Technical_Specifications_-_Addendum_2_08.26.2025.pdf

CVG Centre Roof Replacement Addenda 1 Items indicated in RED.

Design build roof Replacement Project in an occupied public building. The (4) existing roof type to be replaced are:

1. Modified Bituminous Membrane Roof on 3 ½” insulation max. Roof insulation on 1” metal deck on radiused steel structure.

2. Ballasted single ply membrane roof on tapered insulation on 3 ½” insulation max. Roof insulation on 5 ¼” concrete floor slab.

3. Ballasted single ply membrane roof on tapered insulation on 3 ½” insulation max. Roof insulation on 1 ½” metal deck on steel structure.

4. Modified bituminous membrane roof on 1” insulation. Roof insulation on 1” metal Deck on radiused steel structure.

5. The existing 1 ½” Prefinished Profiled Metal Roof covered walking system to remain. (No Work).

The intent is to award the project to a Prime Roofing Contractor, who will serve as the single point of responsibility for all work elements, including roofing replacement, fall protection installation as requested, and lightning protection restoration/extension.

Technical Specifications:

The following documents are attached:

1. Original Building Plans

2. Photo Binder of existing building

3. September 30, 2024, Building Roof Assessment

4. Fall Protection assessment report.

5. Technical Specifications:

a. Includes LJB Engineer Fall Protection Design Scope

2.

Addenda #1 Items:

1. Added Scope:

a. Existing Conditions: Remove existing satellite dish and supports from DHL Tower Roof. Existing weather head to remain and be properly protected. (Photo added to photo binder).

b. Site Restoration:

i. Remove all barricades and debris from paved and non-paved areas.

ii. Clean up all laydown areas and restore them to original conditions.

iii. Sweep up all debris and wash all disturbed paved areas to existing conditions.

iv. Non-paved areas and lawn areas to be restored to existing conditions.

Including but not limiting to fill ruts, replace disturbed soils, provide smooth substrate, seed per airport specifications, (no loose straw).

New Roof Recommendations

• EPDM Roofs: (Include Total SF per location) o Remove the ballast and dispose.

o Remove the existing EPDM membrane and flashings.

o Replace any wet damaged or deteriorated insulation on unit costs ($/SF/Inch) o Install a ½” densdeck or similar product, mechanically fastened into the existing structural deck.

o Install a 60 mil EPDM, adhered to by manufacturer recommendations.

Alternate: (2 ply modified bitumen assembly adhered)

• Modified Roofs:

o Remove down to the structural decking.

o Install new polyisocyanurate insulation to meet an R value of 30.

o Install a ½” gypsum coverboard, mechanically fastened into structural deck. (At concrete deck locations, all layers of insulation to be adhered.)

o Install all new outside edge metal as required.

o Add additional wood blocking as needed to meet the new insulation thickness.

o Install 2-ply modified bitumen, adhered per manufacturer’s recommendation.

• General o Add additional wood blocking to as needed to meet new insulation heights.

o Install new metal copings to meet ES-1 requirements.

Metal must be included in manufacturer’s warranty.

o Roof Installation to meet wind uplift pressures complying with i.e., ASCE - 7 requirements.

c. Install a new two ply modified bitumen assembly, adhered to manufacturer’s specifications. The document mentioned Siplast and Soprema only as manufacturers of recent roof systems at CVG. CVG is open to all manufacturers, not limited.

3.

• Unit Prices:

o Drain replacement – per each.

o Wood blocking – per board foot per inch.

o Wet insulation replacement – per square foot per inch.

• Roof Warranty: 20 yr. No Dollar Limit Full System Warranty

2500 Newmark Drive Miamisburg, OH 45342 | (866) 552-3536 | LJBinc.com

Summary of Anticipated Installation CVG Centre Façade Access and Roof Fall Protection Improvements

LJB Project number: 0131473A.00

Date: August 13, 2025 (REVISED AUGUST 22, 2025)

Client name: CVG Airport

Project manager: Dan Buck

The summary below includes solutions for the installation of what is anticipated to be completed as part of the CVG Centre façade access and roof fall protection improvement project. Any CA work associated with the installation is to be completed by LJB. The layout on the following page provides an illustration of the anticipated solutions to be installed on each roof. Note that structural reinforcement is not shown on the layout but is expected to include the addition of new beams to the existing roof structure where applicable.

