What are the limitations on such an “operable storefront”? There are none! Its 100% custom; designed and built to suit the specific needs of each customer. Some are framed in aluminum, some from steel tubing, and some from a combination of both. All are weld-assembled [for rigidity], receive full-sized panes [of safety glass] and full-height entrance doors. The sections can be made to swing in or open out on hinges (or pivots) or slide to one or both sides, hung from roller-trucks riding on concealed overhead tracks; we’ve built them many ways. Expensive to build/install? Maybe, but only once, as compared to renting secure parking for a business vehicle [monthly] or lost merchandise pilfered by passers-by while it awaits transfer to indoors [ongoing]. If you feel your business could benefit from this type of specialty-storefront, call or email us for a quote; we’ve “cornered the niche”, and we do it all, in-house.