I dont have a doorway with out molding, but I would say it needs atleast molding over the door. see pic:
it relies on the molding to stay up, but when your weight is on it it presses on the wide plastic piece and the pads on the other side of the doorway. i guess it could be done with out any molding but it would be a pita as it wouldnt hold itself up.
Thank you… I dont think itd hold at all w/o the molding.
Geoff, I’ll pm my new address/ or my paypal account :-p…
It will not.
Little force is put on the trim/molding of course…but it’s what keeps the bar stationary allowing your weight to be distributed to both the front and back of the door frame. I don’t know the engineering term for the forces at work but rest assured if you don’t have molding you’ll end up on your ass. LOL
Win the bet in fashion…tell the dude to try it on a door without molding and film it for youtube fun.
Trim holds it up, but with a 2x4 spiked into the other side of any doorway it becomes usable…just be careful with plaster I’d imagine with any sort of doorway. That stuff is brittle and sometimes doorways had interesting ways of being framed in the old days. You might start to push the door frame out and you really don’t know how sturdy it is until you try.
If lets say you had a small weight room at home, its not a bad idea if you don’t have a door to it, to lag it into the header as a permanent weight room fixture 
for those who are oblivious to what the inside of walls look like:
They may say it’s “required” but like I said last night, there is no way they would design this thing to rely on DOOR MOLDINGS that are fastened by FINISHING NAILS. That would be retarded.
Your weight isn’t transferred to the molding. Even a 100lb girl hanging on molding with finishing nails would rip the mofo off the wall. The molding merely acts as an anchor to keep the bar stationary. The bodyweight is transferred to the studs framing the doorway.
Carnut has one…that’s how I know. I did 1 massive pull-up and was huge for the next week. Right Don? LOL
BTW OT…how did the paint come out Don?
The question was do you need moldings/trim to use the pullup bar. The answer is no. You can weld it to a homemade frame screw it into a frame. strap it to a support beam or any other possible combination.
Of course, you can make a square peg fit in a round hole if you bash hard enough too. LOL
If you’re going to modify and rig things up why would you bother buying something meant for easy setup/removal? Just install a damn piece of molding rather than weld up a freekin frame. This thread is awesome…funny how a basic question can turn to a debate on here. 
You could probably weld this bar to a car and use it to tow as well…anybody want to try that out and get back to me? :banghead:
hahaahahaha nyspeed is so dumb 
IT WILL TAKE OFF
correct. You can use it on a doorway without moldings as long as you are hanging on it. The minute you take your weight off it will fall to the ground. (unless it is held up by a molding)
Technically a single drywall screw into the rectangular bad and door frame would be enough to hold that up.
Not gonna argue that…tis true. But I sure as shit wouldn’t shift my bodyweight around in space and expect it to hold me. I guess there should have been a preface about whether its a “good idea” or “safe” to forgo molding then.
a door frame IS NOT molding… :roflpicard:
this makes no sense
Lol. Trust me. Carnut gets a lot more then most of the people on this site. You need this above all :
Now most home doors are made this was but if the door is a slider or some other unusual setup this bar may not work since there is not enough strength to support it.
So yes it does make sense.
ur right will
If there is no molding, it depends where you are hanging, really… it looks like there are handles that protrude out past the cross bar, if that’s the case, the unit can generate a moment about the cross bar, which will generate a reaction force normal to the wall at the rear support which will impart a frictional force on the wall. So it MIGHT WORK with no moldings if you hang on the handles that stick out, but that’s dependent on the coefficient of friction of the wall, and apparatus.
However, if you are hanging ON the cross bar it WILL NOT WORK without the molding, the only moment created will be through your grip (if doing a chinup) and it’s unlikely that that will generate the required normal force at the wall sufficient to support the bar and a person. The free body diagram would show a vertical negative weight component, but there is no moment, which means no normal component, which means no friction, which means NO DICE.
Now, all you people saying that if you hang on molding with your fingers, it will rip off the molding so it cannot be possible for this device to rely on that… you’re wrong.
When you hang on the molding with your hands, you’re imparting a moment which loads the nail in TENSION and shear. As a result, the nail will pull out of the wall, however, the geometry of the chin up bar loads the nails in PURE SHEAR, even with a low yeild stress of mild steel 35ksi, a single 1/16 nail can support 107 pounds. And that’s EXCLUDING the friction at the wall. When you add the friction, it becomes a multi-variable statics problem, but totally solvable, and likely a SINGLE nail would be PLENTY of support.
Please don’t make me school you all by posting FBDs.
ive framed houses, i know how to construct a doorframe,but thanks for the diagram
i was refering to don saying “I HAVE A DOORFRAME” and then willybeen saying “Finally, someone who understands!” or whatever… willybeen wanted someone to say they need TRIM around the door, and carnut said doorframe
sliders door still may work, the stud is just 4" facing instead, would i trust it if i was 150lbs+, no
isn’t this thing bolted into the stud or header?
no
like newman said, if u are hanging on the 2 bars facing towards you, u do not need molding, if u are using the horzontal bar u will need it