Bid-Addendum-2---2026-0320.pdf

Mattawoman M.S. - Roof Replacement Bid Addendum 2 Page 1 of 7

ADDENDUM NO. 2

March 20, 2026

RE: CCPS Bid # MMSSRR 1-2627

Mattawoman Middle School Roof Replacement

FROM: Planning & Construction Department

5985 Radio Station Road La Plata, MD 20646

TO: PROSPECTIVE BIDDERS

This addendum forms a part of the Contract Documents and modifies the Original Bidding Documents as noted below. Acknowledge receipt of this Addendum in the space provided on the Form of Proposal. Failure to do so may subject the Bidder to disqualification. This Addendum consists of twenty (20) specification pages and a full set of drawings.

1. CHANGES TO THE BID DATE AND TIME:

None

2. CHANGES TO BID LOCATION:

The Bid Location has been changed to:

Charles County Public Schools – Admin. Offices Staff Development Room 5980 Radio Station Rd La Plata, Maryland 20646

See revised specification section 000102-R1 attached

NOTE: Please make sure to allow enough time to enter through secure front doors, sign-in, and take the elevator to the Staff Development Room before the bid-opening at 1:00 pm. Ms. Pond will be at that location starting at 12:00 pm to receive bids.

3. CHANGES TO THE SPECIFICATIONS:

Section 004213 - Form of Proposal is Replaced with new

Section 004213-R2 – Form of Proposal.

This form is revised to include intended Work Hours; These hours supersede ANY other listed Hours, including any hours listed in 011100 – Summary of Work.

Bid Addendum 2 Page 2 of 7

4. CHANGES TO THE SPECIFICATIONS:

Section 075420 – Thermoplastic Roofing

Change Paragraph 2.1.C.2 to be:

2.1 C. 2. Exposed Face Color: Gray (as selected from manufacturers color options)

5. ADD SPECIFICATION SECTION

Add new Specification Section 264113 – Lightning Protection for Structures.

See Images 5, below, for general roofing and lightning protection coordination.

6. CHANGES TO DRAWINGS / DETAILS

6.1 Sheet A-102 Provide ALL RTUs with new condensate piping to nearest roof drain.

See Images 1 and 2, below, for general configuration and roof protection.

6.2 Sheet A-102 Provide ALL Condenser Units ( Mark ‘AC’ on plans with nearby associated ‘M’ symbols) shall utilize a Refrigerant Pipe Curb Detail as shown in Image 3 below.

Refrigerant piping shall utilize long sweep elbows.

All Refrigerant piping shall receive 1” Armaflex insulation with embossed aluminum jacketing.

6.3 Sheet A-102 Provide two sets of Pararail safety Working Edge rail systems.

Basis of Design is Pararail by Bluewater, other systems are acceptable.

See image 4, below, for overall detail.

6.4 Sheet A-103 KeyNote 6: Revise note to read “ 6 - REMOVE EXISTING AND

PROVIDE NEW 2-INCH RIGID INSULATION WITH 3M VENTURECLAD

SILVER EMBOSSED COVER ON ALL DUCTWORK. SEE PHOTO 7 /

PH-01”

See image 6, below, for added detail, including proper tapered top insulation.

6.5 Sheet A-301 Change base roof insulation from 1 ½” thick to 2.6” thick.

See Image 7 below.

6.6 Sheet PH-01 Bid Alternate 1 plans do not have images, please revert back to original Bid Plans for Images.

Bid Addendum 2 Page 3 of 7

7. GENERAL NOTES AND CONDITIONS

A) Contractor shall vacuum above all lay-in ceilings to remove excessive debris from roof work.

B) Roof Area ‘C’ is the cafeteria and adjacent corridor space which is exposed structure and lighting.

C) During the building walk-thru (Pre-Bid Meeting) it was noted that the existing roof deck has conduits within the flute area, subject to fastener damage. Field investigation is critical to coordinate to prevent damage as well as worker safety.

