Dimensions Guide

3
Basement Door Measuring Guide
Followtheinstructionsbelowtocalculatethepropersizedoorforyourareaway.Anelectronicversionofthis
sizingguideisalsoavailableatwww.bilco.com.PleasecontactBilcoifyouareunabletondastandarddoorto
tyourareaway.
Ultra Series and Classic Series Sided Doors
1. Discardyourolddoorandmeasure(ininches)
 thedimensionsoftheareawayfoundation.
2.MeasuredimensionW1,theinsidewidth,and
 dimensionW2,theoutsidewidthoftheareaway
 foundationwalls.Recordyourdimensionsand
 makethecalculationshown.
3.MeasuredimensionL1,theinsidelength,and  
 dimensionL2,theoutsidelengthoftheareaway  
 foundationwalls.Recordyourdimensionsand
 makethecalculationshown.
4.MeasuredimensionH1,theheightfromthetopoftheareaway
 foundationtothetopoftheopeninginthehousefoundation.
5. Selectthedoorfromthetable
 totherightwithawidth
 betweenW1andW2and     
 lengthbetweenL1andL2.
H
L
W
Record your foundation dimensions here
Width
W1 + 4” = _____
W2 = _____
Length
L1 + 2” = _____
L2 = _____
Height
H1 = _____
Size
(inches)
Width
(W)
(inches)
Length
(L)
(inches)
Height
(H)
(inches)
Door Opening
Length
(inches)
Width
(inches)
B 51 64 22 60 44
C* 55 72 19½ 67 48
O 47 58 30 58 40
SL 51 43¼ 52 60 44
Basement Door Dimensions
*Ultra Series Doors are available in Size C only
Extensionsareavailabletoincrease
thedoorlengthforSizeCUltraand
ClassicSeriesdoors.Classic Series
extensionsareavailablein6”,12”,18”,and24”lengths.
Ultra Seriesextensionsareavailablein6”and12”lengthsonly.
Twoormoreextensionscanbemountedbacktobackforlongerextensions.
Classic Series Sloped Wall Doors
1. Discardyourolddoorandmeasurethedimensions
 oftheareawayfoundationasshown.
2.MeasuredimensionW1,theinsidewidth,and
 W2,theoutsidewidthofthefoundationsloped
 sidewalls.Wallsmaynotbeuniformlyspaced,
 socheckatseveralpointsforthenarrowestdimension.
3.MeasuredimensionL1,theinsidelength,andL2,the
 outsidelengthoftheareawayfoundation.Recordyour 
 dimensionsandmakethecalculationshown.
4.SelectthewidestandlongestSLWDoor
 fromthetabletotherightthatwillt
 betweenthefoundationsidewalls.
 Framelengthshouldbe
 betweenL1+2”and
 L2.Frame      
 lengthcan
 beextended
 withoptional
 extensionpanels.
Width
W1 (minimum) = ______
W2 = ______
Length
L1 + 2” = _______
L2 = _______
Record your foundation dimensions here
For inside
width (inches)
(W1) of:
Select Door
Model
*Outside
Width (W)
(inches)
**Length (L)
min – max
(inches)
Door Opening
Length
(inches)
Width
(inches)
36-41 SLW3641 45¼ 65¼-67¾ 57 30
46-51 SLW4651 55¼ 65¼-67¾ 57 40
47-51 SLW4751 55¼ 74½-77 67 40
50-55 SLW5055 59¼ 67¾-70¼ 60 44
54-59 SLW5459 63¼ 74½-77 67 48
Sloped Wall Basement Door Dimensions
*Theframeofthedoormustoverlapthefoundationsidewallsbyatleast2”oneachside.
**TheSLWdoorlengthisadjustableforinstallationexibility.
Extensionsareavailabletoincreasethedoorlengthin6”and12”sizes.
Twoormoreextensionscanbeover-lappedtomakelongerextensions.
L
W