Arch 1 x 12 x 3 Raised Arch with 5 Cross Supports

The LEGO® Arch 1 x 12 x 3 Raised Arch with 5 Cross Supports (Part 18838) is a large architectural element designed to span wide openings in LEGO builds. Its raised profile and reinforced structure make it ideal for bridges, gateways, tunnels, and large decorative arches in custom creations.

Key Features

• Large raised arch design suitable for bridges, tunnels, and architectural entrances.
• Five cross supports add structural strength and visual detail.
• 1 x 12 width allows wide openings in castles, city layouts, and landscape builds.
• Compatible with standard LEGO® bricks and plates for stable integration into custom models.

Building Ideas

This raised arch piece is frequently used in castle walls, train bridges, aqueducts, and large architectural structures. Builders also use it for cathedral-style windows, decorative façades, and grand entrances in historical or fantasy-themed MOCs.

Because of its wide span, the element works well for bridges over rivers, train tunnels, and large structural openings where smaller arch pieces would not provide enough width.

Browse more elements in our LEGO® Arch Pieces collection.