D) Exposed Structure Ceilings have speaker and fire alarm devices attached directly to the metal roof deck. Caution needs to be exercised to prevent damage during roof removal and replacement.

E) Provide roof manufacture approved separation from any asphalt. Asphalt separation shall be required at existing roof curbs, existing vent pipes, existing utility curbs, wall flashings, and all similar locations. Typical separation may be aluminum tape or Densglas as approved by roof manufacturer. Provide Mock-up for each type of separation barrier location.

F) Most roof details do not show limits of wood blocking. Provide ALL wood blocking and grounds as required to meet roof manufacturer’s 30-year details.

G) Roof work must include roof walkway pads below ALL condensate support blocks between RTU’s and nearest Roof Drain. Typical roof walkpad below supports are 12” x 12”, adhered to roof . Adhere condensate pipe support to roof walkway pad. See image 2 below.

H) Bid Alternate 5 – Lightning Protection will require 4” x 4” roof material every 3-feet along lightning cables and under clamps and air terminals. See Images 5 below for illustration.

8. SPECIAL MECHANICAL NOTES

M1 ALL RTU’s shall receive ALL new condensate traps with drain plugs and condensate drain pipe to top of nearest roof drain. Provide 12” x 12” roof walkway below each pipe support. Images 1 and 2 below for example.

M2 The Mechanical Curb, adjacent to the RTU’s MUST be raised to a similar configuration as shown on Image 8, below.

M3 Add the following note to Sheete ME-001 – Detail Rooftop Unit Typical - Mechanical :

NOTE: RTU Raising Requires extending: 4-pipe Mechanical System piping including chilled water, pneumatic controls, ductwork. Field verify all requirements prior to disconnecting.

9. CONTRACTOR QUESTIONS

Question: What is desired work for summer 2026?

Answer: Would expect roof areas with least mechanical coordination, such as Roof Areas: C,D,E,F-1, G, G-1, S-1, S-2 and S-3….. Roof Areas are negotiable.

Bid Addendum 2 Page 4 of 7

10. IMAGES FOR REFERENCE:

Image 1: TYPICAL RTU CONDENSATE DRAIN TRAP DETAIL

Image 2: Condensate piping with proper support

Bid Addendum 2 Page 5 of 7

Image 3: Refrigerant Pipe Curb

Image 4: PARARAIL DETAIL - PROVIDE 2 SETS

( Roof Area C and Roof Area F-1)

Bid Addendum 2 Page 6 of 7

Image 5: Lightning Protection System with Proper Roof Protection

Image 6: Typical Exterior Ductwork Insulation Detail

Bid Addendum 2 Page 7 of 7

Image 7: Bid Alternate #3 - Modular Roof Insulation Thickness

Image 8: Adjust Detail from ME-001 for RTU Power

*** End of Bid Addendum 2 ***

Bid Information - Bid Addendum 2 000102-R1 – 1 of 1

CHARLES COUNTY PUBLIC SCHOOLS

LA PLATA, MARYLAND

BID INFORMATION

BID TITLES Mattawoman Middle School Roof Replacement

BID NUMBERS: MMSSRR 1-2627

PRE-BID CONFERENCE: March 3, 2026, 3:30 P.M.

(At Mattawoman Middle School) Mandatory Meeting to Bid

CLARIFICATION QUESTIONS: Due By: March 17, 2026

BID OPENING DATE: March 25, 2026, 1:00 P.M.

BID DELIVERY ADDRESS: Bids are to be sealed and hand delivered to:

Charles County Public Schools – Admin. Offices Staff Development Room 5980 Radio Station Rd La Plata Maryland 20646

PLACE OF BID OPENING: CHARLES COUNTY PUBLIC SCHOOLS

Administrative Office Building Staff Development Room

5980 Radio Station Road La Plata, Maryland 20646 (Stair access only)

PURCHASING AGENT: PLANNING & CONSTRUCTION

TELEPHONE: (301) 934-7290

Contact Susan Pond (spond@ccboe.com) for special submission of bids if needed due to limited access via stairs.

