TREX ® JOIST MOUNT POSTS Installation Guidelines
JOIST MOUNT POSTS Note: All instructions below are for metal posts only; no pressure treated posts are to be used for these instructions.
Joist Mount Post for Trex Composite Post Sleeve
Trex Joist Mount Post for Trex Signature Railing ® SKU XXJMNTPOST63 XX denotes color: (BK-Black, BZ-Bronze, WT-White) » (1) Joist Mount Post » (2) 1/2" x 8" Bolts, Washers, & Nuts*
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E
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SKU CPJMNTPOST63 » (1) Joist Mount Post » (2) Guide blocks » (2) 10 x 1" (2.5 cm) Self-tapping screws » (18) #8-15 x 1-1/4" (3.2 cm)Self-tapping screws » (2) 1/2" x 8" Bolts, Washers, & Nuts
Simpson LUS28Z** (or similar)
Simpson DTT2Z**
Simpson ML26Z** (or similar)
Simpson L70Z** (or similar)
» (1) Post Cap » (1) Post Skirt
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F
*Note: bolt heads, washers, and nuts are color matched to joist mount post color
*Note: If using 6x6 post sleeves, attach designated railing brackets us- ing #8-15 x 1-3/4" (4.4cm) 316 stainless steel self-tapping screws (not provided). Pre-drilling IS REQUIRED when attaching brackets to designated posts. Use a 9/64" (3.6 mm) drill bit.
Trex Fascia Mount Corner Bracket Kit (Brackets, Bolts, Nuts, Washers, & Screws) SKU - XXCORNERFMNTWOOD
Trex Signature ® Fascia Mount Kit SKU - XXFMNTWOOD
XX denotes color BK-Black, BZ-Bronze, WT-White
GENERAL GUIDELINES
» Code Approved Joist Mount Post Applications: - 30" or less deck height - Code approval not applicable
» Included template works for most, but not all, applications. Review instructions carefully prior to drilling holes, making sure to center holes on post. » **Simpson structural brackets are not included with joist mount posts and must be purchased separately.
- IRC Compliant - Yes - IBC Compliant - No
» Minimum framing is 2"x 8" (51 mm x 203 mm) (ensure all structural brackets are sized appropriately for framing). » Follow all structural bracket manufacturer's guidelines for fastener selection and corrosion protection requirements. » Maximum OC framing is 16" (406 mm). » This post is designed to cut-to-length and will accommodate up to 42" (1067 mm) stair railing on 2" x 12" (51 mm x 305 mm) framing.
HELPFUL TOOLS
9/16" x 6" (14 mm x 152 mm) or longer Drill Bit
1/2" (13 mm) Step Bit
Non-ferrous Metal Cutting Blade
Wood Frame (Inside Mount) Overview
Wood Frame (Fascia Mount) Overview
NOTES: » Trex fascia should be installed prior to installing any outside joist post mounts » Can only be used with Trex ® Signature™ 6' or less railing spans.
NOTE: To allow fascia to sit flat against framing, route/trim out back side of fascia to allow for fit over bolt locations .
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TREX ® JOIST MOUNT POSTS Installation Guidelines
INSIDE MOUNT (FRONT RIM PLATE - BETWEEN JOISTS WITH BLOCKING)
Simpson ML26Z
Blocking 2"x 8" (51 mm x 203 mm)
Simpson L70Z
Simpson LUS28Z
Trex Bolts 1/2" x 8" (13 mm x 203 mm), Nuts, and Washers
INSIDE MOUNT (FRONT RIM PLATE - NEXT TO JOIST)
TOP VIEW
Front Rim Joist
NOTE: If a joist hanger is in this location, it must be removed so post mount will fit properly.
Post
Simpson L70Z
Simpson DTT2Z
Simpson LUS28Z
Trex Bolts 1/2" x 8" (13 mm x 203 mm), Nuts, and Washers
SIDE VIEW
Post
Front Rim Joist
Simpson DTT2Z
Simpson DTT2Z
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INSIDE MOUNT (SIDE JOIST)
» TREX SUPPLIES (2) HG 1/2" x 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS. » CUSTOMER MUST SUPPLY ADDITIONAL HG 1/2" X 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS.
Simpson L70Z
Simpson DTT2Z
Blocking 2 " x 8 " (51 mm x 203 mm)
Simpson LUS28Z
Trex Bolts 1/2 " x 8 " (13 mm x 203 mm), Nuts, and Washers
SIDE VIEW
Bottom bolt runs under the 2 " x 4 " (51 mm x 102 mm) crush block
Simpson DTT2Z
Crush Block 2 " x 4 " (51 mm x 102 mm)
Crush Block
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TREX ® JOIST MOUNT POSTS Installation Guidelines Installation Guidelines
INSIDE MOUNT (CORNER)
» TREX SUPPLIES (2) HG 1/2" x 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS. » CUSTOMER MUST SUPPLY ADDITIONAL HG 1/2" X 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS.
Blocking 2 " x 8 " (51 mm x 203 mm) min
NOTE: If a L70Z is in this location, it must be removed so post mount will fit properly.
