×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Attic renovation- is it one story, or 2?

Attic renovation- is it one story, or 2?

Attic renovation- is it one story, or 2?

(OP)
I am doing an attic remodel which consists of beefing up the floor joists, and finishing off part of an attic.  Also involved is the addition of shear walls and new foundations and footings in key locations.  My engineer has detailed 12" wide footings.  The plan checker wants 15"wide, 18" deep footings.  Digging under the house is no easy task (or fun), but how much of a battle should we wage?  

Do other people consider a finished attic a second story?  Most of the finished attic loads will be picked up by the new foundation.

Any thoughts?  I guess in the end it comes down to what the plan checker wants...


Andrew

RE: Attic renovation- is it one story, or 2?

A finished attic used as living space is typically considered as a seperate floor.  
As far as the footing size goes, your engineer should check  the footing for the actual loading and based on an assumed bearing value for the soil, determine if it is OK.  The bearing value would have to be verified during construction.  A calculation on the footing, sealed by a licensed engineer  will usually be sufficient for a plan checker (assuming that it is correct).  
A 12" wide footing is very narrow and uncommon.  It may be worth while to put in the footing the checker wants.

RE: Attic renovation- is it one story, or 2?

The UBC (don't know about the IBC, California and all;) states that the minimum required footing width for walls supporting 1 floor is 12". For walls supporting 2 floors, 15". Is your bottom floor a slab on grade? If so then the footing is not supporting this floor, so the attic counts as just one floor supported.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close