CSA Group CSA S806:26 National Standard of Canada Design and construction of building structures with fibre-reinforced polymers

Preface

This is the third edition of CSA S806, Design and construction of building structures with fibre-reinforced polymers. It supersedes the previous editions published in 2012 and 2002.

This Standard contains provisions for building structures composed of fibre-reinforced polymers (FRP). The fibres are of aramid, basalt, carbon, and glass. The polymers are resins that are rigid at room temperature; relevant provisions relate to thermosetting types of resin. This Standard covers general design requirements, limit states design, the properties of FRP components and reinforcing materials, the design of concrete components with FRP reinforcement, the design of concrete components prestressed with FRP, the design of components with surface-bonded FRP, the design of fibre-reinforced concrete (FRC)/FRP composite cladding, and seismic design and construction. Internal FRP is covered in Clauses 7 to 13 and external FRP is covered in Clause 14. Normative annexes provide test procedures that are integral to the Standard, while informative annexes describe best current practice. Additionally, climate resiliency considerations for FRP reinforcing members has been addressed in Annex L.

The following are the major changes to this edition:

1) Annex L on climate resiliency considerations for FRP reinforcing members has been added.

2) Annex J on the procedure for the determination of a fire-resistance rating for concrete reinforced with FRP and concrete members strengthened with FRP has been updated from an informative to a normative annex. In addition, the provisions related to fire resistance and the combustibility of FRP-reinforced concrete construction have been revised to reflect the current state of the art.

3) The provisions of Clause 12 on seismic design of FRP reinforced concrete in new construction has been expanded.

4) New provisions for punching shear design with FRP shear studs in Clause 8 have been added.

5) Provisions for interface shear transfer in Clause 8 have been added.

6) The deflection calculation for FRP reinforced concrete elements in Clause 8 has been simplified.

7) New provisions for the retrofit of reinforced concrete members for shear have been added in Clause 14.

CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of the National Research Council of Canada (NRC).

This Standard was prepared by the Technical Committee on Design and Construction of Building Components with Fibre-Reinforced Polymers, under the jurisdiction of the Strategic Steering Committee on Construction and Civil Infrastructure, and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Notes:

1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as "substantial agreement." Consensus implies much more than a simple majority, but not necessarily unanimity. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

4) A request for interpretation can be submitted to clarify the meaning of a provision in this Standard. To submit a request for interpretation, please refer to www.csagroup.org/request-for-interpretation. Committee interpretations are processed in accordance with CSA Directives and guidelines governing standardization and are available on the Standards Activities page at standardsactivities.csagroup.org.

5) This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to [email protected] and include "Proposal for change" in the subject line:

a) Standard designation (number);

b) relevant clause, table, and/or figure number;

c) wording of the proposed change; and

d) rationale for the change.

1 Scope

1.1 General

This Standard provides requirements for the design and evaluation of building components of fibre-reinforced polymers (FRP) in buildings and of building components reinforced with FRP materials. It is based on limit states design principles and is consistent with the National Building Code of Canada.

This Standard does not apply to the design of fibre-reinforced concrete (FRC), except for FRC/FRP cladding as defined in Clause 7.2and Clause 13.

Note: Procedures, test methods, and specifications are provided in Annexes Ato M.

1.2 FRP components

Requirements for the determination of engineering properties and design of self-supporting FRP components are covered by this Standard.

1.3 FRP reinforced components

Requirements for the determination of engineering properties and design of FRP reinforced building components are covered by this Standard. The FRP reinforcing elements covered include bars, tendons, mats, grids, roving, sheets, and laminates.

1.4 Exposure to fire and temperature effects

This Standard requires the designer to consider the possible effects of exposure to fire or elevated temperatures on the performance of FRP components and FRP reinforced components.

1.5 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.