International Residential Code, 2009 Edition (with amendments).
(a) Sizing and Capacity of Gas Piping, Appendix A
(b) Sizing of Venting Systems, Appendix B
(c) Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems, Appendix C
(d) Radon Control Methods, Appendix F
(e) Swimming pools, Spas and Hot tubs, Appendix G
(f) Patio covers, Appendix H
(g) Existing buildings and structures, Appendix J