mailto:spond@ccboe.com

Form of Proposal - Bid Addendum 2 004213-R2 - 1 of 8

SECTION 004213-R2

FORM OF PROPOSAL

PROJECT TITLE: Mattawoman Middle School – Roof Replacement

BID NUMBER: MMSSRR 1-2627

Submitted this ________ day of ____________________________________2026 by

Business Address

SUBMITTED TO: Charles County Public Schools, Charles County Board of Education

Charles County, Maryland

1. This bidder declares that the only person, firm or corporation, or persons, firms or corporations, that has or have any interest in this proposal or in the contract or contracts proposed to be taken, is or are the undersigned; that this proposal is made without any connection or collusion with any person, firm or corporation making a proposal for the same work; that the attached specifications and form of contract, and the drawings therein referred to, have been carefully examined and are understood; that as careful an examination has been made as is necessary to become informed as to the character and extent of the work required; and that it is proposed and agreed, if the proposal is accepted, to contract with the Charles County Public Schools to do the required work in the manner set forth in the specifications and as shown by the drawings; will be performed and on schedule.

Bidder has proposed bids as indicated in paragraph 6. Bidder is required to bid on Base Bid.

2. The lump sum price on this Proposal Form is to include and cover the furnishing of all materials and labor requisite and proper, and the providing of all necessary machinery, tools, apparatus and means for performing the work, and the doing of all the above-mentioned work, in the manner set forth, described and shown in the specifications. All necessary considerations for time have been accepted.

3. In submitting this bid, Bidder represents having examined copies of all Contract Documents and of the following Addenda:

Addendum No._____ Dated_____ _ Addendum No._____ Dated_____ _

Addendum No._____ Dated_____ _ Addendum No._____ Dated_____ _

Addendum No._____ Dated_____ _ Addendum No._____ Dated_____ _

Contractor accepts responsibility to verify receipt of all addenda. Failure of any bidder to receive any addenda or interpretations shall not relieve the bidder from any obligations under this bid and as amended by all addenda. All addenda so issued shall become a part of the award and contract documents.

004213-R2 - 2 of 8

4. Contract Time: The proposed Work of the project is required to be in place, complete and ready for use no later than Four Hundred Seventy-Five (475) calendar days after the date of the Notice to Proceed.

Contract Time does not assume weather and school delays as schedule is based on calendar days and not weekdays, therefore assuming the rain days can be compensated by weekend days and evenings as required to meet the schedule.

Bidders accept the provisions of the Agreement as to Liquidated Damages in the event of failure to complete the Work on time. Bidder acknowledges that all work must be inspected and approved by Charles County Public Schools and that Liquidated Damages may be assessed twice per the requirements indicated herein.

Tentative Schedule:

April 16 - 30, 2026 Notice to Proceed (NTP) June 19, 2026 - August 14, 2026 ` Substantial Completion (First Summer’s work) June 20, 2027 - August 14, 2027 Substantial Completion (Second Summer’s Work)

September 27, 2027 Final Acceptance (45 day Punch List & Warranty)

5. This Bid does require Bid Security in the amount of five percent (5%) of Base Bid. A letter shall accompany each Bid from the bonding company guaranteeing to issue Payment and Performance Bonds.

6. Bid Values:

Bidder agrees to provide, complete, all systems and components as indicated on the plans and project manual for the complete roof replacement at Mattawoman Middle School. Any materials or services required for the completion of the work indicated, including complete functionality of all utilities, shall be provided. All work to be in accordance with local and state codes as well as the Safety Officer and Energy Manager of Charles County Public Schools. The roof replacement work must be self-preformed. Mechanical Work is critical and shall be fully functional at the end of each period as scheduled.

6.1 BASE BID:

Provide all labor, materials, and equipment, and perform all work required to replace the existing roof with a new 0.80 mil PVC single ply roof membrane and tapered R-30 insulation at Mattawoman Middle School, all in strict accordance with the project drawings, specifications and roofing manufacturer’s requirements for a 30 year NDL warranty. Acknowledging the project requirements DO exceed the base manufacture requirements.

