subscribe to ENR magazine subscribe
contact us
industry jobs industry jobs
events events
Dodge Data & Analytics
ENR Logo
Web access will be provided
as part of your subscription.
This content is available for purchase. It is FREE of charge for ENR subscribers.

Independence Hall’s Leaks Uncover Mystery Iron Rods

Publication Date: 5/13/2009
Author: Bruce Buckley
Format: HTML

Structural engineers from Keast & Hood are a bit baffled in the belfry of historic Independence Hall in Philadelphia. As part of a planned $4.3-million renovation, triggered by leaks in the landmark’s tower, the local firm discovered that several lines of iron rods, which run vertically down the center of the tower’s 2.75-in.-thick wooden siding, have significantly deteriorated. But the team doesn’t know why the rods are there in the first place, so they don’t know if they need to be repaired or replaced.

Sign In 
Enter your email address and password below
Sign up for ENR | Forgot your Password?


Subscribe to access content 

Monthly Subscription (Automatic Renewal):
Access all articles published on for only $9.95/Month.

Annual Subscription:
Get ENR magazine for one year plus access to all articles published on, along with all the benefits described*
U.S. for only $49.95/Year
Canada $99/Year (US funds)
All other $125/Year (US funds).


Need to register your ENR print subscription? 

Enter your print subscription account number from your mailing label or your order acknowledgement here

Print subscription number:

For help finding your subscriber number click here
  • ENR’s national and regional tablet digital editions
  • FREE — ENR’s Greatest Construction Projects digital edition with your paid subscription
  • BONUS — ENR Future Tech & ENR Risk Review e-newsletters
  • Access to with daily updates and archives
  • Regional news and information
  • Daily news alerts & weekly e-newsletters
  • Construction methods & equipment
  • Industry forecasts
  • Quarterly cost reports
  • Opinions from the experts
  • Top Lists (Company Rankings)
  • Risk management
  • Safety and health
  • Technology tools
  • Asset management
  • Specialty contractor innovation