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Need Help Reinforcing Door Jamb

Having read the FAQ's you are still unfulfilled and seek more enlightenment, so post your general lock picking questions here.
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Need Help Reinforcing Door Jamb

Postby Klaiviel » 15 Oct 2010 12:41

Hey so I have a question regarding how I should go about reinforcing this door jamb, it is an apartment doorway and I do have permission to do so. The problem is while normally I would use DJ Armor or the Strikemaster II in this situation the door jamb is a hollow steel tube (which I guess if fairly common in commercial buildings) and it takes like an inch and half before you get to any real wood. I have toyed with ideas in the past of filling the cavity with bondo and securing something like the Strikemaster II with really long screws but I am not sure how well that would work. What would you recommend as a method of reinforcing the door jamb? I have included pictures so you can see what I am talking about.
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Re: Need Help Reinforcing Door Jamb

Postby Evan » 15 Oct 2010 13:20

Klaiviel wrote:Hey so I have a question regarding how I should go about reinforcing this door jamb, it is an apartment doorway and I do have permission to do so. The problem is while normally I would use DJ Armor or the Strikemaster II in this situation the door jamb is a hollow steel tube (which I guess if fairly common in commercial buildings) and it takes like an inch and half before you get to any real wood. I have toyed with ideas in the past of filling the cavity with bondo and securing something like the Strikemaster II with really long screws but I am not sure how well that would work. What would you recommend as a method of reinforcing the door jamb? I have included pictures so you can see what I am talking about.



The hollow steel door jamb preps are common in commercial buildings and dense multi-unit residential buildings because they carry a higher fire rating than the kind of wooden door frame you would see used in single family homes... In commercial office buildings you will see hollow metal frames used even when solid wood fire rated doors are installed...

Why do you need to reinforce this door opening ?

I see NO evidence of any attempts to mess with the door in any of the pictures you took...

What are you trying to protect against or keep out of your apartment ?

Permission or not, the only thing I would add to that door is a sensor for a wireless ADT alarm system...

Unless you are in a building with an abnormally high burglary rate I wouldn't worry about upgrading the door frame... Do you have more information regarding incidents taking place in the rest of the building for advice givers to consider here or are you just being hyper-vigilant and/or paranoid about personal security here ?

~~ Evan
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Re: Need Help Reinforcing Door Jamb

Postby Klaiviel » 15 Oct 2010 13:35

I'm just doing higher than necessarily security because I want to. It doesn't make much sense to put an Abloy Protec on my front door if the door can just be kicked in... you know?

Why do you need to reinforce this door opening?:
So that the door can not be kicked in.

I see NO evidence of any attempts to mess with the door in any of the pictures you took...:
Nobody has messed with the door, I didn't mean to imply that anyone had.

What are you trying to protect against or keep out of your apartment?:
Everyone that is not me or my fiancee.

Permission or not, the only thing I would add to that door is a sensor for a wireless ADT alarm system...:
Appreciate the advice but I am not big on security systems I prefer mechanical security.

There is not a high crime rate here and I am not all that paranoid; again this is mostly just because I really like overkill. =)

Thanks for the response.
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Re: Need Help Reinforcing Door Jamb

Postby Evan » 15 Oct 2010 14:15

Klaiviel wrote:I'm just doing higher than necessarily security because I want to. It doesn't make much sense to put an Abloy Protec on my front door if the door can just be kicked in... you know?

The permission you were granted to alter the door included consent to install any kind of lock you wanted to? Did they ask you for a copy of the new keys so that the landlord could maintain access to the unit?

Klaiviel wrote:So that the door can not be kicked in.

LOL... Given your response that no one has messed with your door and that there is not a high crime rate there, adding more to your door opening could attract the wrong kind of attention... If your door is the only Fort Knox in the building that is usually a very good indicator to people who are in the burglary profession and constantly window shopping for the next score that treasures and prizes are contained within... You will never know who these people are, they could be a neighbor in your building or some outside contractor/vendor who comes to your unit with the landlord's staff present and sees your "overkill" mechanical security upgrade and starts dreaming of gold bars or stacks of cash hidden in secret compartments inside your furniture...

