Backyard Bird Feeder

Catenary Arch Suspension Bridge Seed Span

A miniature architectural marvel designed as an elegant suspension bridge that allows birds to feed from a central hanging trough.

Catenary Arch Suspension Bridge Seed Span

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Catenary Arch Suspension Bridge Seed Span — step 1
Step 1

Construct the dual main support towers using laminated hardwoods shaped into tapered spires. Secure these uprights onto a heavy base plate to ensure the structural integrity needed to support the tension of the suspension cables.

Catenary Arch Suspension Bridge Seed Span — step 2
Step 2

Fabricate the main seed trough using a CNC-routed mahogany channel lined with a removable acrylic insert for easy cleaning. Attach stainless steel cable anchors to the outer edges of the trough at precise, symmetrical intervals.

Catenary Arch Suspension Bridge Seed Span — step 3
Step 3

String high-tensile braided fishing wire between the tower tops and the trough edge anchors to create the suspension span. Carefully adjust the tension on each line to mimic the natural catenary curve of a real-world bridge.

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Catenary Arch Suspension Bridge Seed Span — step 4
Step 4

Apply a marine-grade spar varnish to all wood surfaces to protect the intricate details from moisture and sun. Mount the final assembly using a hidden swivel bracket to allow the bridge to gently sway with the breeze.

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