Arc

assembly structure shelter

A tube-and-connector arch — a passage, a gateway, or shade across a span. Built flat from the 1,33 m module, then tilted upright.

• Type: Structure
• Status: In use
• Primary function: arch / passage / shade

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Everything you need to build one arc. All tubes diameter 50 x 2 mm wall. Click a part for specs and handling.

• Connector nodes: 28 (each = 2x T + 1x X)
• Tubes total: 75 - tube length: 116,78 m
• Tube weight: 95,1 kg - connector weight: 30,0 kg - total: 125,0 kg

Source: MoBil builder. Locking-pin count and panel type to confirm.

The arc is built flat as the profile of the arch, then tilted upright. Each node = the connector assembly (2x T + 1x X), joined by tubes.

1. Lay out the contour. Set connectors flat on the ground in the arch profile.
2. Connect with tubes. Join the nodes.
3. Build up. Add all vertical and diagonal tubes, with connectors on top.
4. Close the top surface. Cap with connectors.
5. Tilt 90. Stand the arch upright on its hinge.
6. Add panels to the bases.

Each step maps to a stage in the viewer above.

• Pinch points at every connector - keep fingers clear when seating joints.
• Don't hammer pins with the frame unsupported; seat the joint by hand first.
• Tilting the span upright needs enough hands - never lift it short-handed.

• Max vertical load (stage/roof): . kg (to define / test)
• Do not climb the frame unless rated and ballasted.
• Wind: above . km/h, remove banners/roof and ballast or take down. (define - sail-bearing span)
• Never leave a tall configuration up unattended in changing weather.

• Footprint anchoring with water weights at the base corners for any raised or sail-bearing configuration.
• Ropes to fixed points where available.
• Minimum ballast: 15 kg per corner ont he ground.

1. Remove add-ons and ballast first.
2. Tilt the frame back down flat before breaking joints.
3. Pull top pins, lift off the top surface.
4. Pull verticals and diagonals.
5. Break the base. Nodes can stay assembled for next time, or break to flat-pack.

• Packs into: normal bike trailer (tubes + euroboxes for connectors).
• Store dry. Check pins aren't bent before repacking.

What this arc accepts:

• Roof
• Banners

• Photos - Drawings - Exploded diagram
• Linked: Connector (the core joint)

Designed by . - Year . - Iteration . - Last updated: .