A heavy-duty jamb latch for securing sliding doors to a rough opening of a building or structure includes a base plate, a handle, side plates adjacent and pivotably connected to the base plate, a carrier pin passing through recesses in the base plate and apertures in the side plates, and rigid members fastened to the carrier pin via bores drilled into the carrier pin. The rigid members extend away from the handle and secure sliding doors to a rough opening of a building or structure. The heavy-duty jamb latch may be mounted to the rough opening of the building or structure and may transition from an open position to a closed position by pulling the handle, thereby securing the sliding doors to the rough opening of the building or structure. Additionally, a locking pin or a padlock may lock the heavy-duty jamb latch.