From: "Sprague, Harold O." <SpragueHO(--nospam--at)bv.com>
Date: Tue, 6 Feb 2001 10:06:13 -0600
You need to obtain:
1. Parking Structures, Planning, Design, Construction, Maintenance, and
Repair by Chrest, Smith and Bhuyan
2. ACI 201.1R "Guide for Making a Condition Survey of Concrete in
A chain drag study is a process that is used to determine delaminations in
reinforced concrete. I have used a series of chains suspended from an axle
with wheels and a handle. This device can cover a lot of area in a hurry.
When a chain is dragged over a delamination, the sound is distinctly hollow.
You can then take a hammer and tap around to define the perimeter of the
delamination. You then spray paint out the perimeter. You should then take
a representative bay and determine the percent area of slab delamination.
This is important for determining repair costs.
If this is your first parking garage condition assessment, I would suggest
that you have your work reviewed by a seasoned parking garage repair
specialist. Have the review done at various stages, especially in planning
the work. There are a myriad of tests that may or may not be appropriate
depending on what you observe in the initial walk-through phase.
Harold O. Sprague
> -----Original Message-----
> From: Hyndman, Keith [SMTP:KHyndman(--nospam--at)engineeringsi.com]
> Sent: Tuesday, February 06, 2001 9:27 AM
> To: 'seaint(--nospam--at)seaint.org'
> Subject: Perform A Chain Drag Study?
> I've been asked to evaluate an Existing Concrete Parking Garage. Part of
> the study is to check wear on the parking surface using a Chain Drag
> Study. Anybody know waht that is, how you do it, limiting criteria, etc?
> Thank you,
> Keith Hyndman
> Exton, PA