Hollow Metal Frame with a 4″ Head 07/12/2025|Admin|Product Highlights, Resources When to Use a 4″ Head on Your Door Frame In commercial construction, small details in frame design can make a big difference during installation. One example is knowing when to use a 4″ head on your hollow metal door frame. When installing a 7’0″ door, using … Continue reading When To Use a Hollow Metal Frame With a 4″ Head