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Ventilation rate

Discussion in 'Mechanical Codes' started by Sifu, Jul 1, 2019.

  1. Sifu

    Sifu Gold Member

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    Looking at IMC t403.3 and/or ASHRAE t6-1, or any other guiding document, does anybody have an idea as to what a "sewing area" be considered when trying to figure out ventilation rates? This is a room where 18 occupants will sit at sewing machines and work.
     
  2. Ty J.

    Ty J. Registered User

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    I'd put it as the same as a computer workroom w/out printing. Most comparable use provided.

    No like sewing machines emit any vapor or create much dust.

    upload_2019-7-1_10-46-30.png
     
  3. ADAguy

    ADAguy Sawhorse

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    Does the term "sweatshop" mean anything or working under the lights (hot?).
     
  4. rgrace

    rgrace Sawhorse

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    Temperature control and fresh air are two different things. I would agree somewhat with the computer workroom classification, however there is probably quite a difference in the metobolic rates. Perhaps a mix with that and commercial laundry?
     
  5. ADAguy

    ADAguy Sawhorse

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    As opposed to a dry cleaners?
     
  6. tmurray

    tmurray Sawhorse

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    I'm wondering if commercial laundry ventilation rates assume additional moisture load that needs exhausted that would not be present in this situation.
     
  7. ADAguy

    ADAguy Sawhorse

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    I am more concerned as to offgassing of dry cleaning chemicals that might impact workers.
     
  8. tmurray

    tmurray Sawhorse

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    Am I missing something? How do you guys sew down there anyway?
     
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  9. ADAguy

    ADAguy Sawhorse

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    Material floor to ceiling, limited aisles, blocked windows, think Shirtwaist fire years ago.
     
  10. HForester

    HForester Member

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    How is a sewing area any different from any other place where people sit and do assembly work? Does sewing release chemicals? Maybe it is a little dusty...but operators could simply just wear masks to comply with OSHA.
     
  11. Sifu

    Sifu Gold Member

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    I made a site visit and met with the contractor. The use is an open floor where 5 to 7 people will make custom curtains, though I figured my ventilation rate on 18 based on the density. The previous use and existing ventilation exceeded what I think they need based on the what they were doing (using the computer room w/o printing is about the closest thing I could figure) so I am fine with it. Certainly if I thought it would involve dry cleaning, chemicals or a sweat-shop use I would have more concerns but this is none of those things so to them I say have a nice day and I wish them success in their venture.
     
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