The embedded wires in the glass act as a break plane making the glass just half as strong as annealed glass.
San francisco law on wire glass doors.
In addition any glass located adjacent to a door within a 24 inch arc of the door must be constructed from safety glass if the bottom edge of the glass is less than 60 inches above the walking.
Or replacement of windows in san francisco.
Since 2003 the use of traditional wired glass in doors sidelites or locations where impact is a concern has been narrowed.
This document hereinafter represents the san.
That exemption no longer applies.
Glass sloped 15 degrees 0 26 rad or less from vertical in windows curtain and window walls doors and other exterior applications shall be designed to resist the wind loads due to ultimate design wind speed v ult in section 1609 for components and cladding.
Every required exit doorway shall be of a size that permits the installation of a door not less than 3 feet in width and not less than 6 feet 8 inches high.
For example windows placed within 2 feet of doors and where the bottom edge.
When installed in exit doorways exit doors shall be capable of opening at least 90 degrees and shall be mounted so that the clear width of the exitway is no less than 32 inches.
Glass in glazed curtain walls glazed storefronts and glazed partitions shall meet the seismic requirements of asce 7 section 13 5 9.
The codes exempted traditional wired glass where fire rated glazing was needed.
The california building code requires the use of safety glazing or safety plate glass in areas subject to human impact.
Please note that rehabilitation and alteration standards for the preservation of designated city landmark properties including contributing buildings in historic or conser vation districts are contained in articles 10 and 11 of the planning code.