Glass for safety / Stronger!!!
If the client is worried about the glass breaking in the windows overseeing the manufacture production line, which types of glass should the architect specify? Beside tempered and heat-treated - Laminated or Safety glass should be best?? Or can’t be both options in the same questions? I know NCARB tends to steer away from nuances.!!!!
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It's actually not from NCARB practice exam.. but here's the full question if you can help.. TY.
The owner of a IIB manufacturing plant is working with an architect to complete an
observation deck addition over their production line. If the client is worried about the glass
breaking in the windows overseeing the line, which types of glass should the architect
specify? (Pick Three)
a. Annealed Glass
b. Tempered Glass
c. Heat-Treated Glass
d. Laminated Glass
e. Fire-Rated Glass
f. Safety Glass -
The best answer is laminated. Laminated is the strongest and stays together when it breaks. It's what you colloquially call safety glass. Tempered is second strongest. Honestly idk what the correct answer is meant to be since like you said, D & F are the same thing and the best answer. I assume this question is not from Ncarb.
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The main point to focus on here for me would be reducing the likelihood of glass breaking and falling onto the line as the client's top concern.
- Annealed - breaks in large shards
- Tempered - breaks into small pieces
- Heat-treated - resists breaking and stays in the frame
- Laminated - holds together when broken
- Fire-rated - appropriate for applications needing fire resistance/protection
- Safety - category of glass
Process of elimination leads me to believe that Tempered/Heat-treated/Laminated would be the best options. Safety glass is the overarching category with specific types (tempered, etc), fire-rated isn't a concern (II-B construction). Heat-treated and laminated are best to resist breaking and falling on the line. For the last two options, the safest would be temprered that breaks into smaller fragments vs annealed that breaks into larger pieces.
Few sources I found in relation: annealed v. tempered, laminated and fire-rated, heat-treated, etc
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Thanks a lot abruno168 for your thorough explanation. I guess you're done testing already!
but the answer eliminates laminated glass for the following: The answer says: Laminated glass is not as strong as annealed glass, but when it breaks the plastic holds the glass shards in place to minimize dangerous loose shards.
Which really confusing me. -
Nothing wrong with the question. As someone else pointed out, window overlooks production line. That is the critical piece of information, telling you needed performance criteria is to keeping falling glass from hitting people working below. Laminated glass does that. Remember you are looking for the best answer of the choices given, not the perfect answer. Not all types of safety glass will prevent falling shards.
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The issue imo is the answers. It's a pick three and the three correct choices are B, C, and F which are tempered, heat-treated, and safety, respectively. Like the question says, the main client concern is glass breaking and falling on the assembly line but the answers don't line up with that criteria. Tempered, if broken, would fall onto the line (albeit a 'safer' option vs annealed, for example) and safety isn't necessarily a type but a category. It's confusing.
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