K
L
J
EXTERNAL ROOF
E
I
H
G
M
K2
K1
K3
D
K4
K5
K7
K6
K9
K8
K11
K10
*
N
O
C
B
K12
K13
K14
A
F
K15
*
This is the reference point (0,0) for the location
of all other columns.