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"The purpose of this manual is to provide an analytical method of evaluating the fire endurance of structures made of precast and prestressed concrete. The manual brings together information from many sources, and presents the data in a convenient form. Example problems illustrate the use of the design aids and principles outlined in the text. In recent years, building officials, architects, and engineers have become increasingly aware of the unreliability of results of fire tests. Through the use of the engineering principles outlined in this manual, a greater degree of reliability in predicting fire endurance of structures or assemblies can be achieved. It is the hope of the PCI Fire Committee that building codes will adopt provisions permitting engineering analyses as the basis for establishing the fire endurance of a structure. Building codes should encourage the use of such engineering analyses by permitting a reduction in the fire rating requirements when such analyses are performed. The Committee feels that this manual represents a landmark contribution to designers, building officials, and insurance underwriters who are concerned with fire safety of buildings. Not only does this manual present a rational design approach for the safety of precast prestressed concrete structures, but also it places precast and prestressed concrete in the forefront of a long overdue frontier -- that of structural design for fire resistance."--Page iii.
PCI-124-18 The Precast/Prestressed Concrete Institute (PCI) first issued a manual for the design for fire resistance of precast/prestressed concrete in 1977. A second edition was prepared in 1989 and a third edition in 2011. The recommended design procedures in those three editions were based on fire test data and reports for precast/prestressed concrete dating back to the 1960s. Little has changed since then in fundamental design for fire resistance. While fire resistance is discussed in other publications as "calculated" fire resis- tance, those provisions have generally been prescriptive. That is, tables of information are used to select concrete mass or protection for steel. Since the first edition of the PCI manual, rational design, which is truly a fire resistance calculation procedure, has been demonstrated. Though not a standard, the first edi- tion of the International Building Code in 2000 referenced the procedures in the PCI fire design manual as being acceptable for prestressed concrete slabs not covered elsewhere.With the 2014 designation of PCI as an ANSI (American National Standards Institute) Accredited Stan- dards Developer, the material for fire resistance of precast and precast, prestressed concrete was deemed important enough to the precast concrete industry that the newest edition of the provisions would be developed in a consensus standard form. Thus, the design procedures would be referenced in the 2021 International Building Code as a standard developed through an ANSI consensus process.
Specification for Fire Resistance of Precast and Prestressed Concrete (PCI 124-23)This standard specifies requirements for the design of precast and precast, prestressed concrete elements to resist fire and provide fire protection. This standard provides acceptable methods to determine the fire resistance of precast concrete structural elements, including walls, floor and roof slabs, beams, and columns. The fire exposure and applicable end-point criteria of ASTM E119 shall be used in the application of these methods for design. This is an update to PCI 124-18.
The Sixth Edition provides easy-to-follow design procedures, newly formatted numerical examples, and both new and updated design aids using ASCE 7-02, ACI 318-02, the third edition of the AISC Steel Manual and IBC 2003. It also includes new and updated information on 15 foot wide double tee load tables, seismic design, torsion and shear design, load and resistance factors, headed stud connection design, and fire resistance.
The purpose of this manual is to assist in the design for fire resistance of precast prestressed concrete structures. According to the ICC-ES Evaluation Report ESR-1997, fire-resistance-rated precast/prestressed concrete construction may be designed using this manual as an alternative method to what is specified in the 2006 IBC Section 703.3 and the 1997 UBC Section 703.3. Since the 2nd edition, much has been experienced and learned, resulting in the need for updating the manual to its current status. Several parts have been rewritten to clarify the text and some new material has been added, but nothing has been changed that would affect the character of the manual.