23_1018 Addendum No. 02_Jester Park Addition.pdf

OCTOBER 18, 2023

Jester Park Nature Center Addition ADDENDUM NO. 2

ADDENDUM NO. 2

To Contract Documents for:

JESTER PARK NATURE CENTER ADDITION

MA Architecture Project No. 061.23

DATE: OCTOBER 18, 2023

ARCHITECT:

MA ARCHITECTURE

1201 Keosauqua Way, Ste 101 Des Moines, IA 50309 515.554.3564 Contact: Jessica Terrill, AIA jessica@architecturema.com

MEP ENGINEERS :

KCL ENGINEERING

300 4TH St.

West Des Moines, IA 50265 515.724.7938 Contact : Andy Versluys aversluys@kclengineering.com

This addendum is issued to modify, clarify, or amend the original Drawings and is hereby made part of the Contract Documents dated September 20th, 2023. The Contractor shall be responsible for incorporating items in this Addendum to the Work. Attach this addendum to the Project Manual(s) in your possession. Acknowledge receipt of this Addendum by number where indicated on the Bid Form. Failure to do so may subject Bidder to disqualification. The following shall take precedence over anything to the contrary in the Project Manual, in the Drawings, or in prior Addenda.

This Addendum consists of 3 pages and 1 attachment.

GENERAL INFORMATION / CLARIFICATIONS

1. The completion date for the project shall be July 15, 2024. No allowances for winter conditions will be established.

2. Q. Who is responsible for the Building Permit. If it is the GC, how do we determine the cost?

A. The general contractor is responsible for building permits. Development services does not charge Polk County Conservation for permits.

3. Q. Who is responsible for the Special Inspections?

A. Polk County Conservation

4. Q. It appears there is no new hollow core. Is that correct?

A. Hollow core is an existing material, there is no new hollow core on this project.

5. Q. Please clarify specification section 01 00 00 1.06 Contractors Design-related

Professional Design Services.

A. Additional engineering is required specific to a supplier’s product. Contractor is responsible for engineering design services for Structural Insulated Panels. See Design

Criteria on sheet S00.01, General Note G9 on sheet S00.01, notes on Detail B1 and

B3/S05.01, and specification section 06 12 00 (attached to this addendum).

6. Q. Are there liquidated damages and is that negotiable?

A. Liquidated damages will be a part of the contract and are not negotiable. However, the project completion date has been extended.

7. Q. First floor exiting must be maintained. Will this require scaffolding?

A. Yes, protect the west exit with scaffolding.

8. Q. Is a hard wall or poly-wall construction preferred to separate construction zone from the

Great Hall?

A. If a partition is necessary, the owner prefers hard wall partition.

9. Q. Who is the installer of the existing solar panels?

A. Red Lion Solar

SUBSTITUTION REQUESTS

1. Substitution Request: Section 07 27 00 Air Barriers

A. Soprema Sopraseal Stick VP – APPROVED

2. Substitution Request: Structural Drawings – SIPS Panels

A. Enercept Structural Insulated Panel System - APPROVED

3. Substitution Request: Section 10 28 00 Toilet, Bath & Laundry Accessories

A. Koala Care KB3000-AHL Adult Changing Station - APPROVED

CHANGES TO THE DRAWINGS

Architectural drawings

1. A5.02 – DETAILS, DRAWINGS A12, F5, E12, H12

A. REVISE Note to read “NEW COMPOSITE SHEATHING TO MATCH EXISTING COMPOSITE

SHEATHING COMPOSITE NAIL BASE INSULATED SHEATHING”

2. A7.01 – WINDOW & DOOR SCHEDULES & LEGENDS, WALL TYPES, FINISH PLAN , WALL

LEGEND – TYPE E1B

A. REVISE Note to read “06 20 13 06 20 00 VENTILATION MAT” B. REVISE Note to read “06 12 00 06 16 00 COMPOSITE NAIL BASE INSULATED SHEATHING”

CHANGES TO THE SPECIFICATIONS

Architectural Specifications

1. SECTION 16 12 00 – STRUCTURAL INSULATED PANELS

A. ADD section in its entirety.

2. SECTION 06 16 00 – SHEATHING

1. DELETE paragraph 2.02 A. Wall Sheathing: Glass Mat faced gypsum with integral water-resistive and air barrier in its entirety.

