Installation Guide
111
TREX
®
 SIGNATURE™ RAILING
ATTACHING STAIR SWIVEL/COMPOUND SWIVEL BRACKETS AND 
RAILS TO TREX
®
 SIGNATURE™ POSTS AND PRESSURE-TREATED POST 
AND POST SLEEVES
TREX
®
 SIGNATURE™
NOTES: 
» Illustrations shown are representations when using 
Trex® Signature™ post, but same rules apply if using 
pressure-treated posts and post sleeves.
» Use a clamp to help hold stair brackets in place while 
fastening with screws.
  IMPORTANT NOTE: 
» BEFORE ATTACHING ANY UPPER BRACKETS, MAKE   
  SURE PROPER RAILING HEIGHTS ARE ACHIEVED. 
  RAILING HEIGHTS AND UPPER BRACKET HEIGHTS 
  MAY NEED TO BE ADJUSTED, HOWEVER, DO 
  NOT REDUCE HEIGHTS BASED ON YOUR RAILING 
  CODE REQUIREMENTS. MEASURE CAREFULLY AS 
  DIMENSION HEIGHTS MAY NEED TO BE ADJUSTED!
1.   Lay bottom stair rail on steps beside posts. 
Position bottom rail at least 1" (2.5 cm) above nose 
of stair tread. 
TIP: Use a 1" (2.5 cm) deck board as a spacer board and 
clamp rails to post. Mark where lower brackets are to 
be attached to both posts. Mark at underside of railing 
location.
Installing Lower Stair Swivel and Compound Swivel 
Brackets 
2.   Center lower stair swivel bracket on post above 
the marked line and attach using four self-tapping 
screws (provided). In some cases it may be difficult 
to attach the stair bracket on the lower stair post. A 
90° cordless drill is recommended to attach screws 
in this area (if possible).
How to Measure Bottom Stair Railings
(WHEN REQUIRED) 
3.   With brackets in correct swivel locations, measure 
distance from inside of swivel bracket to inside of 
swivel bracket. Ensure that before cutting, balusters 
holes are parallel and centered in between the 
posts and also allow for clearance for attachment to 
brackets. Mark bottom stair rail at each intersection.
Cutting Bottom Stair Rail, Bottom Stair Rail Cover, 
and Attachment of Bottom Stair Rail Cover
4.     Cut each end of the bottom rail, rail insert, and 
bottom rail cover at the mark on each end to allow 
for fit into bottom stair rail brackets.
NOTE: Railing does not need to be cut at angle.Brackets 
are designed to allow for railing to be installed with 
standard straight cut.
1" 
(2.5 cm)
1
1
2
Mounting HolesMounting Holes
2
3
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