| Author |
Message |
Michael Chusid
Senior Member
Username: michael_chusid
Post Number: 18
Registered: 10-2003
| | Posted on Tuesday, April 21, 2015 - 03:22 pm: |    |
I need to specify the quality of the cut edges of steel and aluminum plate. The cuts are complex curvature and will probably be made with a torch or other method that will yield rough, jagged edges. My intent is to limit bidding only to those who will produce smooth, even cuts without rough or jagged edges. Do you know a standard to which I can refer?
Michael Chusid, RA FCSI CCS
www.chusid.com www.buildingproduct.guru |
J. Peter Jordan
Senior Member
Username: jpjordan
Post Number: 820
Registered: 05-2004
| | Posted on Tuesday, April 21, 2015 - 03:34 pm: | |
Doesn't really answer you question, but what about specifying water jet. This might yield a smoother cut. |
Michael Chusid
Senior Member
Username: michael_chusid
Post Number: 20
Registered: 10-2003
| | Posted on Tuesday, April 21, 2015 - 03:44 pm: | |
J. Peter: Good suggestion. The fabricator I am using as basis for specs uses a CNC laser cutter and takes pains to sand all surfaces and ease edges. I would prefer to specify a reference standard instead of a vague description, however, so I have better safeguards against substitutions.
Michael Chusid, RA FCSI CCS
www.chusid.com www.buildingproduct.guru |
William C. Pegues, FCSI, CCS
Senior Member
Username: wpegues
Post Number: 928
Registered: 10-2002
| | Posted on Tuesday, April 21, 2015 - 03:51 pm: | |
Do you have, or can you obtain, a sample. Match architect's sample is a great quality control requirement for these kinds of things. We have many items for custom fabrication collected over time where we use them for this kind of purpose. Works fine.
William C. Pegues, FCSI, CCS, SCIP Affiliate
WDG Architecture, Washington, DC | Dallas, TX |
Greta Eckhardt
Member
Username: gretaeckhardt
Post Number: 3
Registered: 08-2013
| | Posted on Wednesday, April 22, 2015 - 09:24 am: | |
Surprisingly, the AISC Code of Standard Practice does not seem to address this exact topic for Architecturally Exposed Structural Steel but you could use it as a guide for industry-standard language. I have a copy of a very helpful article on AESS titled AESS Supplement - Modern Steel Construction, May 2003, which contains suggested specifications, including a brief mention of grinding of sheared edges. Perhaps you can find a copy on the internet if you don't have one already. |
ken hercenberg
Senior Member
Username: khercenberg
Post Number: 894
Registered: 12-2006
| | Posted on Wednesday, April 22, 2015 - 10:15 am: | |
Greta, here is the article:
https://www.aisc.org/WorkArea/showcontent.aspx?id=17506
MasterSpec Section 051213 for AESS has sample requirements as well as guidelines for grinding and otherwise finished surfaces that have been cut or welded based on AESS Category. The article has explanations regarding the different Categories.
The sample spec in the article has some very good mock-up requirements as well. |
Mark Gilligan SE,
Senior Member
Username: mark_gilligan
Post Number: 723
Registered: 10-2007
| | Posted on Wednesday, April 22, 2015 - 02:20 pm: | |
Are you sure that what you are dealing with is actually considered "structural steel" according to the definition in the AISC Code of Standard Practice? What is considered structural steel by AISC may not be what you understand to be structural steel.
It may still be appropriate to use the AESS provisions you may just want to make it clear that the structural steel provisions apply to steel that is not considered structural steel. |
Gerard Sanchis
Senior Member
Username: gerard_sanchis
Post Number: 92
Registered: 10-2009
| | Posted on Thursday, April 23, 2015 - 08:35 pm: | |
Due to their location (in an exitway), the building official insists that the pedestals supporting an exterior deck be incombustible.
The majority of the pedestals available today are made of high strength plastic. I found what looks like a precast concrete system by Hanover. Does anyone know of another non-combustible unit? |
Michael Chusid
Senior Member
Username: michael_chusid
Post Number: 21
Registered: 10-2003
| | Posted on Thursday, April 23, 2015 - 09:01 pm: | |
Gerard:
This company makes fire-resistant plastic shims, if that can do the job for you. Maybe you make up most of the height with a brick, then shim the rest of the way. They also do custom work - maybe they will make pedestals.
Have you contacted the plastic pedestal makers to see if they can use a fire resistant plastic?
Chances of a paver pedestal burning/melting is pretty slim. "Heat Rises" as they say. Perhaps you can coat them with an intumescent coating..
Michael Chusid, RA FCSI CCS
www.chusid.com www.buildingproduct.guru |
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