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Usually the critical loading cases for conventional arches are when the loading becomes asymmetrical, for example when one side becomes unloaded. This does not happen with a restrained Xanadome. Removing load simply reduces forces throughout.

Xanadomes may use their cable network as part of their erection system. Provided that some temporary light cable bracing is provided, they can be assembled on the ground and pulled up using a hawser and a temporary lightweight erection mast. Consequently, the restrictions on size dictated by existing cranes or by scaffold costs are by-passed making very large spans economically viable. Erection is cheaper and safer than conventional arches.

All structures have a maximum size, above which they are not strong enough to support their own weight. This limit is reached much earlier with inefficient structures. Efficient structures can therefore be much larger than other structures. Long before the limit is reached, inefficient structures cease to be economically viable. Xanadomes remain viable to very large spans (exceeding a kilometre). Spans of a mile are feasible.

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