Simpson DTT2Z
Front Rim Joist
Blocking 2 " x 8 " (51 mm x 203 mm)
Trex Bolts 1/2 " x 8 " (13 mm x 203 mm), Nuts, and Washers
NOTE: 1/2” x 8" (13 mm x 203 mm) bolts must be wider (vertically) on front rim and narrower on side joist to avoid contact inside the post.
Simpson LUS28Z
Simpson L70Z
Simpson DTT2Z
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COMPOSITE POST SLEEVE APPLICATIONS Installation of Guide Blocks and Railing
» If using the joist mount post with composite post sleeve, quantity of 18 self-tapping screws are provided to cover all types of Trex railing bracket installations (Trex Signature, Transcend and Select). Depending on the type railing being installed, you may have screws that are not used. » If using 6x6 post sleeves, attach designated railing brackets using #8-15 x 1-3/4" (4.4 cm) 316 stainless steel self-tapping screws (not provided). » P re-drilling IS REQUIRED when attaching brackets to designated posts. Use a 9/64" (3.6 mm) drill bit to predrill at specified locations according to instructions provided with railing kits.
NOTE: Pre-drilling is not required but is optional for attachment of guide blocks to post. Use a drill bit slightly smaller in size than that of screw being installed.
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notch
1. P lace or rest bottom aluminum guide block on bottom of post. Place guide on post so that notch is on a side that does not require railing to be attached. 2 A ttach bottom guide block using one 10 x 1 " self tapping screw (provided) in notch to lock guide block onto post.
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notch
3. L ocation of top guide block will vary slightly based on type and height of railing being installed. Determine this measurement and place top guide block in location where top bracket for desired railing would be approximately on center of the top railing bracket location. 4. A ttach top guide block using one 10 x 1 " self tapping screw (provided) in notch to lock guide block onto post.
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TREX ® JOIST MOUNT POSTS Installation Guidelines Installation Guidelines
FASCIA MOUNT (FRONT RIM PLATE - NEXT TO JOIST)
» FOR USE WITH TREX ® SIGNATURE™ 6' RAILING SECTIONS ONLY. » TREX SUPPLIES (2) HG 1/2" x 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS.
TOP VIEW
Trex Fascia
Post
Front Rim Joist
Trex Fascia Mount Kit (L Bracket)
Simpson DTT2Z
Trex Bolts 1/2 " x 8 " (13 mm x 203 mm), Nuts, and Washers
NOTE: If a joist hanger is in this location, it must be removed so post mount will fit properly.
Simpson LUS28Z
Simpson L70Z
SIDE VIEW
Simpson DTT2Z
Post
Trex Decking
L-Bracket
Trex Fascia
Simpson DTT2Z
Front Rim Joist
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FASCIA MOUNT (SIDE JOIST - WITH BLOCKING)
» TREX SUPPLIES (2) HG 1/2" x 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS. » C USTOMER MUST SUPPLY ADDITIONAL HG 1/2" X 8" (13 mm x 203 mm) BOLTS, NUTS, AND WASHERS.
Simpson DTT2Z
TOP VIEW
Side Rim Joist
Trex Fascia
Blocking 2 " x 8 " (51 mm x 203 mm) min
L-Bracket
Trex Fascia Mount Kit (L Bracket)
Trex Bolts 1/2 " x 8 " (13 mm x 203 mm), Nuts, and Washers
Simpson L70Z
Post
Simpson LUS28Z
Blocking 2 " x 8 " (51 mm x 203 mm) min
SIDE VIEW
Post
Blocking 2 " x 8 " (51 mm x 203 mm) min
Simpson DTT2Z
L-Bracket
Simpson DTT2Z
Trex Fascia
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TREX ® JOIST MOUNT POSTS Installation Guidelines Installation Guidelines
FASCIA MOUNT (OUTSIDE FRAME CORNER)
» 3/4" (19 mm) FASCIA MUST BE USED, OR BOLTS MUST BE CUT DOWN. » INSTALL POST TIGHTLY ON RIM JOIST FIRST – NUTS WILL BE INACCESSIBLE LATER. » MUST USE TREX FASCIA MOUNT CORNER BRACKET KIT .
Trex Fascia Mount Corner Bracket (Kit)
Trex Fascia Mount Kit (L Bracket)
3/4" (19 mm) Fascia
3 Bolts 1/2" x 6" (13 mm x 152 mm), Nuts, and Washers
1 Bolt 1/2" x 10" (13 mm x 254 mm), Nut, and Washer
NOTE: If a L70Z is in this location, it must be removed so post mount will fit properly.
Simpson L70Z
Simpson LUS28Z
Front Rim Joist
Side Joist
Simpson DTT2Z
1. Install post on rim joist and fully tighten using Simpson DTT2Z on top bolt. 2. Run 10 " (254 mm) bolt through gap in existing Simpson DTT2Z and tighten into second DTT2Z. 3. Install bottom bolt. TREX SIGNATURE RAILING APPLICATIONS Installation of Railing 1. A ll required hardware is included with Trex Signature railing. Follow Trex Signature railing instructions for complete installation requirements.
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