Hey twitter. Need your help figuring out what all these blue strings in the rebar are for. http://t.co/wMsIuA7p96 ghelleks ...from Twitter 2013-03-28 1 Minute Hey twitter. Need your help figuring out what all these blue strings in the rebar are for. http://t.co/wMsIuA7p96 — Gunnar Hellekson (@ghelleks) March 28, 2013 Share this:TwitterFacebookLike this:Like Loading... Published by ghelleks View all posts by ghelleks Published 2013-03-28