Cantilevered Glass Guard
Cantilevered Glass Guard
(OP)
I have a client who would like a cantilevered glass guard around the 2nd floor level of their boathouse (10 to 12 ft. height above grade/water level). Guard would be 1070 mm (42in.) high, no posts, no top/bottom rails. I have been shown examples of similar type rails installed by the glass supplier.
The applicable design standard in Canada is CGSB 12.20, Structural Design of Glass For Buildings. This standard requires "Any free standing glass guard shall be capped by a rail which is continuous over two or more lights. The glass guard shall resist the factored design load after failure of alternate lights."
I am questioning why there are so many existing cantilevered glass guards without top rails when it seems to be required by the design standard, or is my interpretation incorrect? I would welcome any thoughts/suggestions from persons who may have experince with similar type guards.
The applicable design standard in Canada is CGSB 12.20, Structural Design of Glass For Buildings. This standard requires "Any free standing glass guard shall be capped by a rail which is continuous over two or more lights. The glass guard shall resist the factored design load after failure of alternate lights."
I am questioning why there are so many existing cantilevered glass guards without top rails when it seems to be required by the design standard, or is my interpretation incorrect? I would welcome any thoughts/suggestions from persons who may have experince with similar type guards.






RE: Cantilevered Glass Guard
This can e posted in the Glass Engineering Forum, too.
Dik
RE: Cantilevered Glass Guard
I was looking in Part 4 at clause 4.3.6.1 of the Ontario Building Code (OBC) "Design Basis for Glass - (1) Glass used in buildings shall be designed in conformance with CAN/CGSB12.20-M, "Structural Design of Glass for Buildings"
With the glass, I am in somewhat unfamiliar territory and any suggestions are welcome. I will wait a few days before posting in the Glass Engineering forum (of which I browsed before posting).
Thanks
RE: Cantilevered Glass Guard
http://www.FerrellEngineering.com
RE: Cantilevered Glass Guard
I've done glazing design using principles and properties as connectegr has...
Dik
RE: Cantilevered Glass Guard
Just a thought.
RE: Cantilevered Glass Guard
http://www.FerrellEngineering.com
RE: Cantilevered Glass Guard
Perhaps could consider a laminated or double glass system where the front sheet could be sacrificial to any impact (ie. break) and the second panel of the laminate could still structurally take any short term load? This would go along the same logic as the top rail, except you are using glass panel as backup instead of a top rail...?