How to Install a Personnel Walk-Door Into a Steel Building

Installing a personnel door may seem daunting at first, but it's a straightforward and simple process than any DIY-er can handle!

Table of Contents

Personnel doors, also known as man doors or walk doors, are field-located doors. This means that they’re not designed into the structural elements of the building, and you’ll get to choose where the doors go once the primary and secondary framing of your building are installed. 

Most personnel doors are similar. They’re knock-down kits that take a few minutes to assemble and require nothing more than the tools and know-how you’ve already used to get your building standing. So, let’s take a quick look at how to install a personnel door. If you’d prefer video instructions, check out the YouTube video at the top of the page where we covered the same information.

Great Western Buildings founder Eric Beavers checking a building frame for straight and plumb readings before installing personnel door

Step 1: Ensure Building Frame is Straight, Plumb, and Secure

Installing personnel doors is one of the final steps before sheeting your building with its wall and roof system. So, it’s important to ensure that your building’s frame is completely done before installing man door kits. Any adjustments made to your building’s frame after installing the door could negatively affect the operation of the door. Worse yet, if your building needs major adjustments to get it straight and plumb, you could wind up with a door that won’t open or close at all. 

Measuring Anchor Points for a personnel door to install in metal building

Step 2: Remove Low Girt (If Applicable) and Decide Door Placement

If your building has a low girt that is in the way of your door, you’ll first need to remove it. This girt will be cut and reinstalled later. If your building does not have a low girt, you can proceed to deciding your door’s placement to begin the installation. 

When deciding on where your door should go, it’s important to keep a few things in mind. Measuring from the corner of the building, it’s best to keep your door spaced on whole feet where possible. This is because the high ribs on your wall panels are on one-foot centers, and it’ll make trimming and fitting the panels cleaner and neater around the door system. 

It’s also important to plan ahead for what is going inside the building and where your door or doors won’t be in the way. Keeping them close to corners typically ensures the most usable interior space, but we typically do not recommend putting them any closer than three feet from the corner to allow adequate room for installing all of the door components. 

Installing door kit in steel building

Step 3: Assemble the Door Frame and Drill Holes for Install

Now that you’ve decided where your door is going and measured it out, it’s time to assemble the door frame. Be mindful of the placement of the weather stripping and latch hole to ensure they’re on your preferred side of the building. The latch hole and hinges in most door kits are evenly spaced, allowing you to choose which side the door swings and whether it opens in or out. 

Once the frame is assembled, stand the frame up on your foundation at the edge of the building. You can use the kit’s supplied threshold to keep it in place or have a helper hold it steady while you mark the centers of each baseplate hole. These are the points where your fasteners will hold your door in place, so pay special attention to ensure your door frame stays flush with the edge of the building. 

Once your marks are in place, remove the door frame and drill the holes for your anchors. We recommend drilling down 7-8 inches. Remember to keep your bit as straight as you possibly can to ensure your anchors are properly vertical when installed. 

Step 4: Install Anchors and Check Door Plumbness

Anchors you use will depend on your building setup, but in many cases, standard wedge anchors are perfectly fine for a personnel door, as it’s not a structural element of the building. Simply stand the door frame back up and install your anchors. Then, using magnetic levels or whatever tool you prfer, check your door frame from plumbness and alignment. 

Clamping personnel door kit header to girt to fasten

Step 5: Secure Door Header to Upper Girt

In the case of Great Western Buildings metal building kits, there will almost always be a Girt at 7′ 4″. This allows man doors to easily be fastened at the top to this girt. Simply clamp the door frame in place once it’s plumb and aligned, then fasten the header with pop rivets or trim screws.

We don’t recommend using hex head screws for this portion of the install, as they can get in the way of panel and trim installs later. 

Installing hinges on a steel building door kit

Step 6: Install Hinges and Hang Door

It’s finally time to make this door kit an actual door! Install the hinges on the door itself, then, with a helper, install the hinges into the door frame.

When installing hinges, it’s extremely easy to install them backwards. So, take your time when planning it out and slow down a bit so you don’t wind up having to do this step twice. Trust us, we’ve been there plenty of times. 

Installing Lock Set on a personnel man door kit for a pre engineered metal building

Step 7: Install Lock Set, Weather Stripping, and Set Threshold

This step varies greatly based on what your preferred lockset and handle assembly is. Some locksets have dead bolts, standard door handles, and a virtually limitless number of other options. So, it’s important to understand what exactly your lock set will require you to do to install. 

Once you’ve got that figured out, it’s a somewhat simple process of drilling holes for your lock set and installing it. This is a pretty fiddly task and can get quite aggravating the first few times you do it. So, take your time. 

Once your lockset is installed, simply cut to length and install your weather stripping and set your threshold. If you don’t have a low girt, congrats! You’ve just installed your personnel door. 

Step 8: Cut and Reinstall Low Girt If Applicable

Measure from the holes of the girt’s mounting clips on the building’s columns to the door jamb. We recommend taking this measurement and cutting the girt about 1/4″ short of the measurement to ensure you won’t run into any binding issues with the door from added force or tweaking once the girt is reinstalled. 

After cutting and measuring, reinstall the girt on either side of the door. In this case, we used pop rivets to secure the girt to the door frame. 

That’s it! Congrats on your personnel door install and enjoy your building! 

Great Western Buildings Steel Barndominium in Colorado front 3/4 view

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