Roof Area Anticipated Solutions

Concave Roof Roof markings, Ladder, hatch guardrail, additional façade access anchor points, façade access system structural reinforcement

Convex Roof Roof markings, Ladder, hatch guardrail, additional façade access anchor points, façade access system structural reinforcement

Elevator Roof Roof guardrail, ladder, hatch guardrail

Main Roof North Roof guardrail, roof markings

Main Roof South Roof guardrail, roof markings, ladder, hatch guardrail, façade access system addition, façade access system structural reinforcement

Low Roof North Roof guardrail, roof markings, roof access stair

Low Roof South Roof guardrail

Canopy Roof Roof-mounted horizontal fall protection system

Addenda 1 - Added Doc.

2500 Newmark Drive Miamisburg, OH 45342 | (866) 552-3536 | LJBinc.com

Addenda 1 - Updated Doc

CVG Centre Roof Areas The scope of this project includes the areas and proposed solutions described for the individual areas below.

Concave Roof

− Façade access davits are not certifiable in current state due to unknown connections, inadequate support structure, incomplete coverage, missing documentation.

» Proposed solution: Evaluate existing stanchions and connections, design structural reinforcement, design new stanchions where needed.

− Roof hazards include unprotected roof edge, non-compliant access ladder/hatch.

» Proposed solutions: Roof delineation line, modify existing ladder and add hatch guardrail.

Convex Roof

− Façade access davits are not certifiable in current state due to unknown connections, inadequate support structure, incomplete coverage, missing documentation.

» Proposed solution: Evaluate existing stanchions and connections, design structural reinforcement, design new stanchions where needed.

− Roof hazards include unprotected roof edge, non-compliant access ladder/hatch, unprotected hole (skylight).

» Proposed solutions: Roof delineation line, skylight guarding, modify existing ladder and add hatch guardrail.

Elevator Roof

− Roof hazards include unprotected roof edge, non-compliant access ladder/hatch.

» Proposed solutions: Roof guardrail, add ladder and add hatch guardrail.

Main Roof North

− Roof hazards include unprotected roof edge, non-compliant access ladder/hatch, » Proposed solutions: Roof delineation line, roof guardrail.

Main Roof South

− Roof hazards include unprotected roof edge.

» Proposed solutions: Roof delineation line, roof guardrail, modify existing ladder and add hatch guardrail.

Low Roof North

− Roof hazards include unprotected roof edge, non-compliant guardrail and access point.

» Proposed solutions: Roof delineation line, roof guardrail, access stair.

Low Roof South

− Roof hazards include unprotected roof edge, and non-compliant guardrail.

» Proposed solutions: Roof delineation line, roof guardrail.

Canopy Roof

− Roof hazards include unprotected roof edge, no permanent method of access.

» Proposed solutions: Roof fall protection system, access procedures.

The proposed solutions are based on a site walk that occurred on August 5, 2025. We expect minor modifications to the solutions based on more detailed field observations and information obtained from the original building design drawings. Any major deviations from the layout may result in additional scope of work or a change-order.

By abating this list of fall hazards identified in the fall hazard risk assessment, CVG will be greatly reducing the roof fall hazard risk at CVG Centre.

Scope of Work – Design Services The scope of work during the design process will include the following professional safety engineering design services:

Review available reference drawings for these areas.

− LJB will review the existing building drawings obtained to date and will request any additional drawing information that is needed.

Complete site investigation

− Perform the field work necessary to design the fall protection solutions.

Conduct analysis of existing façade access stanchions. LJB will require roofing be cut away to see stanchion connections at multiple locations before design can take place.

