Previously purchased through NFPA®'s Library, all NFPA documents published prior to 1997 are now sold through the NFPA Catalog. You will be able to download your document at the end of the checkout process. Related notations are also included on several editions indicating significant changes. All editions are available to order in PDF format only. If you are looking for an edition of this that is 1997 or later, simply do a keyword search on the document number and edition year. Example: "NFPA 13 1999"