Madico always recommends the use of an anchoring restraint system for glass to protect against seismic events. There are many anchoring restraint systems available. Mechanical anchoring such as FrameGard®, which holds the film in place through a combination of screws and tape and an aluminum extrusion. This is by far the safest attachment system, tested to hold from 500 to 800 pounds per linear foot of attachment.
Because many frames and building situations do not allow for screws to be used, the Wet Glaze attachment system is the most common attachment method used for these applications. Wet Glaze attachment systems have been thoroughly tested to blast mitigation standards and wind loads. As such, Wet glaze attachment systems are a very practical choice for seismic upgrades. When using the Wet Glaze attachment for a seismic event, a bead size capable of supporting the weight of the entire glazing unit is required.
A third attachment option is called GullWing. Similar to Wet Glaze, GullWing is a flexible PVC and VHB tape system that affixes the filmed glass to the framing members. GullWing is available in three sizes to accommodate the various sized glazing gaskets used in both residential and commercial windows.
Choosing the best system for your glass is based on the weight of the glass and the type of framing system. Contact your Madico sales representative and Madico Technical Services.