How should individually dogged doors be opened?

• A. From the top hinge first
• B. From the handle first
• C. Hinged side first, starting at the bottom
• D. From the bottom and roll upward

Answer: (C)

Opening individually dogged doors by starting on the hinged edge and at the bottom gives you a controlled, stable release along the door’s pivot. The hinge line provides a natural guide and keeps the door aligned as you detach each dog. Beginning at the bottom allows the door to tilt away from the frame gradually, reducing the chance of binding or tearing the gasket as pressure is relieved and the door begins to swing. If you try to lift from the top or from the non‑hinged edge first, the door can bind, snap, or push awkwardly against the frame, increasing the risk of damage or water/air leakage. So, hinge side first, starting at the bottom, provides a safer, smoother, and more reliable opening sequence.