More detailed floor plans include “dimension strings” to locate windows, doors, walls and other architectural elements. Dimension strings are drawn parallel to the element with 45º “hash marks” at each end of the dimension string indicating where the measurement starts and ends
Is there room for furniture around it? I like the way the great room fireplace in modern prairie style, below is part of a wall with built-in storage for media and books. A fireplace too close to a doorway is not very useful.