![WWYD? Bottom Gap on Fire-Rated Frames - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene. WWYD? Bottom Gap on Fire-Rated Frames - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.](http://idighardware.com/wp-content/uploads/2017/05/Bottom-Gap.jpg)
WWYD? Bottom Gap on Fire-Rated Frames - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
![FIRE GLASS UK on Twitter: "Use a £1 coin to help you check gaps around fire doors as these are about 3mm thick. Smoke & fire can travel through larger gaps. See FIRE GLASS UK on Twitter: "Use a £1 coin to help you check gaps around fire doors as these are about 3mm thick. Smoke & fire can travel through larger gaps. See](https://pbs.twimg.com/media/Dn7ODUqX0AAsj8t.jpg)
FIRE GLASS UK on Twitter: "Use a £1 coin to help you check gaps around fire doors as these are about 3mm thick. Smoke & fire can travel through larger gaps. See
![Fire Door Clearance - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene. Fire Door Clearance - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.](http://www.idighardware.com/wp-content/uploads/2009/04/clearance2-1024x629.jpg)