Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • 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!

Join Eng-Tips
*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.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

sdz (Structural) (OP)
17 Jan 11 23:15
I am designing a concrete block foundation for a reciprocating compressor and motor. I would normally provide reinforcing to the face of the block only but someone has suggested that reinforcement should be provided throughout the concrete volume.
Can anyone tell me which is the preferred practice and if reinforcement is to be provided throughout the concrete can you provide a reference to show my boss.
concretemasonry (Structural)
18 Jan 11 12:13
Normally, I hate to see block cores filled unless there is rebar in the core. If you have vibrations and reciprocating equipment there usually are better of with more mass, so full grouting should be better and is not costly. Use a grout (8"-11" slump) and NOT concrete. You never know about the harmonics and the ultimate effects.

Extra reinforcement beyond what is required structurally is usually not needed or productive.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

sdz (Structural) (OP)
18 Jan 11 19:23
Sorry Dick, I wasn't clear. When I say a concrete block foundation I mean a large monolithic lump of concrete, not a foundation made of concrete blocks.  
concretemasonry (Structural)
19 Jan 11 10:19
sdz -

Thanx for the clarification.

The mass principle is still valid in most cases and usually the reinforcement must be adequate to hold the massive block solid and tight so it acts as a single unit.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

chicopee (Mechanical)
19 Jan 11 14:30
Check this site http://civildesignhelp.info/; foundation details about several types of equipment however look at the PDF drawing details on pumps.
Two grillages of rebar on thick concrete pads is a good idea as you could encounter negative and positive moments on the concrete pads.  Also with reciprocating equipment you will be faced with vibratory forces on the concrete pads.

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!

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