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Our Geodesic Dome Hubs are lightweight, but strong, due to the locking action in the outer collar that surrounds the hub.
The holes in the outer collar, in comparison to the diameter of the struts, are just the right size to lock the struts in the correct position for building the geodesic dome.
For the smaller 2v domes, the struts will need to move up to 18 degrees before the outer collar locks the struts into place.
For the 2v domes, the size of the holes in the outer collar will only allow the struts to move 18 degrees from the radial plane of the hub.
For the larger 3v domes, the curvature of the dome is more gradual, and the struts only need to move 12 degrees.
For the 3v domes, the holes are slightly smaller in the outer collar to give a tighter fit around the struts, so that the struts can only move up to 12 degrees from the radial plane of the hub before they lock into place.
The size of the holes in the outer "Locking Collar" locks the struts at the correct angles, and makes the geodesic dome much stronger than a regular hub.
The outer "Locking Collar" that surrounds the center ring hub is the reason our Dome Hub design can handle much more weight than other types of geodesic dome hubs.
Using only 120 lb Nylon Zip Ties, each of the dome hubs can support more than 200 lbs in weight. The strength of the dome is limited only by the stiffness of the PVC struts, and not the hubs.
For building the larger 3v domes, we provide 250 lb. Stainless Steel Zip Ties.
Our Dome Hub design can work with EMT conduit, metal pipe, and even metal rebar for building concrete domes.
For heavy duty concrete construction, we use U-Bolts instead of Zip Ties.
250 lb. Stainless Steel Zip Ties
The Patented "Locking Collar" works by moving the fulcrum away from the center ring hub and onto the collar, where the aperture size "locks" the strut at the correct angle. This makes the dome much stronger than a conventional hub.
The Locking Collar makes it impossible for the strut to shear off from the hub, as the Locking Collar keeps the struts from moving beyond the angle needed to support the dome.
The Locking Collar can be made in various shapes, and is the only design on the market that can utilize metal rebar struts for building concrete domes.
Our Locking Collar is a Universal Connector that can work as an addition to any other type of Geodesic Dome Hub to provide added strength.
The strength of the Locking Collar design allows us to use the most simple type of hub possible, such as a center ring with the struts connected together by zip ties. This type of hub would not be strong enough to work without the Locking Collar.
Our Patent Drawings
Our Geodesic Dome Hub Design using a "Locking Collar" is a novel and useful means for geodesic dome construction, which has allowed us to apply for patents as a new invention in various countries around the world.
Our invention of a "Locking Collar for Space Frame Construction" has been granted a Patent in 4 Countries: The United States, the United Kingdom, Australia, and New Zealand.
Other International Patents are in progress.