×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

vehicle concrete ramp detail

vehicle concrete ramp detail

vehicle concrete ramp detail

(OP)
I have a vehicle concrete ramp for a the metal building warehouse.
Vehicle is just a pickup truck or small forklift.

I have 2 go-by drawings and not sure which one is the proper detail to use.
Or maybe combination of these two.

Detail 1 is a 1' ramp and not connected by rebar to the building grade beam.
Detail 2 is a thickened slab with rebar connecting to building grade beam. It also uses sand which I don't know why.

I'm leaning towards detail 1, which looks at lot simpler. My only concern is differential settlement.
Shouldn't this ramp be connected to grade beam but I'm not sure what is the proper detail (smooth rebar?, etc..)


RE: vehicle concrete ramp detail

(OP)
i googled and this is similar to driveway connected to house foundation.
i will use Detail 1 and also not connect using rebar.
a properly compacted base on both shouldn't have issue with differential settlement.

curious though if there is a rebar detail (smooth, greased or whatever) connecting the 2 concrete that will not have issues with frost heave. this project is located (south texas) where that should not be an issue though.

RE: vehicle concrete ramp detail

Texas has some expansive clays does it not?

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: vehicle concrete ramp detail

(OP)
@kootk, yes

RE: vehicle concrete ramp detail

Delagina, this is a forum for professional engineers. Please use proper spelling and punctuation, and refrain from text speak.

RE: vehicle concrete ramp detail

On expansive soils around here we tend to dowel and key at the structure, provide voidform for the first 18" or so and then change to slab on grade. This allows the ramp to hinge if the ground heaves or settles.

Kootk, do you like you mail hot .ca, or .com

RE: vehicle concrete ramp detail

(OP)
@compositepro, English is not my first language.

RE: vehicle concrete ramp detail

(OP)
@jayrod12, Are you saying detail 1 is not proper for expansive soil? Can you provide a detail. thanks

RE: vehicle concrete ramp detail

Detail 1 could be acceptable, but in expansive soils there's the chance of putting a lot of stress at the dowels if the subgrade tries to heave. I'm away from a scanner at the moment. I'll provide something later if someone doesn't beat me to the punch.

RE: vehicle concrete ramp detail

(OP)
Detail 1 doesn't have dowel.

RE: vehicle concrete ramp detail

You're correct. Can you live with the top side of the ramp free to move up and down seasonally?

RE: vehicle concrete ramp detail

Quote (jayrod)

On expansive soils around here we tend to dowel and key at the structure, provide voidform for the first 18" or so and then change to slab on grade.

This is exactly what I had typed up before a call came in.

Quote (jayrod)

Kootk, do you like you mail hot .ca, or .com

I like my mail warmer than tepid, colder than scalding, and non-country specific.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: vehicle concrete ramp detail

We tie any exterior pad to the building when there is a possibility of frost heave. It basically creates a hinge between the pad and the building. Owners tend to get cranky when they can't open their door because a heaved slab is in the way.

RE: vehicle concrete ramp detail

My idea looks something like this crude sketch.




Quote (Kootk)

I like my mail warmer than tepid, colder than scalding, and non-country specific.

Tried sending you a test again. If I got it wrong again, then I'm apparently worse at puzzles than previously thought.



RE: vehicle concrete ramp detail

I agree with not connecting them. Differential settlement would be on my mind as well.

RE: vehicle concrete ramp detail

Also note that while this is designed for a pickup/forklift, at some time, someone will use it for the largest vehicle that will fit through the opening, so the loads may be higher.

RE: vehicle concrete ramp detail

(OP)
is that dowel just a regular deformed bar? i'm currently looking at this different joints where some detail use smooth bars

RE: vehicle concrete ramp detail

Yes in my post it is just a standard bar.

RE: vehicle concrete ramp detail

KootK:

I've used that often but usually use about 4' of voidform and provide +ve reinforcing in the slab...

Seems to have worked... and usually use dowels, but straight and generally larger diameter unless a real slope to the driveway (then use cranked) and put formed 'chevron' drainage channels in the concrete shedding water.

Dik

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

White Paper - Reshoring Prototyping and Production
In this whitepaper, we'll provide insight into why and when it makes sense for U.S. manufacturers to reshore prototyping and production, and how companies can leverage the benefits of working with local design, prototype, and manufacturing partners during the pandemic and beyond. Download Now
Engineering Report - Top 10 Defect Types in Production
This 22-page report from Instrumental identifies the most common production defect types discovered in 2020, showcases trends from 2019 to 2020, and provides insights on how to prevent potential downtime in 2021. Unlike other methods, Instrumental drives correlations between a variety of data sources to help engineers find and fix root causes. Download Now
White Paper - Addressing Tooling and Casting Requirements at the Design Stage
Several of the tooling and casting requirements of a part can be addressed at the design stage. If these requirements are not addressed at the design stage, lot of time is spent in design iteration when the design reaches the die caster. These design issues lead to increase in time and cost of production leading to delay in time to market and reduced profits for the organization. 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