2. ADD paragraph 2.02 B. to read as follows:

“B. Wall Sheathing: Polyisocyanurate (ISO) thermal board insulation with Classification indicated, in compliance with ASTM C1289.

1. Overall Panel Thickness: 1-5/8 inches.

2. Plywood Thickness: 5/8 inch (nominal).

3. Classifications:

a. Type V: Faced with oriented strand board (OSB) or plywood on one major surface of core foam and glass fiber reinforced cellulosic felt or uncoated or coated polymer-bonded glass fiber mat facer on other major surface of core foam.

1) Compressive Strength: 16 psi, minimum.

2) Thermal Resistance, R-value: Not less than 6.6, ASTM C518 at 75 degrees F.

4. Products:

a. Hunter Panels; Xci Ply: www.hunterpanels.com/#sle.

b. Substitutions: See Section 01 60 00 - Product Requirements.”

3. DELETE paragraph 2.01 B in its entirety.

4. DELETE paragraph 3.02 A. in its entirety.

5. ADD paragraph 3.02 B to read as follows:

“B. Wall Sheathing: Secure with long dimension perpendicular to wall studs, with ends over firm bearing and staggered, using screws.”

6. DELETE paragraph 3.04 in its entirety.

3. SECTION 10 14 00 – SIGNAGE

A. DELETE section in its entirety.

B. Signage has been removed from scope.

ATTACHMENTS

1. SPECIFICATION SECTION 16 12 00 – STRUCTURAL INSULATED PANELS (6 pages)

END OF ADDENDUM 02

STRUCTURAL INSULATED PANELS

06 12 00 - 1

SECTION 06 12 00- STRUCTURAL INSULATED PANELS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Structural Insulated Panels (SIPs).

B. Related Sections: Section(s) related to this section include

1. Section 06 10 00 Rough Carpentry

2. Section 06 09 00 Wood and Plastics Fastenings

1.2 SYSTEM DESCRIPTION

A. Structural Insulated Panels (SIPs) consist of oriented strand board (OSB) laminated with structural adhesives to a termite resistant EPS insulation core, a EPA registered treatment for mold, mildew, and termites, and SIP Manufacturer supplied connecting splines, sealants, and SIP screws.

1.3 REFERENCES

A. ACSE 7 - Minimum Loads for Buildings and other Structures.

B. ASTM C578 – Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation.

C. DOC PS2 – Performance Standard for Wood-based Structural-Use Panels.

D. ICC ES AC04 – Acceptance Criteria for Sandwich Panels.

E. ICC ES AC05 – Acceptance Criteria for Sandwich Panel Adhesives.

F. ICC ES AC12 – Acceptance Criteria for Foam Plastic Insulation.

G. ICC ES AC239 – Acceptance Criteria for Termite-Resistant Foam Plastics.

H. AWPA E1 - Standard Method for Laboratory Evaluation to Determine Resistance to Subterranean Termites.

I. AWPA E12- Standard Method of Determining Corrosion of Metal in Contact with Treated Wood.

J. ASTM D3273 - Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber.

K. EPA - Registered products listing.

06 12 00 - 2

1.4 DESIGN REQUIREMENTS

A. Provide SIPs which have been manufactured, fabricated and installed to withstand loads indicated and to maintain performance criteria stated by SIP manufacturer without defects, damage or failure.

1.5 SUBMITTALS

A. Product Data: Submit product data for specified products.

1. SIP Code Compliance: Provide ICC ES code report for SIP with evidence of compliance with code requirements as an alternate method of construction. Submit current compliance report number from ICC ES showing conformance to the International Building Code (IBC) and International Residential Code (IRC). Code report shall include compliance with ICC ES AC04 (Sandwich Panels) dated May 2006.

2. EPS Code Compliance: Provide ICC ES code report for EPS foam with evidence of compliance with code. Submit current compliance report numbers from ICC ES with conformance to the International Building Code (IBC) and International Residential Code (IRC). Code report shall include compliance with ICC ES AC12 (Foam Plastic) dated June 2006 and ICC ES AC239 (Termite-Resistance) dated June 2008.

3. Manufacturer’s Instructions: SIP Manufacturer’s Construction Manual and load design charts.

B. Calculations: Provide structural calculations by a registered architect or professional engineer in the state of Iowa qualified to perform such work.

