y 240

r1 x 37-100-71
   z 24-96     21-30-x

r2 x 124-20-86-20-60
   z 180

r3 x 90 , 80
   z 280 (-90), 180-75

r4 x 370 (-15)
   z 500
fireplace
z 400
x 45 +-5

z 60,y35
z 184, y5 & y90
z180, y35