Who here is our resident structural engineer??
retroxler58 ????
0
-
Have you ever seen joist attached like this,without lapping??
Each joist is nailed into 2x10 sitting on edge on top the 2x4 header.
Only two rooms are divided like this. All other joist are lapped on the headers.
0 -
1" rest is not much. Why the 2x10? 0 -
It looks good to me, that is the method I used on a barn floor to gain resistance to twisting forces. 0 -
Seen often before the advent of joist hangers. 0 -
Hard to understand from the drawing.
Are you saying that the "header" is a 2x4 laid flat?
There is a 2x10 on edge, that the joists are nailed in to.
Is this a single 2x10?
Is there a stud wall beneath this "2x4 header?"
Does this span any door or window openings?0 -
joe Are you using Crayons again? 0 -
Looks structurally sound, though I would think a couple of toenails into each joist would be a good insurance policy.
Assuming the 2 x 4 is properly supported full width and length, you have a solid connection supporting the load vertically, similar to a joist hanger arrangement. If the joists are then supported laterally by the floor/roofing substrate, it should be as good a system as any.0 -
What Don said. 0 -
They must have hired one of them good working Messicans.
While it may hold, it is not the best way to do the job IMO.0 -
looks like it would be fine, my only concern would be weight load without using a beam for the 13 foot span but if load is not a factor it should be good. 0 -
quote:Originally posted by allen griggs
Hard to understand from the drawing.
Are you saying that the "header" is a 2x4 laid flat? yes
There is a 2x10 on edge, that the joists are nailed in to.
Is this a single 2x10?yes
Is there a stud wall beneath this "2x4 header?"yes
Does this span any door or window openings?no0 -
Thanks for the replies,all.
I've never seen it done like this before.0 -
OK in this case this is a strong design there is a stud wall entirely supporting this joist system, 2x10 joists spanning 13 feet 16 inches OC.
Today, I am the resident structural engineer of this forum, I attended Ga. Tech for 2 quarters. I never took any engineering courses, but I walked past the Mechanical Engineering building at least a dozen times.
One of my buddies on the Tech soccer team was majoring in Mechanical Engineering.
I can spell the word "engineer." I think that says it all.0 -
quote:Originally posted by allen griggs
OK in this case this is a strong design there is a stud wall entirely supporting this joist system, 2x10 joists spanning 13 feet 16 inches OC.
Today, I am the resident structural engineer of this forum, I attended Ga. Tech for 2 quarters. I never took any engineering courses, but I walked past the Mechanical Engineering building at least a dozen times.
One of my buddies on the Tech soccer team was majoring in Mechanical Engineering.
I can spell the word "engineer." I think that says it all.
Spent 20 years in the Marine as an Engineer. Just not the Nail bending kind.[:D]0 -
?? never seen floor joists that close together. either they have joist hangers and are 16" apart, or use those 1x4's in an X between joists to prevent twisting... and are 16" apart.
no reason to be 1-1/2" apart that I can think of.0 -
not the way they do it at the Holiday Inn Express........... 0 -
quote:Originally posted by buschmaster
?? never seen floor joists that close together. either they have joist hangers and are 16" apart, or use those 1x4's in an X between joists to prevent twisting... and are 16" apart.
no reason to be 1-1/2" apart that I can think of.
DO NOT SCALE THE PRINT0 -
oh I didn't see the part where he wrote 16" O.C. he drew them like they are next to each other.
carry on.0 -
maybe they did it like that because it was more convenient where they are attached at the other walls, and this happens to be where they landed on this wall. 0 -
It's actually a poor design.....just say you put a heavy piano on one side of the floor, the weight is held up by the two nails into the rafter edge on each 2 X 10. You also have an inch of 2 X 4 nailed under the 2 X 10 to hold up your 2 X 10's but the 2 X 4 is held on by nails, that's a very weak design. So with the heavy weight the nails slide out of the 2 X 10's and the 2 X 4 gets pressed down and the nails slide out of it and the whole thing collapse's. For strength you always put the 2 X 10 across a header or beam and that creates strength as it can't shear off like them nails.
just my .02 cents0 -
Again, why the 2x10? Lay them next to each other and nail them together. More resting on the header. Either way is a crap way. Sub floor aint gonna be right staggered like that. Be better to butt them together with a plate along the side. 0 -
quote:Originally posted by thorhammer
It's actually a poor design.....just say you put a heavy piano on one side of the floor, the weight is held up by the two nails into the rafter edge on each 2 X 10. You also have an inch of 2 X 4 nailed under the 2 X 10 to hold up your 2 X 10's but the 2 X 4 is held on by nails, that's a very weak design. So with the heavy weight the nails slide out of the 2 X 10's and the 2 X 4 gets pressed down and the nails slide out of it and the whole thing collapse's. For strength you always put the 2 X 10 across a header or beam and that creates strength as it can't shear off like them nails.
just my .02 cents
Use some high strength wood screws instead and pre-drill the holes so the edges of screws bite in without cracking the wood. Nails are the weak spot here.
serf0 -
quote:Originally posted by buschmaster
oh I didn't see the part where he wrote 16" O.C. he drew them like they are next to each other.
carry on.
They are 16"OC,and stagger each other on each side of the wall. Two separate rooms,left/right.0 -
The wall underneath is taking up the load. If properly designed no problem. I'd make sure some bridging is installed however to keep the "joist" from twisting. 0 -
quote:Originally posted by asop
The wall underneath is taking up the load. If properly designed no problem. I'd make sure some bridging is installed however to keep the "joist" from twisting.
That's a load bearing wall!0 -
It is a strong design. The joists are resting on 1 inch of the 2x4. I prefer to see the joist resting on 1 1/2 inches but one inch is pretty good. Do you think an inch of pine will tear away? I doubt it.
Secondly, the joists are nailed into the 2x10. They are 16 inch OC and spanning 13 feet. This is a strong design.
I wouldn't have done it this way, the 2x10 in the middle is some bizarro install, better to have the joists match up, and overlap, and not have a 2x10 in the middle. Or use a doubled 2x10 in the middle and install joists with joist hangers.
But this is a strong design.0 -
According to this, it is not up to code.
http://www.inspect2code.com/residential-code-requirment-for-floor-joists/0 -
^^^^ mine is not lapped tho,it's a continuous 2x10,not blocks as in your picture. 0
Please sign in to leave a comment.
Comments
28 comments