This Standard specifies requirements for the manufacture and testing of skylights comprising a factory-glazed assembly to permit natural light transmission. The Standard includes requirements for materials, fastenings and hardware, weatherproofing, safety labels and marking for skylights complete and ready for installation in a roof opening. It is designed for use by manufacturers, designers and consumers alike.This Standard does not apply to 'barrel vault' type skylights.NOTES:1 Alternative methods for determining compliance with this Standard are given in Appendix A.2 While information on the choice of a skylight for a particular application is outside the scope of this Standard, information is provided in the Commentary in D1, that provides some guidance in this respect.