object
Lewis
A named dovetailed lifting device seated in a prepared hole to hoist ashlar. Not a personal name dump, not plug-and-feathers, and not a bare hook.
Also known as Lewis bolt · Lewis pin · Lifting lewis
object
A named dovetailed lifting device seated in a prepared hole to hoist ashlar. Not a personal name dump, not plug-and-feathers, and not a bare hook.
Also known as Lewis bolt · Lewis pin · Lifting lewis