I have seen good glazed brick from the 1920's, 60's and today. I have seen failed contemporary glazed brick but not many failed from the past - fewer of those buildings survive. Ralph's numbers are right. When we got started working on the Chrysler building the new owners said they had 10,000's of bricks in the basement from the last repairs (10-20 or so years past) and asked if we could use them - they even had test reports! Clear as day, the bricks were destined to spall from freeze-thaw. Rejected the bricks. Got new ones from Glen Gery. Those tested exceptionally well. Most contemporary bricks are much stronger than the old - nearly 20,000 psi compression. Anyway, when we started the investigation/repairs we discovered that the original 1920's brick and mortar was is in good condition (some mortar errosion obviously) but the repair areas poor condition. Many spalled bricks and the repair mortars to hard and dense caused more bricks to fail! Another thought, first stated to me by Don Friedman, it may not be the "brick's" fault in the 1960's but the "new" technology of the curtain wall that designers and builders did not account for the increased stresses put on the brick from the older composite wall. I fully agree with that too! Eric -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Sat Dec 02 19:18:17 2006 To: [log in to unmask] Subject: [BP] glazed brick So, is glazed brick as it is presently made any "better" than the infamous glazed brick of the 1960s? Christopher -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: http://listserv.icors.org/archives/bullamanka-pinheads.html <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> The information in this email and any attachments may contain confidential information that is intended solely for the attention and use of the named addressee(s). This message or any part thereof must not be disclosed, copied, distributed or retained by any person without authorization from the addressee. If you are not the intended addressee, please notify the sender immediately, and delete this message. <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: <http://listserv.icors.org/archives/bullamanka-pinheads.html>