Load testing may be needed depending on structural connection type.

− In the event that the stanchions themselves are not adequate, LJB will design a replacement system to provide the required façade access coverage.

Complete the abatement design.

− Finalize the layout and details for the planned method to achieve compliance with current OSHA regulations (effective January 2017).

− Complete the structural engineering design for the fall protection and façade access solutions.

Perform a structural analysis for the components supporting these abatement elements to determine if any overstress occurs as a result of the new work.

Develop construction documents with PE stamp for the state of Kentucky.

− The drawings will contain sufficient information to produce shop drawings for the fabrication and installation of the new fall protection systems where applicable.

− Where appropriate, such as with a standard swing gate, manufactured items will be denoted with a specific product.

− Where roof penetrations are required, LJB will provide a flashing detail for repairing these penetrations to maintain existing roof warranties.

− The drawings will not show detailed information regarding the existing conditions in the area.

− LJB will provide a cost estimate for the installation of the complete design.

Conduct review meeting with CVG personnel.

− Design comments will be discussed in this meeting.

− Updated construction documents will be provided based on the comments discussed, if necessary.

The start of the project will include a design kickoff meeting with CVG and LJB representatives. Additionally, LJB will participate in scheduled design meetings with CVG throughout the design process.

Scope of Work – Construction Period Services

Construction period services are important to ensure the installation is in conformance with the design documents. It provides the commissioning, also sometimes referred to as certification, that the project is completed, and the fall hazards are abated as planned.

This scope will include the following professional safety engineering services for CVG Centre.

Attend pre-construction meeting for the project.

− LJB engineer familiar with design documents will participate in the pre-construction meeting.

− Review design documents with the selected contractor.

− Discuss any existing conditions the contractor has observed that may impact the proposed abatement installations.

− Address any questions related to the design documents.

Perform submittal reviews.

− Contractor to submit fabrication drawings and product layout drawings with specifications.

− LJB will review for conformance with the design documents and provide a response in a timely manner.

− LJB will evaluate proposed alternatives that provide equivalent protection for conformance with the design intent.

Provide written responses to contractor Request for Information (RFIs) and other questions as they arise.

− Contractor to submit RFIs to LJB for review and to receive a written response.

− As needed, LJB will coordinate discussions to address any questions or concerns.

On-site review to verify the installation conforms with the design documents.

− Based on both phases being installed by a contractor as one project, we have included three (3) site visits at various stages of completion including a final punch list on the last visit. Additional site visits may result in a change-order.

− Where there are connections that require penetration in the building envelop, LJB may conduct an on-site review prior to the work being covered by roofing, flashing or other materials.

Prepare a commissioning record

− To document that the fall hazard risks have been abated in accordance with design intent, LJB will provide a certification and commissioning record for the installation.

For any active fall protection systems, this record will serve as the certification documentation and document the design, fabrication, installation, and use of the systems.

− The record will include:

» Brief summary report providing an overview of the project and results

» List of any outstanding non-compliant items and the plan to resolve them

» Description of the owner’s project requirements

» Basis of design

» As-built design documents

» Fall protection product submittals

» Test procedures with results (if applicable)

» Issues log

» Records from on-site visits and meetings

» Use and rescue procedures and training documentation

Fee & Schedule Based on the outlined scope of work, LJB proposes to provide these professional safety services for the fee outlined in the table below, including expenses.

LINE ITEM FEE

Engineering Analysis/Design of façade access and fall protection solutions on CVG Centre

Construction Period Services (cost estimates, submittal reviews, inspections, commissioning/certification)

Total

We can schedule the outlined design services in four to six weeks once written authorization to proceed is given. Any additional design services requested will result in a change-order. We look forward to working with you on the successful completion of this project. If you have any questions, please feel free to contact me at (937) 259-5073 or via email at DBuck@LJBinc.com.

Sincerely, LJB Inc.

Dan Buck, P.E.

Project Manager