Installation Guide
90
RAILING
90
TREX
®
 SIGNATURE™ RAILING
Attachment of Bracket Covers, Skirts, and Caps
16.   Attach corresponding bracket covers over opening in 
upper and bottom rails.
17.   Attach provided post skirt to bottom of posts when 
using Trex
®
 Signature™ posts. 
18.  Attach post caps to Trex
®
 Signature™ posts.  
(Use of rubber  m a l l e t  may be required for secure 
attachment.)
19.     Attach post caps to post sleeves using external 
grade PVC construction adhesive.
20. Attachment of Foot Block
   See instructions on page 104.
HOW TO INSTALL HORIZONTAL RAILING POST TO POST/CONTINUED 
TREX
®
 SIGNATURE™
®
1
18
Trex
Signature
™
post
2
Post
sleeve
19
3
1
1
17
Trex Signature™
 post
®
2
1
2
16
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-CROSSOVER 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.
» AT ALL FINAL END POST CONFIGURATIONS, 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, Mark and Cut Bottom and Top 
Railings (When Required) 
Important: DO NOT cut top rail the same length as 
bottom rail.
 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.
HOW TO INSTALL HORIZONTAL RAILING POST TO CROSSOVER POST 
TREX® SIGNATURE™
1
Top rail
Center slot 
for fixed 
baluster
Bottom rail
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.