The contractor attests they fully understand the project and the schedule as presented and accept the project scope and schedule.

TOTAL BASE BID OF:

Total Base Bid: ________________________________________________________

______________________________________ Dollars ($ __________________)

004213-R2 - 3 of 8

6.2 ALLOWANCES:

The above stated Lump Sum Bid includes the following listed allowances. Any allowance balance unused at the end of construction shall be remanded back to the Owner. All Allowances exclude general contractor profit, overhead, administration and bond as that value shall be covered in the base contract, see Section 01 21 00 – Allowances.

Allowance A: Owner Coordination (mechanical water testing, Air Balance, Third party Commissioning) $10,000.00

Allowance B: Testing and Inspection- Owners discretion for additional testing $15,000.00

Allowance C: For unforeseen conditions and additional work $50,000.00

Cash Allowances (A to C above) $75,000.00

Additional descriptions and clarifications can be found in Section 01 21 00 Allowances.

6.3 ALTERNATE BIDS:

Special Instructions: Submit a bid on each of the alternates as identified in the bid documents and listed below. Do not enter “No Bid”. If the alternate does not affect your price, enter $0.00 (zero dollars). Indicate whether the price quoted is an addition or a deduct. If no indication is made, the quote will be considered an additive alternate value. Additional descriptions and clarifications can be found in Section 012300 - Alternates.

6.3.1 Bid Alternate #1

Change from Raising RTU’s with new curbs to maintain existing RTU’s with existing curbs. Alternate must include Roof Manufacturer Approval of low flashings (standard and/or liquid) at low RTU locations to maintain Manufacturer’s upgraded details and 30-year NDL warranty. Existing RTU’s may be as low as 3” above roof surface.

(Base Bid: Raise all RTU equipment on new curbs with ALL mechanical, piping, electrical, and controls work as needed to allow continued HVAC function.)

Bid Alternate #1: Deductive Value:

_______________________________________________________ $ ____________ savings.

(Words) (Figures)

004213-R2 - 4 of 8

6.3.2 Bid Alternate #2

Clean and maintain existing galvanized metal roof ladders. Verify existing ladders are secure to structure.

(Base Bid: Provide new aluminum ladders)

Bid Alternate #2: Cost for maintaining existing ladders:

_________________________________________________________ $ ___________ Savings

6.3.3 Bid Alternate #3

Provide cost to re-roof the existing State Modular Classroom Unit as indicated on Owner’s Roof Plan ( Roof Area Portable1). Roof alternate to be complete with all work identified in contract documents and general specifications for 25-year roof with manufacturer’s standard 25-year warranty.

(Base Bid: No work performed on State Modular Classroom Unit)

Bid Alternate #3: Cost for State Modular Classroom Building complete:

_________________________________________________________ $ ___________ Add Costs

6.3.4 Bid Alternate #4

Provide six (6) each 4” roof drains with 50-linear feet (at each drain) with associated elbows, 4” x 6” Y-fitting, cast iron piping, hangers and pipe insulation to augment existing drainage and reduce height of roof insulation at Owner specified RTU equipment. Alternate is for six (6) sets of roof drains – complete.

(Base Bid: Roofing system and drains provided as shown and indicated on bid Plans and project manual).

Bid Alternate #4: Cost for 6 each roof drain systems complete:

6.3.5 Bid Alternate #5

Provide and certify a new aluminum lighting protections system at all roof areas with copper grounds. Includes roof protection pads every 3-feet under cables and clamps. Includes powder coated conduits for protection.

(Base Bid: No lightning protection provided or installed).

Bid Alternate #2: Cost for 6 each roof drain systems complete:

004213-R2 - 5 of 8

6.4 UNIT PRICES

Unit Prices listed below are further identified in Section 012200-R – Unit Prices. Unit Price are listed here for inclusion into the Bid. Base bid values INCLUDE ALL extended values complete (i.e.: $/SF x 5,000 SF, etc.)

