Installation Guide
87
TREX
®
 SIGNATURE™ RAILING
NOTES:
» TREX
®
 SIGNATURE™ RAILINGS ARE DESIGNED TO BE ATTACHED WITH 
POSTS INSTALLED AT A CLEAR SPAN OF 6' (1.83 M) OR 8' (2.44 M). 
» IF INSTALLING AT EXACT SPAN LENGTHS OF 6' (1.83 M) OR 8' 
(2.44 M), AND USING POST-TO-POST CONFIGURATION, THE BOTTOM 
RAIL WILL NOT NEED TO BE CUT, BUT THE TOP RAIL WILL NEED TO BE 
MEASURED (MAKING SURE BALUSTERS LINE UP VERTICALLY) AND CUT. 
» FOR ODD SPAN LENGTHS, BOTH TOP RAIL AND BOTTOM RAIL 
WILL NEED TO BE MEASURED (MAKING SURE BALUSTERS LINE UP 
VERTICALLY) AND CUT. ENSURE THAT BALUSTERS ARE SPACED WITH 
AN EQUAL DISTANCE ON EACH SIDE OF THE POST.
» WHEN RAILINGS ARE CUT TO ODD SPANS, ALL SPANS GREATER THAN 
5' (1.52 M) (EXAMPLE: 8' (2.44 M) SPAN CUT INTO ONE 5' 
(1.52 M) SPAN AND ONE 3' (0.91 M) SPAN) WOULD REQUIRE FOOT 
BLOCK UNDER 5' (1.52 M) SPAN SINCE SMALLER FIXED BALUSTER IS NO 
LONGER CENTERED.
How to Measure and Cut Bottom and Top Railings 
(When Required) 
1.   Position bottom and top rails between posts and 
align with bottom bracket. Align the center baluster 
slot in both rails with the middle of the span 
between posts.* This will allow an equal number 
of baluster holes on each side of center slot. Mark 
bottom rail and top rail at each end (ensure both 
rails are centered between posts).
* In some cases, due to odd railing spans, the center baluster may 
need to be offset in one direction to ensure there is enough room at 
both post locations for balusters to be placed. Review this BEFORE 
cutting any railings to ensure all balusters are equally spaced.
Cutting Bottom Rail and Bottom Rail Cover  
2.   Cut each end of bottom rail 1/4" (0.6 cm) shorter 
than mark on each end to allow for fit into bottom 
rail brackets.
3.   Slide rail insert out and cut 3/4" (19 mm) FROM 
EACH SIDE of insert, then slide back inside rail 
and center.
4. Mark and cut bottom 
rail cover 1-1/2" 
(38 mm) shorter than 
bottom rail.
HOW TO INSTALL HORIZONTAL RAILING POST TO POST 
TREX
®
 SIGNATURE™
1
Top rail
Center slot 
for fixed 
baluster
Bottom rail
2
1/4"
(0.6 cm)
1/4"
(0.6 cm)
1/4"
(0.6 cm)
1/4"
(0.6 cm)
KEY
Mark
Cut
KEY
Bottom rail
3
3/4 "
(1.9 cm)
3/4 "
(1.9 cm)
3/4 "
(1.9 cm)
3/4 "
(1.9 cm)
Bottom rail
1-1/2"
(3.8 cm)
1-1/2"
(3.8 cm)
4
Bottom rail
Bottom 
rail cover










