Installation Guide
143
SELECT RAILING
TREX SELECT RAILING
NOTES:
» All Trex Select Railing lengths are manufactured at ON CENTER dimensions (spanning from center of each post): 67-5/8" (176.8 cm) for  
6' (1.83 m) on center, and 92-5/8" (235.3 cm) for 8' (2.44 m) on center. Note that railings are designed to be slightly longer that required to 
allow for very slight play in post placement – trimming may be required. IT IS VERY IMPORTANT TO MEASURE FIRST.
» SEE PAGE 61 FOR SKU NUMBERS.
PARTS
A. Select top rail
B.  Select bottom rail
C. Brackets
D. Balusters
E. Adjustable foot block
F. Post sleeve cap*
G. Post sleeve skirt*
H.  Post sleeve – 4" x 4" (102 mm x 102 mm) or 
6" x 6" (152 mm x 152 mm) post sleeve)**
I.  Trex decking
J. Trex fascia
K.  Code-approved wood joist – 2" x 8" 
(51 mm x 203 mm)
L.  Code-approved wood rim joist – 2" x 8"
 (51 mm x 203 mm) or larger 
*   Item not included in the Select railing kits.
** Both 4" x 4" (102 mm x 102 mm) and 6" x 6" (152 mm x 152 mm) 
post sleeves are designed to fit over 4x4 pressure-treated post.
A
B
C
C
D
F
*
G
*
H
**
I
J
K
L
E
O
NOTE: Pictorial representations shown may only show one style of 
railing, while others may also be used. Review detailed instructions 
to determine what railing styles and combinations can be used.
NOTE: If installing 42" (1067 mm) railing, use longer posts sleeves 
and measure accordingly to ensure a proper cut (DO NOT CUT 
POST SLEEVES TO ACTUAL 42" – THESE NEED TO BE LONGER 
TO ALLOW FOR POST CAPS TO FIT).
DETERMINING BALUSTERS NEEDED
Baluster Type
Per 6' OC 
Section
Per 8' OC 
Section
Round Aluminum Baluster 
(Horizontal Application)
14 20
Round Aluminum  
Baluster(Stair Application)
12 16
CODE APPROVED APPLICATIONS
6' Railing 8' Railing
< 30" height decking
Acceptable
(Code approval
not applicable)
Acceptable
(Code approval
not applicable)
IRC Compliant
Yes No
IBC Compliant
No No
NOTE: 
If using 8' railings, the Trex Select® 8' Aluminum Rail 
Stiffener (sku SELALRAILSTIFFENER) can also be used to allow 
for the rail to be stronger if required.