Klaiviel wrote:Nobody has messed with the door, I didn't mean to imply that anyone had.

In an apartment setting people are only usually interested in upgrading door security when there have been numerous burglaries either in their building or in another at their complex... Case else is paranoia/overkill and you should build your own house to prevent kick-ins as adding a plate on the top of the door frame only make kicking in the door slightly more difficult, not impossible...

Klaiviel wrote:Everyone that is not me or my fiancee.

Seems to contradict the right of access/inspection duty that your landlord has over their rental property... A lot of maintenance issues and emergencies happen on the fly like water leaks where management personnel will enter your unit without contacting you first for permission... Especially in a building protected with a central fire alarm system like the one indicated by the smoke detector on the hallway ceiling in your first picture... How many people work for your landlord? Odds are 75% of them have master keys to access your unit...

Klaiviel wrote:Appreciate the advice but I am not big on security systems I prefer mechanical security.

Just keep in mind that whatever additional "mechanical security" you add to the door, even with permission, you could be asked to remove at your expense and restore the door frame to its original condition that it was in when you moved into the unit when your tenancy ends in the future... The person granting you permission to modify the door today might not be in charge of the property when you move out... This is why most people don't bother adding fixtures/things to their apartments beyond what the landlord provides...

In your situation adding any additional "mechanical security" doesn't actually secure your rented premises against the major threat of internal theft by someone employed by the landlord, as such people would still have a key to your unit and are able to effectively bypass any such upgrades you make of that type... Even with employees who have gone through background checks and screenings this type of thing does happen as temptation gets the better of some people and not all maintenance/management employees are paid well... The only way to ensure true protection of your unit is to install a monitored alarm system so your central monitoring service can inform you when your unit is entered by someone who doesn't have the alarm code...

Klaiviel wrote:There is not a high crime rate here and I am not all that paranoid; again this is mostly just because I really like overkill. =)

Sounds like you need to become a property owner, ASAP... Plus this statement tends to support the personal security paranoia explanation for wanting to upgrade an intact door in a building/complex with a very low crime rate...

~~ Evan
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Re: Need Help Reinforcing Door Jamb

Postby Fuqua » 15 Oct 2010 14:56

i dont believe that a steel door is going to be all that easy to kick in. even if you reinforce the doorjam that will then just remain intact as the wall gives way.

bottom line is....if someone wants in your apartment that bad they will still get in.
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Re: Need Help Reinforcing Door Jamb

Postby Klaiviel » 15 Oct 2010 15:15

Alright Evan I was hoping to get the answer without going into too much detail but since you seem interested I will divulge the grand master plan with you. =P First understand I agree with you on most points but I have already thought this through quite considerably. I will admit the personal security paranoia because there is no point in denying that though my motivation also stems from the love of locks I have developed after being here for a while. Anyways my responses:

Evan wrote:The permission you were granted to alter the door included consent to install any kind of lock you wanted to? Did they ask you for a copy of the new keys so that the landlord could maintain access to the unit?


Yes, let me explain. In addition to being a tenant here I am one of three maintenance staff that services the property, therefore my landlord is my boss and we have a written agreement that upon my leaving I will restore any changes I have made to my unit back to the default. You are 100% right that by the terms of the lease I am required to provide the landlord with a working key to my unit for maintenance purposes.

Evan wrote:LOL... Given your response that no one has messed with your door and that there is not a high crime rate there, adding more to your door opening could attract the wrong kind of attention... If your door is the only Fort Knox in the building that is usually a very good indicator to people who are in the burglary profession and constantly window shopping for the next score that treasures and prizes are contained within... You will never know who these people are, they could be a neighbor in your building or some outside contractor/vendor who comes to your unit with the landlord's staff present and sees your "overkill" mechanical security upgrade and starts dreaming of gold bars or stacks of cash hidden in secret compartments inside your furniture...