6.4.1 LIST OF UNIT PRICES

A. For scraping and priming of more/less surface rusted areas of existing steel deck and framing than the five thousand (5,000) square feet carried in the Base Bid as outlined in Division 05 Section “Steel Decking”.

Value per square foot (SF)of scraping & Painting of existing metal deck: ___________________ ( $ ____ / SF)

B. For removal and replacement of more/less steel deck than the one thousand (1,000) square feet carried in the Base Bid as outlined in Division 05 Section “Steel Decking.”

Value per square foot (SF) of metal deck replacement: __________________________ ( $ ____ / SF)

C. For the replacement of more or less plywood roof deck than the one thousand (1,000) square feet carried in the Base Bid as outlined in Division 06 Section “Rough Carpentry.”

Value per square foot (SF) of plywood roof deck replacement: __________________________ ( $ ____ / SF)

D. For the installation of more/less walkway pad than the two thousand five hundred (2,200) linear feet carried in the Base Bid, as outlined in Division 07 Section 075420 - “Thermoplastic Roofing.”

Value per linear foot (LF) of Roof Walkway Pad: __________________________ ( $ ____ / LF)

7. In submitting this proposal, it is understood that the right is reserved by the Owner, Charles County

Public Schools, to reject any and all Bids and to accept whichever Bid is deemed to be in their best interest. Further the right to negotiate with the apparent low bidder or low bidders to achieve the most beneficial contract price, completion schedule and Scope of Work. The Owner anticipates the award of Base Bid, with or without Bid Alternate values as desired and in a combination which best suits the Owner's project for the funds available; this criteria may be used to determine the apparent low bidder as well.

8. Accompanying this Proposal is a duly notarized letter from ____________________________ (Surety

Company) agreeing to bond the Contractor in accordance with the Bid Documents if the Bidder is awarded the contract and certifying that the Surety Company is licensed to do business in Maryland.

004213-R2 - 6 of 8

9. The final terms and General Conditions of the Construction Contract shall be based on the Charles

County Board of Education standard General Conditions of the Construction Contract (00 72 10).

10. The undersigned Bidder affirms that he does not discriminate with respect to individual political affiliation, religious belief, race, creed, national origin, sex, age, or handicap in employment practices.

11. The following documents are attached to and made a condition of this bid:

(a) Required Bid Security (5% - Bond, check )

(b) Letter from Bonding Company

(c) Affidavit signed and notarized.

(d) Minority Business Enterprise (MBE) Participation Forms ( Parts 2, 3 & 4).

12. Contractor accepts responsibility to verify receipt of all addenda. Failure of any bidder to receive any addenda or interpretations shall not relieve the bidder from any obligations under this bid and as amended by all addenda. All addenda so issued shall become a part of the award and contract documents.

12. The bidder shall submit with its bid or proposal a completed Certified MBE Utilization and Fair

Solicitation Affidavit & MBE Participation Schedule- Part 2 and MBE Participation Schedules – Part 3 AND Signature Page - Part 4 for each project that identifies the bidder’s specific commitment of certified minority business and certifies it made a good faith effort to achieve the goal established in the solicitation. The MBE Participation Schedules shall include the name of each certified MBE that will participate in the project including its respective MBE classification, and shall include the items of work to be performed or furnished and the committed price or the percentage of the contract to be paid to each MBE for the work or supply. When the contract goal of 18 percent and/or its subcontracting goals cannot be met, the bidder or offeror shall submit with its bid the Certified MBE Utilization and Fair solicitation Affidavit, and the MBE Participation Schedule (indicating partial or no participation). Failure to submit will result in the bid being determined as non-responsive. NOTE: Bidder or Offerer shall be responsible for determination all MBE Form Requirements – See Section 00 67 00 for more MBE requirements and form directions.

13. The undersigned Bidder affirms that he has included all required allowances in his bid price.

14. The undersigned Bidder affirms that he has included ALL required Unit Price ( See Section 012200R – Unit

Prices) values and quantities in the Base Bid.