C. Shop Drawings: Submit shop drawings for SIPs showing layout, elevations, product components and accessories.

D. Quality Assurance Submittals: Submit the following:

1. Certificate: Product certificate showing compliance to Third Party Quality Control program of PFS Corp.

E. Warranty: Warranty documents specified herein.

1.6 QUALITY ASSURANCE

A. Installer Qualifications: Installer should be experienced in performing work of this section and should have specialized in installation of work similar to that required for this project.

B. Source Limitations: Obtain all SIPs through one source. All accessories to be as furnished or recommended by the SIP manufacturer.

1.7 REGULATORY REQUIREMENTS:

A. SIPs shall be recognized for compliance with International Building Code in a current ICC ES evaluation report

B. Pre-installation Meeting: Conduct pre-installation meeting to verify project requirements, foundation/structural system/substrate conditions, SIP manufacturer installation instructions and SIP manufacturer warranty requirements. Comply with Division 1 Project Management and Coordination (Project Meetings) Section.

06 12 00 - 3

1.8 DELIVERY, STORAGE & HANDLING

A. Ordering: Comply with SIP manufacturer ordering instructions and lead time requirements to avoid construction delays.

B. Delivery: Deliver materials from SIP manufacturer with identification labels or markings intact.

C. Off-load SIPs from truck and handle using fork lift or other means to prevent damage to SIPs.

D. SIPs shall be fully supported in storage and prevented from contact with the ground. Stack SIPs on pallets or a minimum of three stickers for every 8 feet of SIP length.

E. SIPs shall be fully protected from weather. Protect against exposure to rain, water, dirt, mud, and other residue that may affect SIP performance. Cover stored SIPs with breathable protective wraps. SIPs shall be stored in a protected area.

1.9 WARRANTY

A. Project Warranty: Refer to Conditions of the Contract for project warranty provisions.

B. Manufacturer’s Warranty: Submit SIP manufacturer’s standard warranty document. SIP Manufacturer warranty is in addition to, and not a limitation of, other rights Owner may have under Contract Documents.

C. Warranty Period: 20 years commencing on Date of Substantial Completion.

PART 2 - PRODUCTS

2.1 MATERIALS

A. SIPs consisting of the following:

1. UL certified EPS core with Perform Guard treatment, minimum of 0.95 pcf (15.2 kg/m3) complying with ASTM C578 Type I and having ICC ES recognition of termite resistance.

Insulation manufacturer shall provide Third Party UL certificate. ICC ES report shall be provided for recognition of termite resistance in compliance with ICC AC239.

2. OSB identified with APA or TECO performance mark with Exposure I durability rating and performance in accordance with DOC PS-2 span rating 24/16 or greater.

3. Adhesives shall be in conformance with ICC ES AC05 – Acceptance Criteria for Sandwich Panel Adhesives

2.2 ACCESSORIES

A. Splines: OSB, block splines, or I-beam for use in joining SIPs shall be supplied by SIPs manufacturer.

B. Fasteners: corrosion resistant SIP screws compatible with SIP system shall be provided by the SIPs manufacturer.

1. Wood Screws for attachment to wood members

2. Heavy Duty Metal Screws for attachment to metal members (16 gauge to 3/16”)

3. Light Duty Metal Screws for attachment to metal decks (18 gauge or thinner)

06 12 00 - 4

C. SIP Sealant: Shall be specifically designed for use with SIPs. Sealant must be compatible with all components of the SIP. Sealant shall be provided by the SIP manufacturer.

D. Dimensional Lumber: SPF, #2 or better, or engineered equivalent unless otherwise required by structural drawings.

E. Vapor Barrier SIP Tape: 40 mil thick, butyl adhesive suitable for indoor use, min. 6 inch wide for use on SIP joints as specified by designer. SIP Tape shall be supplied by the SIP manufacturer.

2.3 FABRICATION

A. Sizes: SIPs shall be fabricated in accordance with approved Shop Drawings

B. Thermal Resistance, R-value

1. 10 1/4” (210 mm) thick SIP with R-value of 29 at 75oF (32 at 40oF)

2.4 PRODUCT SUBSTITUTIONS

A. Substitutions: No substitutions permitted without fourteen day (14) prior approval.

2.5 RELATED MATERIALS

A. Related Materials: Refer to other sections for related materials as follows:

1. Dimensional Lumber: SPF #2 or better or pre-engineered equivalent: Refer to Division 6

Carpentry Sections.