I agree adding more to my door could attract the wrong attention; however, if the Strikemaster II or similar product is installed correctly is should not be visible from the outside to the best of my knowledge, same applies to hinge upgrades. Now you could argue that they will of course see the Abloy Protec and see that as an upgrade but I will say that if someone around here actually recognizes the Protec for what it is, chances are I am inviting them in anyways. lol

Evan wrote:In an apartment setting people are only usually interested in upgrading door security when there have been numerous burglaries either in their building or in another at their complex... Case else is paranoia/overkill and you should build your own house to prevent kick-ins as adding a plate on the top of the door frame only make kicking in the door slightly more difficult, not impossible...


I would love to build my own house, would you like to lend me the money? lol I agree its not a perfect solution it still probably could be kicked in with enough determination, but I would like to make them work for it. =)

Evan wrote:Seems to contradict the right of access/inspection duty that your landlord has over their rental property... A lot of maintenance issues and emergencies happen on the fly like water leaks where management personnel will enter your unit without contacting you first for permission... Especially in a building protected with a central fire alarm system like the one indicated by the smoke detector on the hallway ceiling in your first picture... How many people work for your landlord? Odds are 75% of them have master keys to access your unit...


I have agreed to provide the landlord (my boss) with a working key as stated before. You are right about the maintenance emergencies I deal with them all the time. 4 people work for my landlord 3 are maintenance staff (including me) 1 is office staff. Nobody has master keys we do not use a master system all individual key sets are kept in a locked key box in the office.

Evan wrote:Just keep in mind that whatever additional "mechanical security" you add to the door, even with permission, you could be asked to remove at your expense and restore the door frame to its original condition that it was in when you moved into the unit when your tenancy ends in the future... The person granting you permission to modify the door today might not be in charge of the property when you move out... This is why most people don't bother adding fixtures/things to their apartments beyond what the landlord provides...

In your situation adding any additional "mechanical security" doesn't actually secure your rented premises against the major threat of internal theft by someone employed by the landlord, as such people would still have a key to your unit and are able to effectively bypass any such upgrades you make of that type... Even with employees who have gone through background checks and screenings this type of thing does happen as temptation gets the better of some people and not all maintenance/management employees are paid well... The only way to ensure true protection of your unit is to install a monitored alarm system so your central monitoring service can inform you when your unit is entered by someone who doesn't have the alarm code...


I am totally cool with removing at my own expense at the end of my tenancy so that is not a problem. To protect myself in case of a landlord change this has all been recorded in a written agreement with my current landlord.

Aha! You bring up a very good point at the end of the day my keys still reside in the poorly secured key box. (Btw I am one of those poorly paid employees -_-) Anyways to deal with eternal threats as best I can to the key box I talked my boss into letting me install an Abloy Protec cam lock to replace the original 4 wafer cam lock that was on there. (I do all lock maintenance on the property.) Now they still don't have a security system in the office and they still are only using Kwikset locks but at least the key box itself is slightly more secure.

Now to deal with internal threats I will call your electronic monitored alarm system and raise you a mechanical one as originally promised. The idea is this, I use the Protec for my deadbolt and provide the office with one of the three Protec keys. K done that protects me from most everything except the actual office staff. Now to deal with the office staff I am going to put a special Schlage KIK cylinder I have prepared (by removing the top cover off the bible and instead tapping and capping with socket head set screws) into the lever handle you see in the picture. And I will provide the office with a key to that lock as well. So to recap you will need 1 Schlage key and 1 Protec key to open my door. Now on the copy of the Schlage key that I provide the office I am going to file down the ramp on the 5th pin in such a way so that the key can be inserted but not removed and it will still operate the lock fulfilling my lease agreement to provide a working key. This will let me know someone has been there as the key will be sticking out of my door and at the same time if they had legitimate reason to be there they can still lockup with the Protec key. If I anticipate them coming which in most cases I will be able to because I work there, I simply remove the pin that would otherwise cause the key to trap. Now lets say the key does trap, the first person they are going to call to fix it will be me, because I do all their lock work. Because its a lever KIK and because I put in the socket head set screws freeing the key will be super easy. Additionally I can explain the key being trapped as it being a bad key (very believable because our key duplicator is on its last leg). So there you have it my mechanical system to determine if an employee has gained entry without my knowledge.

