Door question

The building construction will not allow me to move the man door to a different location without causing major problems, secondly I only need the larger door once in a while. I got to thinking about making a large double swing door section for this opening and hanging the existing man door within one of the larger doors. Thus, when bigger door is opened, the smaller door will swing with it.

Since I'm far from a carpenter and don't deal with doors unless I have to, I got some questions. The existing man door is a pre-hung insulated steel home entry door the swings out w/ an alum threshold. I don't want to use a threshold for the larger doors as the floor is concrete and I plan on using a vinyl seal strip on the bottom leaving 1/4" or so of clearance to the floor. This leaves a problem with the threshold on the steel door. I am thinking of using 2x4 framing for the larger doors and figured I could just use the bottom frame as the threshold for the steel door (iff need be, add a piece of weather strip to the bottom of the steel door to get a seal against the 2x4).

Next question is hinges. The wall is 8" concrete block with 2x8 wood framing in the opening. This gives me enough room to recess the larger doors into the opening at least 1.5" to maintain the flush look of the outside of the shop. Since the larger doors themselves will be rather heavy, I need hinges capable of handling the weight. I can either anchor them into the 2x8 framing of the opening or wrap them over this and attach them to the concrete wall sections on either side of the opening. Whats your thoughts on strap hinges with one side bent to allow the recess of the door into the opening?

Any thoughts or suggestions are very much welcome.

Those strap hinges aren't a good idea unless they have ballbearings. Shouldn't be any problem hanging your doors from the 2x8, as long as they're attached securely. Check the weight rating of your hardware.

Looking into the idea of small and larger door as opposed to three doors. Will think this one over.

Header is plenty strong, 8" steel beam, but having the overhead swing on either inside or out will cause logistical problems loading and unloading items from trucks. I ran all the options and the swing doors are what will work best for the least cost and time investment. I don't plan on being here much longer so I don't want to get into serious changes and costs.

Thought about installing the threshold over the 2x4 but didn't think about the osha factor, should be easy enough to do this way.

For anchoring the hinges to the 2x8's, should I just use stainless steel wood screws or put a steel plate on the back side of the wood then use self tapping 1/4"-20 screws to attach the hinges? Don't want to have trouble with loose hinges/screws.

How about weather strip/stops? Saw numerous types of these, extruded AL with U shape vinyl and also foam rubber for the seal. Price is reasonable either way, more concerned with what will work better. Going to loose some heat no matter what I do but I'd like to keep the losses as low as possible.

--->Paul

This is why I value input from numerous people so much.

--->Paul