That’s OK. Why don’t we plan on the landing areas to be 556.15 at each end then. I will send you the grading file in the morning. Please review and if you would like to suggest any changes, just let me know. ________________________________ From: Christiansen, Eric [mailto:echristiansen@halff.com] Sent: Thursday, April 15, 2010 3:40 PM To: Bruce Dunne Cc: Barnett, Clay Subject: RE: South Pedestrian Bridge Bruce, We asked Contech that very same question earlier this week and were told that would not be possible; the dimension 2'-8" is the best they could do with the Keystone pedestrian truss. The only way Contech can reduce that dimension to something that would be helpful is by using a Gateway pedestrian truss, which is the box truss we showed everyone at the meeting this morning. It is not very attractive and was not well received by the Town. Unfortunately, there is no other option with Contech. While you've got a minute, I was hoping you could send us your proposed grading for the site. We have your existing grading reference file, but we don't have the proposed. Seeing how you've revised that recently due to the changes at Bella, we wouldn't have the updated file anyway. Would you please send the proposed grading file (dgn) to us? Thanks! Eric Eric S. Christiansen, P.E., SECB, LEED AP Senior Structural Engineer HALFF ASSOCIATES, INC. 1201 North Bowser Road Richardson, Texas 75081 Phone 214-346-6284 Fax 214-739-0095 Cell 972-955-2996 www.halff.com From: Bruce Dunne [mailto:bdunne@icon-engineers.com] Sent: Thursday, April 15, 2010 2:44 PM To: Christiansen, Eric Cc: Barnett, Clay Subject: RE: South Pedestrian Bridge Eric – you had mentioned in this email the possibility of requesting Contech to shallow up the pedestrian truss. Per our discussion this morning, we are going to raise the landings by about 8”. Is it worth a try to see if Contech could reduce the depth of the structure by 8”? That way, UDR would not have to demo any of their existing walkway. Just a thought. ________________________________ From: Christiansen, Eric [mailto:echristiansen@halff.com] Sent: Tuesday, April 13, 2010 2:33 PM To: Bruce Dunne Cc: Barnett, Clay Subject: RE: South Pedestrian Bridge Importance: High Bruce, After reviewing our calculations, it appears that we should be able to reduce our request for raising the landings. Previously, we were using the 100-year WSEL that Viewtech indicated on their drawings dated this past January. Of course, we've been told that those drawings were erroneous. Now, using the drawings from June of 2009, we see that this value should be 552.00'. If we add the structure depth of 2.67', that shows the landing must be at 554.67' with no freeboard. Since the current landing drawing shows them to be at an elevation of 555.50', we actually have 0.83' of freeboard with no adjustment whatsoever. Halff has requested Contech to try and shallow up the pedestrian truss by 6"-8". If we can get the landings raised by a similar amount (6"-8"), we could theoretically reach the 2' of freeboard we're trying to attain. Please respond by letting us know how much the landings could be raised. Thanks, Eric Eric S. Christiansen, P.E., SECB, LEED AP Senior Structural Engineer HALFF ASSOCIATES, INC. 1201 North Bowser Road Richardson, Texas 75081 Phone 214-346-6284 Fax 214-739-0095 Cell 972-955-2996 www.halff.com From: Bruce Dunne [mailto:bdunne@icon-engineers.com] Sent: Friday, April 09, 2010 3:31 PM To: Christiansen, Eric Cc: Barnett, Clay Subject: South Pedestrian Bridge Eric – you need to look at other options than this 32” deep bridge structure you are currently proposing for the pedestrian bridge. It will not work with what has currently been constructed. BRUCE F. DUNNE, P.E. President icon Consulting Engineers, Inc. Bicentennial Financial Center 250 W. Southlake Blvd., Suite 117 Southlake, Texas 76092 Phone: (817) 552-6210 Fax: (817) 552-3126 Mobile: (817) 707-9711