![Fire Door Brain Teaser - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene. Fire Door Brain Teaser - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.](http://idighardware.com/wp-content/uploads/2011/10/NFPA-80-Locations.jpg)
Fire Door Brain Teaser - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
![The door of an almirah is 4m high, 1m wide and weights 50kg . The door is supported by two hinges situated at a distance of 1.0m from the ends. If the The door of an almirah is 4m high, 1m wide and weights 50kg . The door is supported by two hinges situated at a distance of 1.0m from the ends. If the](https://haygot.s3.amazonaws.com/questions/982025_0a253f059d1a47bb9df6e4a869166fb4.png)
The door of an almirah is 4m high, 1m wide and weights 50kg . The door is supported by two hinges situated at a distance of 1.0m from the ends. If the
![SDI 135: Guidelines to Measure for Replacement Doors in Existing Frame Openings | Steel Door Institute SDI 135: Guidelines to Measure for Replacement Doors in Existing Frame Openings | Steel Door Institute](https://www.steeldoor.org/wp-content/uploads/2020/02/135-fig1.png)