The determine calls it an imaginary line, but it isn't imaginary. It is only "imaginary" with respect to being quite a bit line, as it's not a whole lot line. But the space that establishes exterior wall fire-resistance rankings and allowable opening percentages is predicated on the distance to this https://josueksahp.madmouseblog.com/16850736/not-known-facts-about-ibc-container-gebraucht