Heavy Duty Avalon Structural Post with Base Trim by RDI
Commercial Structural Post assembly for the Avalon Railing System
What It Is
The Commercial Structural Post Assembly for Avalon Aluminum Railing® is a heavy-duty post unit designed to support Avalon railing panels in applications where higher strength and durability are needed — such as commercial projects, multi-family buildings, or residential installations with stricter load requirements.
This post assembly includes built-in structural elements and finishing accessories so you get both load-bearing capacity and a finished look that matches the rest of the Avalon system.
What’s Included
- Powder-coated aluminum structural post — thicker wall for increased strength
- Surface mount base plate — welded to the post for secure deck attachment
- Metal sandwich plate — adds rigidity and distributes load at the base
- Post cap — weather-resistant aluminum cap that tops the post
- Post trim cover (2 pc) — hides hardware and creates a clean vertical look
- Installation instructions — for proper anchoring and alignment
Because it comes as a complete assembly, you don’t need to piece together trims, caps, and plates separately — this is especially helpful on commercial or high-traffic installations.
Size & Strength
Commercial structural posts use a stronger wall thickness than regular Avalon posts — around 0.160″ wall thickness — which helps them meet higher structural requirements.
Standard sizing available includes:
- 2.5″ × 2.5″ aluminum post profile
- Heights such as 45″ (for 36″ finished rail) and 60″ (for 42″ finished rail) depending on code requirements and application.
These posts include the same polished trim and post cap finishes offered in the Avalon railing line, so the look remains consistent with residential installations even in commercial settings.
DETAILS:
- Wall thickness ~ .160
- Size ~ 2.5 x 2.5 x 45" or 60"
- Mounting bolt hole size ~ .44"
- Base plate thickness ~ 5/16"