2.6 SOURCE QUALITY

A. Source Quality Assurance: Each SIP component required shall be supplied by SIP manufacturer and shall be obtained from selected SIP manufacturer or its approved supplier.

1. Each SIP shall be labeled indicating PFS Third Party certification.

2. Provide evidence of UL Third Party inspection and labeling of all insulation used in manufacture of SIPs.

3. SIP manufacturer shall provide Lamination, R-Value and mold/mildew/termite resistance warranty documents for building owner acceptance. Manufacturer standard forms will be submitted.

4. Provide SIPs with Foam-Control EPS with Perform Guard for termite resistance.

Treatment shall be EPA registered with treatment efficacy substantiated by ICC ES report.

5. Dimensional Tolerance - shall comply with values listed in the manufacturer’s Quality Control Manual.

B. Source Quality: Obtain SIPs from a single manufacturer.

06 12 00 - 5

PART 3 - EXECUTION

3.1 MANUFACTURER’S INSTRUCTIONS

A. Compliance: Comply with manufacturer’s ICC ES report, Load Design Charts, Construction Manual, Shop Drawings, and product data, including product technical bulletins, for installation.

B. Plans shall be reviewed by a qualified architect/engineer and shall be signed and/or sealed.

Deviations from standard detail and load design values shall be calculated and signed and/or sealed by a qualified architect/engineer.

3.2 EXAMINATION

A. Site Verification of Conditions: Verify substrate conditions (which have been previously installed under other sections) are acceptable for product installation in accordance with manufacturer’s instructions.

1. Verify conditions of foundation/structural system/substrate and other conditions which affect installation of SIPs. Any adverse conditions shall be reported in writing. Do not proceed with installation until adverse conditions are corrected.

3.3 INSTALLATION

A. SIP Installation:

1. SIP Supports: Provide level and square foundation/structural system/substrate that support wall and/or roof SIPs. For wall SIPs, hold sill plate back from edge of rim board 7/16" (11 mm) to allow full bearing of OSB skins. Provide 1 1/2" (38 mm) diameter access holes in plating to align with electrical wire chases in SIPs. Provide adequate bracing of SIPs during erection. Remove debris from plate area prior to SIP placement.

2. SIP Fastening: Connect SIPs by nails or staples as shown on drawings. Screws of equal strength may be substituted for nails and staples as specified by engineer. SIP sealant must be used together with each fastening techniques. Where SIP Screw Fasteners are used, provide a minimum of 1" (25.4 mm) penetration into support. Join SIPs using plates and splines. Secure attachment with nails, staples, or screws, and SIP sealant. Apply SIP sealant following SIP manufacturer recommendations.

3. SIP Tape: Provide SIP Tape at joints between SIP roof panels and at intersection of SIP roof and wall.

4. Vapor Retarders: Provide vapor retarders mandated by building code. Provide a vapor retarder, such as 6 mil (0.006") (0.15 mm) polyethylene on SIP applications which are connected using methods other than surface splines.

5. Thermal Barriers: Interior surfaces of SIPs shall be finished with a minimum 15-minute thermal barrier, such as 1/2" (13 mm) gypsum wallboard, nominal 1" (25 mm) wood paneling, or other approved materials. Apply code approved thermal barriers according to SIP manufacturer’s recommendations.

6. Restrictions: Do not install SIPs directly on concrete. Do not put plumbing in SIPs without consulting SIP manufacturer. Do not overcut skins for field-cut openings and do not cut skins for electrical chases. SIPs shall be protected from exposure to solvents and their vapors that damage the EPS foam core.

7. Remove and replace insulated wall or roof SIPs which have become excessively wet or damaged before proceeding with installation of additional SIPs or other work.

06 12 00 - 6

3.4 FIELD QUALITY REQUIREMENTS

A. Manufacturer’s Field Services: Upon Owner’s request, provide manufacturer’s field service consisting of product use recommendations and periodic site visits for inspection of product installation in accordance with manufacturer’s instructions.

3.5 PROTECTION

A. Protection: Protect installed product and finish surfaces from damage during construction.

1. Roof SIPs: Protect roof SIPs from weather by roofing materials to provide temporary protection at the end of the day or when rain or snow is imminent.

2. After installation, cover SIPs to prevent contact with water on each exposed SIP edges and faces.

END OF SECTION 06 12 00