15. The Bidder agrees to hold all value for a period of 90-days.

004213-R2 - 7 of 8

16. Work Hours and Intended Schedule

Intended Schedule

April 16 - 30, 2026 Notice to Proceed (NTP) – Submittal Period

First Summer (2026) June 19, 2026 - August 14, 2026 ̀ Substantial Completion (First Summer’s work)

Second Summer (2027) June 20, 2027 - August 14, 2027 Substantial Completion (Second Summer’s Work)

September 27, 2027 Final Acceptance (45 day Punch List & Warranty)

Work Hours: Work hours shall be scheduled to avoid any disturbances to students and student studies;

therefore, the contract work hours shall be:

Monday to Friday # 6:00 AM to 3:00 PM June 19 to August 14, 2026 Monday to Friday # 6:00 AM to 3:00 PM June 20 to August 14, 2027 Saturday – Sunday 6:00 AM to 3:00 PM As Requested School holidays (no students) * 6:00 AM to 3:00 PM

Punch List Period: (August 15, 2027 – September 27, 2027) Monday to Friday # 3:30 PM to 10:00 PM

* Based on Calendar published by Charles County Public Schools # Unless otherwise scheduled with Owner.

004213-R2 - 8 of 8

The contractor attests they fully understand the project and the schedule as presented and accept the project scope and schedule.

PLEASE SIGN IN ONLY ONE OF THE APPROPRIATE SPACES PROVIDED BELOW AND COMPLETE ALL THE INFORMATION REQUESTED:

(a) If a Corporation:

(Officer's Signature) (Date)

(Printed Name) (Title)

(Name of Corporation)

(State of Incorporation)

Business Address: _______________

Phone Number: _________________

FAX Number: ___________________

(b) If an Individual Doing Business:

(Individual's Signature) (Date)

Trading As:

(Name of Business)

(c) If a Partnership:

(Partner's Signature) (Date)

Co-Partners Trading As:

(Name of Partnership)

Corporate Seal:

DATE: _______________________________

FIRM NAME

LIGHTNING PROTECTION FOR STRUCTURES 264113 - 1 of 4

SECTION 264113

LIGHTNING PROTECTION FOR STRUCTURES

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes lightning protection system for the following:

1. Ordinary structures (Schools)

2. Mattawoman Middle School is an existing 2-story school, no current lightning protection system.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings:

1. Include layouts of the lightning protection system, with details of the components to be used in the installation.

2. Include raceway locations needed for the installation of conductors.

3. Details of air terminals, ground rods, ground rings, conductor supports, splices, and terminations, including concealment requirements.

4. Calculations required by NFPA 780 for bonding of metal bodies.

1.3 INFORMATIONAL SUBMITTALS

A. Coordination Drawings: Lightning protection system Shop Drawings, drawn to scale, coordinated with each other, using input from installers of the items involved:

B. Qualification Data: For Installer.

C. Product certificates.

D. Field quality-control reports.

E. Color chart for Ground Cable protection conduits- powder coat color.

1.4 CLOSEOUT SUBMITTALS

A. Maintenance data.

B. Completion Certificate:

1. UL Master Label Certificate.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: LPI Master Installer.

LIGHTNING PROTECTION FOR STRUCTURES 264113 - 2 of 4

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Dillon Lightning Protection Systems, Frederick, MD 301-696-9027

2. Harger Lightning & Grounding.

3. Heary Bros. Lightning Protection Co. Inc.

4. Independent Protection Co.

5. Larson Lightning Protection, Inc.

6. National Lightning Protection.

7. Preferred Lightning Protection.

8. Robbins Lightning, Inc.

2.2

PERFORMANCE REQUIREMENTS

A. NFPA Lightning Protection Standard: Comply with NFPA 780 requirements for school buildings.

B. UL Lightning Protection Standard: Comply with UL 96A requirements for school buildings.

C. Lightning Protection Components, Devices, and Accessories: Listed and labeled by a qualified testing agency as complying with UL 96, and marked for intended location and application.

