Structural design of fully tempered all-glass interior entrance systems is discussed in detail in the GANA 1999 Fully Tempered Heavy Glass. Door and Entrance The aim of this guide is to promote good design practices and adherence to appropriate structural standards in fully tempered heavy glass storefronts and GANA Entrance Systems English CD-ROM Fully Tempered Heavy Glass Door and Entrance Systems Design Guide. standard published 01/01/1999 by Glass Association 6 All-Glass Entrance Systems: GANA Recommendations for Fully Tempered GANA 1999 Fully Tempered Heavy Glass Door and Entrance Systems Design Guide. mayGANA Fully Tempered Heavy Glass Door and Entrance Systems Design Guide Paperback – January 1, 1970 ; Print length. 37 pages ; Publisher. GANA ; Tell the Publisher! GANA. 1999 FT Heavy Glass Door & Entrance Systems Design Guide Recommended Maximum Interior or Exterior Swinging Door Sizes. Fully Tempered Glass. COM) GANA Engineering Standards Manual GANA Fully Tempered Heavy Glass Door and Entrance Systems Design Guide GANA Glazing Manual FGMA Sealant Manual