5x5 in. Base Plate - Black

A 5×5 in. 3×3 aluminum post base plate

The 5×5 in. Base Plate from Aluglobus Aluminum Systems is a 3×3 aluminum post base plate, listed in the price list as the 5×5 in. Base Plate for 3×3 in. HD Post. It lets you surface-mount a 3×3 in. square post rather than setting it in a concrete footing. Like the posts it supports, it is 6063-T6 aluminum finished in black AAMA 2604 super-durable powder coating.

Where it fits in a gate project

In the pedestrian gate post options, the 3×3 in. Heavy Duty Square Post (.090 Thk) with screw bush is listed for concrete footing or baseplate, and this 5×5 in. plate is listed right beside it as the base plate option. The same post and plate are paired again in the gate kit sections of the price list, so this is the standard base for a 3×3 in. gate post. The sliding gate kits also list a 3 in. square post for concrete footing or wall. Use the plate where you are mounting onto an existing slab or wall rather than digging a footing.

Matching 3×3 posts

• 3×3 in. x 6ft. square post (.090 Thk)
• 3×3 in. x 8 ft. HD square post (.090 Thk)
• 3×3 in. x 12 ft. HD square post (.090 Thk)

All three are listed with screw bush, in Black, for pedestrian and sliding gates. Finish the top with a matching flat press cap. Order one plate per surface-mounted post; a single-swing gate typically needs a hinge post and a latch post, so check your layout.

Fasteners

No anchors or screws are listed with the base plate. The price list offers the 3/8″ x 3-3/4″ wedge anchor for fence base plates to concrete, and #14×2″ stainless steel screws listed as a fastener for the 3×3 HD post. Choose anchors that suit your surface and confirm the full set with our team.

Before you order

Gate posts carry more load than line posts, so check your gate width, the mounting surface and your local code before choosing surface mounting over a footing. If you are unsure whether a base plate suits your gate, send our team the gate size and site details and we will help you pick the post and base.