Internal Hinges are operated and located on the inside of the safe and attached to the safe body. External Hinges like those on a Sun Welding Safe are operated and located on the outside of the safe and attached to the safe body.
BENEFITS of EXTERNAL HINGES Fully welded external hinges which include bolts on at least 2 sides of the inside of the door to prevent removal of door even if the hinges are tampered with. External hinges provide a wider door swing (180˚), thus allow for more access to the inside of the safe.
DISADVANTAGES of INTERNAL HINGES Internal hinges provide a 90˚ door swing, thus allow less access to the inside of the safe. Large pockets of fire board are cutout to make room for the hinge on the inside of the safe. There is no fire protection in this area of the safe.
Sun Welding uses a 3/16" solid steel door frame on all of our models, regardless of what the door material thickness is made out of.
Most of our competitors frames are made of the same thickness as the body of the safe. If your safe has a 12 body, it will most likely have a 12 gauge form bent frame.
Sun Welding uses a 3/16" solid steel body frame on all of our safes, regardless of what the body material thickness is made out of.
The bolt down hole size in the safe is 5/8" in diameter. Two, bolts are needed. No need to premark the spots before bolting, just set the safe in place and bolt down. We recommend using lag screws, be sure they are at least 3/8" thick. Rent or borrow a high speed drill. Air flow is important when bolting down to concrete because you don't want moisture to collect, so be sure to push the safe back far enough to just slide a 1/4" thick washer or nut on each corner of the front safe. Make sure whoever gives you the roto hammer shows you how to operate it. Different anchor bolts can be used that would work for this application. It is up to you to decide what bolt is best for you.