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Delete paragraph below if no welding is required.  Retain “Welding Certificates” Paragraph in ”Submittals” Article if paragraph below is retained.  AWS states that welding qualifications remain in effect indefinitely unless welding personnel have not welded for more than six months or there is a specific reason to question their ability.

G.

Welding:  Qualify procedures and personnel according to AWS D1.1, “Structural Welding Code – Steel”; and AWS D1.4, “Structural Welding Code – Reinforcing Steel.”

Retain paragraph below if fire-rated units or assemblies are required.  Select either PCI MNL 124 or ACI 216.1/TMS 0216.1 or retain both if acceptable to authorities having jurisdiction.

H.Calculated Fire-Test-Response Characteristics:  Where indicated, provide architectural precast

concrete units whose fire resistance has been calculated according to [PCI MNL 124, “Design for Fire Resistance of Precast Prestressed Concrete,”] [ACI 216.1/TMS 0216.1, “Standard Method for Determining Fire Resistance of Concrete and Masonry Construction Assemblies,”] and is acceptable to authorities having jurisdiction.

PCI recommends review of preproduction sample panels or first production unit.  Revise size and number of sample panels to suit Project.

I.Sample Panels:  After sample approval and before fabricating architectural precast concrete units, produce a minimum of two sample panels approximately 16 square feet in size for review by Architect.  Incorporate full scale details of architectural features, finishes, textures, and transitions in the sample panels.

1.

Locate panels where indicated or, if not indicated, as directed by Architect.

2.

Damage part of an exposed-face surface for each finish, color, and texture, and demonstrate adequacy of repair techniques proposed for repair of surface blemishes.

3.

After acceptance of repair technique, maintain one sample panel at the manufacturer’s plant and one at the project site in an undisturbed condition as a standard for judging the completed Work.

4.

Demolish and remove sample panels when directed.

PCI recommends production of finish and texture range samples when color and texture uniformity concerns could be an issue, the Architect or precaster has not had previous experience with the specified mix and finish, or a large project has multiple approving authorities.

J.Range Samples:  After sample panel approval and before production fabrication of architectural precast concrete units, produce a minimum of <three> <five> samples, approximately 16 square feet in size, representing anticipated range of color and texture on project’s units.  Following range sample acceptance by the Architect, maintain samples at the manufacturer’s plant as color and texture acceptability reference.

Delete paragraph and subparagraphs below if sample panels above will suffice and the added expense of mockups is not required.  If retaining, indicate location, size, and other details of mockups on Drawings or by inserts.  Revise wording if only one mockup is required.

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