Installation Guide
112
TREX
®
 SIGNATURE™ RAILING
ATTACHING STAIR SWIVEL/COMPOUND SWIVEL BRACKETS AND 
RAILS TO TREX
®
 SIGNATURE™ POSTS AND PRESSURE-TREATED POST 
AND POST SLEEVES/
CONTINUED
TREX
®
 SIGNATURE™
5.   Attach “flat" bottom stair rail cover to bottom stair 
rail. Align cover on one side of the bottom rail in slot 
on side of rail. Then starting from one end of rail 
snap cover onto opposing slot working down the 
length of the rail. In some cases, GENTLE tapping 
with a rubber mallet may facilitate fastening. 
6.   Set bottom stair rail into bottom stair rail brackets. 
Attach bottom stair rail to bottom stair bracket using 
two self-tapping screws (provided) on each side of 
bracket.
Installing Upper Brackets and Measuring Upper Stair 
Rail–Stair Swivel and Compound Swivel
IMPORTANT NOTE: BEFORE CUTTING ANY TOP 
RAILS MAKE SURE THAT WHEN MEASURING, ALL 
BALUSTER HOLES LINE UP PARALLEL!
7.   Place two balusters into 
lower rail at each end 
closest to post.
8.   
Position top stair rail onto balusters ensuring 
balusters are fully seated in top rail (position to side 
of post) and ENSURE that balusters are parallel with 
post.
Installing Upper Stair Swivel and Compound Swivel 
Brackets 
9.   
Clamp brackets to side of rail with brackets in correct 
swivel location/angle (this is important to ensure 
correct location of swivel brackets
).
1 0 .   
Mark a light line on posts at UNDERSIDE of where 
swivel bases (positioned correctly) meets the posts.
1
5
3
2
1
1
6
2
7
8
9
10
1
2
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.










