcing or binding.
B.
Lubricate hardware and other moving parts.
C.
After completing installation, inspect exposed finishes and repair damaged finishes.
A90CN06
2015
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ADDENDUM NO. 2
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PART 4 - MEASUREMENT AND PAYMENT
4.1
MEASUREMENT
A.
4.2
A.Separate Measurement will not be made for the work of this Section complete in place, but all
costs, therefore, shall be included in the Contract Lump Sum Price for the work as indicated
herein. All preparation and incidental work necessary to accomplish the installation will be
considered incidental to the Lump Sum price.
PAYMENT
B.
4.3
A.Separate Payment will not be made for the work of this Section complete in place, but all
costs, therefore, shall be included in the Contract Lump Sum Price for the work as indicated
herein. All preparation and incidental work necessary to accomplish the installation will be
considered incidental to the Lump Sum price.
PAYMENT ITEMS
ITEM NO.
DESCRIPTION
UNIT
0130.137
ALL OTHER WORK
LS
END OF SECTION
A90CN06
2015
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ADDENDUM NO. 2
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