Evan wrote:Sounds like you need to become a property owner, ASAP... Plus this statement tends to support the personal security paranoia explanation for wanting to upgrade an intact door in a building/complex with a very low crime rate...


As I said before I concede I will accept the paranoia explanation; however, I would like to add that this system I want to do, makes for a hell of a conversation starter. =) And again I would love to become a property owner if you would like to lend me the money. =P

Seriously though, back on topic do you have any suggestions for upgrades?
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Re: Need Help Reinforcing Door Jamb

Postby Evan » 15 Oct 2010 21:52

Klaiviel wrote:Seriously though, back on topic do you have any suggestions for upgrades?



Yes... Install the super secure lock on the office door where the key cabinet is kept... Perhaps the alarm system would be good there as well...

Upgrading your unit's door locks is ridiculous if your keys are going to be kept in the office even with an Abloy cam lock on a lock box... The entire lock box could just disappear and that would be a major expense to re-key everyone's locks...

I know that things work differently in different places but apartment complexes that are off master key systems with central fire alarm systems are very rare... Every apartment complex I have ever lived in that kept key sets in the office had them locked in a safe bolted to the floor of a closet... The copies of everyone's individual apartment keys were kept in a less obvious place inside the maintenance office...

Securing things inside a standard key box or piece of metal office furniture is just craziness... Such containers are not meant to be burglary resistant... Keeping keys to an entire building inside of such without taking more steps to secure them is a nightmare waiting to happen...

~~ Evan
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Re: Need Help Reinforcing Door Jamb

Postby Klaiviel » 15 Oct 2010 22:27

Evan wrote:Securing things inside a standard key box or piece of metal office furniture is just craziness... Such containers are not meant to be burglary resistant... Keeping keys to an entire building inside of such without taking more steps to secure them is a nightmare waiting to happen...


I completely agree its insane; but that's the way they do things here unfortunately. I have brought this up with my boss before; she barely let me put the Protec cam lock in, she doesn't care enough to do something sensible like a safe. Perhaps me being paranoid is slightly justified. It gets worse, said key box doesn't just contain master and copy key sets for all 120 units at this property it also has all key sets for an additional property that the company I work for manages as well as all the garage and mailbox keys.
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Re: Need Help Reinforcing Door Jamb

Postby Tyler J. Thomas » 17 Oct 2010 23:31

The StrikeMaster wouldn't work out of the box because the center of your deadbolt and knobset strike is far too close for the StrikeMaster's 5 1/2" - 6" intended range, or maybe my perception is just off.

Your best bet would be to take out the current deadbolt strikeplate screws and replace them with 3" wood screws, if they aren't already that length, to hit the jack stud. That doesn't alter anything noticeable and no one, especially your landlord, is going to care. If you're really worried, try to locate a steel strike plate from a local locksmith shop or fabricate one of your own that will retrofit in place. That's better than the soft brass strike plate you have now. That in conjunction with a metal jamb is going to provide plenty of protection.

If any of that has been suggested thus far, I apologize. Wasn't about to read through the entire thread, however.
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Re: Need Help Reinforcing Door Jamb

Postby Klaiviel » 18 Oct 2010 14:53

I like the idea of fabricating my own steel strike plate, I may try that thanks for the idea.
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Re: Need Help Reinforcing Door Jamb

Postby Ortin468 » 18 Oct 2010 19:18

Klaiviel wrote: I have toyed with ideas in the past of filling the cavity with bondo and securing something like the Strikemaster II with really long screws but I am not sure how well that would work. What would you recommend as a method of reinforcing the door jamb?



Bondo LOL... polyester has almost no structural strength. If anything I would fill the cavity with cement or concrete. Nothing to see and it will add to the overall security of the door.
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Re: Need Help Reinforcing Door Jamb

Postby Tyler J. Thomas » 19 Oct 2010 16:37

Ortin468 wrote:
Klaiviel wrote: I have toyed with ideas in the past of filling the cavity with bondo and securing something like the Strikemaster II with really long screws but I am not sure how well that would work. What would you recommend as a method of reinforcing the door jamb?



