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The AL13 Aluminum Support Block adds support and stability to your railing while bringing you peace of mind. Though completely optional, these support blocks give additional foundation to your aluminum railing and are recommended for 6 feet and 8 feet long sections.

These Support Blocks include installation screws and are available in coordinating Fortress finishes: Gloss Black and Gloss White.


DecksDirect # 5052

Fortress Warranty (245 KB) 

AL13 Pro Rail Installation (1024 KB) 


Gloss Black and Gloss White

Pack SizeEach
Material TypeAluminum
(width x depth x height)
4-1/8 in x 1 in x 3-3/4 in
Package Contents(1) support block, (4) installation screws
WarrantyView Fortress Warranty Information
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