# Bilco | STKWL | Bilco STKWL, STKWL-C null

```Selecting the Proper Size StakWEL® Egress Window Well
STEP 1:
Measure and calculate dimension A
as shown in the detail on the right
based on the site's grade conditions
and foundation height.
STEP 2:
Determine the required window well
height by performing this simple
calculation:
Required Window Well Height
l= Dimension A + 7-1/2"
From the first column in the table
below, select the closest height that
will meet the site conditions.
STEP 3:
Once the height has been
the number of modules required for
StakWEL® STANDARD SIZES AND MODEL NUMBERS
Modules
Height
Width
Keyhole on
Center
Dimension
Projection
from
Foundation
Optional
Dome
Cover
stkwl
1 module = 21"
54"
58"
40-1/4"
stkwl-C
stkwl
2 modules = 36-3/8"
54"
58"
40-1/4"
stkwl-C
stkwl
3 modules = 51-3/4"
54"
58"
40-1/4"
stkwl-C
stkwl
4 modules = 67-1/8"
54"
58"
40-1/4"
stkwl-C
stkwl
5 modules = 82-1/2"
54"
58"
40-1/4"
stkwl-C
stkwl
6 modules = 97-7/8"
54"
58"
40-1/4"
stkwl-C
Note: StakWEL
Window Wells cannot
be used with 60" wide
windows
StakWEL modules are designed
for use on 36" and 48"
windows only (See ScapeWEL
model for 60" window
installations).
BILCO Egress Window Wells satisfy International Building Code requirements for
Emergency Escape and Rescue Openings per section R310.
6/9/17
```