alprendes is incorrectly written, and should be written as "porches" being its meaning:
alprendes = alpendresplurall of alpendrealpende or alpendre.1. cantilever deck m. of any building, and especially the sustained by Poles or columns, a way of portico.2. m. In mines or in public works, box store enseres.3. m. shed ( 41 covered site.