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RE: Cantilevered Glass Balcony Rails

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We use CAN/CGSB-12.20-M89 (old Canadian standard but still in use).

If you are considering no top rail, this standard doesn't allow it ... that 
 said, there are engineers who will sign off on a no-top rail system but 
it's (Code-wise) wrong.

IStructE (UK) has, "Structural Use of Glass in Buildings (Feb 2014).  I find 
 it an excellent guide.  Therein too it strongly recommends that a no-top 
rail system should be subject to a risk analysis before eschewing the top 

Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE, FEC
Victoria, BC
Email: vicpeng(--nospam--at)
Please consider the environment before printing out this e-mail

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of T. William (Bill) Allen, S.E. Sent: September-19-14 11:25 AM
To: seaint-seaosc(--nospam--at)
Subject: [SEAINT-SEAOSC] Cantilevered Glass Balcony Rails

Does anyone have a link or reference to a design guide or curves which would 
 assist in designing the glass panels, particularly for the condition where 
 the glass is anchored by discrete post bases rather than a continuous shoe? 


T. William (Bill) Allen, S.E. (CA 2607)
A L L E N   D E S I G N S
Consulting Structural Engineers
33171 Paseo Cerveza, Suite 221
San Juan Capistrano, CA 92675
V (949) 248-8588 * C (949) 374-1536

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