2.3

MATERIALS

A. Air Terminals:

1. Copper unless otherwise indicated.

2. 24 inches (610 mm) long.

3. Rounded tip. (Blunt)

4. Threaded base support.

B. Class 1 Main Conductors:

1. Stranded Copper: 29-strands of 17 gauge basket weaver copper, 59,450 circular mils of conductivity-minimum, C. Secondary Conductors:

1. Stranded Copper: 26,240 circular mils of conductivity.

2. Stranded Aluminum: 24 strands of 14 gage minimum (98,640 circular mils) of basket weave cable.

D. Ground Loop Conductor: Stranded copper.

E. Ground Rods:

1. Material: Solid copper.

2. Diameter: 3/4 inch (19 mm).

3. Rods shall be not less than 120 inches (3050 mm) long..

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LIGHTNING PROTECTION FOR STRUCTURES 264113 - 3 of 4

F. Fastening / Anchorage

1. Adhesives for adhering to the roof system shall be secured through the roof contractor or roof manufacturer supplier for compatibility.

2. Conduits (EMT or Rigid): Conduits 10-feet in length shall be provided to protect ground conductors from damage or theft. Conduits to be powder coated gray or other approved color to blend with building exterior. Conduit metal straps shall be provided in matching color.

G. Miscellaneous

3. Tripod Brace for open areas – to maintain protection in open areas. (Desired for open areas such that air terminals are elevated for safety purposes.)

4. Fittings designed specifically for application including Bimetallic clamps, Tee Splices, Clamps and similar devices

5. Adhesive for installation to be obtained

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install lightning protection components and systems according to UL 96A and NFPA 780.

B. Install conductors with direct paths from air terminals to ground connections. Avoid bends less than 90 degrees and 8 inches (203 mm) in radius and narrow loops.

C. Conceal conductors within normal view from exterior locations at grade within 200 feet (60 m) of building. Comply with requirements for concealed installations in UL 96A and concealed systems in NFPA 780. Coordinate with Owner., D. Ground Ring Electrode: The conductor shall be not less than the main-size lightning conductor.

3.2 CONNECTIONS

A. Aboveground concealed connections, and connections in earth or concrete, shall be done by exothermic welds or by high-compression fittings listed for the purpose.

B. Aboveground exposed connections shall be done using the following types of connectors, listed and labeled for the purpose: exothermic weld.

C. Bonding Straps and Jumpers: Install in locations accessible for inspection and maintenance, except where routed through short lengths of conduit.

1. Bonding to Structure: Bond straps directly to basic structure, taking care not to penetrate any adjacent parts.

2. Bonding to Equipment Mounted on Vibration Isolation Hangers and Supports: Install bonding so vibration is not transmitted to rigidly mounted equipment.

LIGHTNING PROTECTION FOR STRUCTURES 264113 - 4 of 4

3.3 PROTECTIONS

A. All roof to ground cabling shall be sleeved through electrical conduit for protection from theft and lawn care equipment. Conduit protection shall extend from grade to 10-feet above grade. Conduits shall be powder coated in a gray color, as selected, to blend with the building.

B. Roof-to-Grade conduits shall have a minimum of 4 color matching heavy duty straps (clamps).Provide a minimum of 6 heavy duty straps, in an alternating spacing.

C. Protect roof with 4” square PVC patches wherever a cable anchor ( stamped clamp, bimetallic clamp, clamp or similar device would otherwise be in contact with the roof membrane. Expect a device every 3-feet for general coordination. (coordinate final lightning engineering plans with roofer).

3.4 FIELD QUALITY CONTROL

A. Special Inspections: Engage a qualified special inspector to perform the following special inspections:

1. Perform inspections as required to obtain a UL Master Label for system.

B. Prepare test and inspection reports and certificates.

C. Notify Architect at least 48 hours in advance of in section before concealing lightning protection components.

END OF SECTION