Bondo LOL... polyester has almost no structural strength. If anything I would fill the cavity with cement or concrete. Nothing to see and it will add to the overall security of the door.


I wouldn't attempt that. You're adding weight to a frame that might not have been designed for such a load. A landlord might appreciate the thought but he won't be too happy when he receives a bill because the frame/jamb has shifted because of the added weight and has to be replaced to sit plumb. Not to mention, the concrete is as only as strong as what's holding the jamb. Commercial jambs with poured frames are heavy, heavy duty and designed to carry the load (heavy duty materials and welds).
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Re: Need Help Reinforcing Door Jamb

Postby globallockytoo » 19 Oct 2010 21:29

Confederate wrote:The StrikeMaster wouldn't work out of the box because the center of your deadbolt and knobset strike is far too close for the StrikeMaster's 5 1/2" - 6" intended range, or maybe my perception is just off.

Your best bet would be to take out the current deadbolt strikeplate screws and replace them with 3" wood screws, if they aren't already that length, to hit the jack stud. That doesn't alter anything noticeable and no one, especially your landlord, is going to care. If you're really worried, try to locate a steel strike plate from a local locksmith shop or fabricate one of your own that will retrofit in place. That's better than the soft brass strike plate you have now. That in conjunction with a metal jamb is going to provide plenty of protection.

If any of that has been suggested thus far, I apologize. Wasn't about to read through the entire thread, however.


the Strikemaster II is designed to work with the standard pre-fab door prep in use in North America. The distance between the latch/backset and the deadbolt mechanism is about 5".

The important thing in this case is that it is already a metal jamb, so a SMII is unnecessary, in my opinion. Most strikes installed in the existing prefabbed metal jamb will be held on with machine screws.

For extra security you could install hinge bolts (or just install long screws that slot into the hinge side of the jamb)
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Re: Need Help Reinforcing Door Jamb

Postby Tyler J. Thomas » 19 Oct 2010 21:43

globallockytoo wrote:
Confederate wrote:The StrikeMaster wouldn't work out of the box because the center of your deadbolt and knobset strike is far too close for the StrikeMaster's 5 1/2" - 6" intended range, or maybe my perception is just off.

Your best bet would be to take out the current deadbolt strikeplate screws and replace them with 3" wood screws, if they aren't already that length, to hit the jack stud. That doesn't alter anything noticeable and no one, especially your landlord, is going to care. If you're really worried, try to locate a steel strike plate from a local locksmith shop or fabricate one of your own that will retrofit in place. That's better than the soft brass strike plate you have now. That in conjunction with a metal jamb is going to provide plenty of protection.

If any of that has been suggested thus far, I apologize. Wasn't about to read through the entire thread, however.


the Strikemaster II is designed to work with the standard pre-fab door prep in use in North America. The distance between the latch/backset and the deadbolt mechanism is about 5".


The measurement is 5 1/2" to 6". It's own their website.
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Re: Need Help Reinforcing Door Jamb

Postby Ortin468 » 20 Oct 2010 18:36

Ortin468 wrote:I wouldn't attempt that. You're adding weight to a frame that might not have been designed for such a load. A landlord might appreciate the thought but he won't be too happy when he receives a bill because the frame/jamb has shifted because of the added weight and has to be replaced to sit plumb. Not to mention, the concrete is as only as strong as what's holding the jamb. Commercial jambs with poured frames are heavy, heavy duty and designed to carry the load (heavy duty materials and welds).


Ok I can agree with that, one should always consider the load and the original structure. Maybe lightweight concrete, or limiting the fill area. Something that would stop that area of the jam being forced away from the door. Everything does depend on whats behind the jam. If it is sheet metal studs, almost anything would be useless. Wood, it would depend of the heft behind there. Concrete, now we are talking.:)

From the pictures it is tough to tell. The frame itself looks solid, but a tweak or 2 wouldn't hurt.
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