Installation Guide
101
SIGNATURE RAILING
IMPORTANT NOTES: 
» Only for use with pressure-treated 4 x 4 post 
(3.5" nominal square) and 4" x 4" (102 mm x 102 
mm) post sleeve. Trex Signature posts, Trex post 
mounts or joist mount posts cannot be used with 
Signature Cocktail stair railing. Cutting post and 
post sleeve only apply to the Cocktail style railing.
» DO NOT CUT POST/POST SLEEVES UNTIL TOP 
RAILING AND COVER IS FULLY INSTALLED.
» When referring to previous instructions referenced 
disregard all crossover post instructions as these 
cannot be used with Cocktail railing.
» THE DECK BOARD USED IN SIGNATURE COCKTAIL 
WILL NEED TO TERMINATE AT THE TOP OF THE 
POST AS SHOWN ABOVE. THE DECK BOARD WILL 
HAVE TO BE TOENAILED INTO THE SIDE OF THE 
POST IN THESE AREAS USING 2 APPROPRIATE 
COMPOSITE DECKING SCREWS – PREDRILLING 
IS RECOMMENDED.
Installing Pressure-treated Posts, Post 
Sleeves,and Skirts to Use with Signature Railing
1.   See instructions on page 74.
Installing Brackets
2.    Follow previous stair instructions for the installation 
of desired brackets making sure that all dimensions 
are calculated before installation to ensure deck 
board is placed in correct location.
See instructions on pages 93–94.
Cutting Bottom Stair Rail, Bottom Stair Rail 
Cover and Attachment of Bottom Stair Rail Cover 
3.   See instructions on page 95.
How to Measure Top Stair Railings 
(WHEN REQUIRED)
4.  See instructions on page 96.
Cutting Top Stair Rail and Rail Insert When 
using Fixed Stair Brackets
5a    Cut each end of top stair rail along with rail insert 
1/4" (0.6 cm) shorter than mark to allow for fi t into 
top stair rail bracket. 
NOTE THAT THE TOP 
RAIL WILL NEED TO BE 
CUT AT APPROPRIATE 
ANGLE ON THE END 
OF THE RAIL THAT 
CONNECTS TO THE 
UPPER FIXED BRACKET 
SO THAT WHEN THE 
RAIL IS INSTALLED IT 
SITS FLUSH WITH THE 
END OF THE BRACKET AS SHOWN.
Cutting Top Stair Rail and Rail Insert When 
using Upper Stair Swivel and Compound Swivel 
Brackets
5b. See instructions on page 98.
Cutting Top Stair Rail Cover, and Attachment of 
Top Stair Rail Cover 
6.   See instructions on page 99.
Installing Balusters into Bottom Stair Rail 
7.   See instructions on page 99.
Attaching Upper Stair Rails 
8.   See instructions on page 100.
HOW TO INSTALL SIGNATURE COCKTAIL STAIR RAILING
TREX SIGNATURE
5a
1/4"
(0.6 cm)
1/4"
(0.6 cm)
1/4"
(0.6 cm)
1/4"
(0.6 cm)
KEY
Mark
Cut
KEY
Top stair rail
Standard post
Standard post
Post
Top stair rail
Upper 
bracket










