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PostPosted: Fri Feb 02, 2018 3:06 pm 
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Ok, so over the past few days I've been constructing the framework for the 6ft x 4ft by 8ft tall shed.

For construction, 3" x 2" c16 timber was employed. Four screws for each stud (two in the header plate, two in the sole plate) have been used, they are 4.5mm x 75mm decking screws. Once I finished the 8ft x 4ft and 7ft x 4ft wall (pitched flat roof) I noticed that there was some flex with these pieces but figured once all the walls were screwed together this would disappear.

With the other two walls (7ft x 4ft) I used used 5mm x 100mm screws as I'd run out of the decking screws, seemingly less movement with these structures.

Earlier today I began joining the walls together...

Image

...unfortunately the flex is still there. The structure can be rocked left to right, by pushing/pulling against the studs. This is my first lesson in carpentry, and I'm wondering if longer and or thicker screws should've been used? Or is something else causing this?

Thanks :)


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PostPosted: Fri Feb 02, 2018 3:18 pm 
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tempory brace diagonally on 2 walls at 90 degrees to each other
if you are cladding with sheet material it will stop any problems

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PostPosted: Fri Feb 02, 2018 3:25 pm 
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big-all wrote:
tempory brace diagonally on 2 walls at 90 degrees to each other
if you are cladding with sheet material it will stop any problems


Thanks :) However, upon reading through various plans I haven't noticed any methods of strengthening such as noggins etc. I'm not entirely sure if I'm gonna clad the interior with plywood,.

I thought that the structure would've been strong and solid with this method of construction, not flexible like this. Curious to know why it's turned out like this way, have I gone wrong somewhere?


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PostPosted: Fri Feb 02, 2018 3:48 pm 
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The Z'eer wrote:
I thought that the structure would've been strong and solid with this method of construction, not flexible like this. Curious to know why it's turned out like this way, have I gone wrong somewhere?


You've not gone wrong, you just haven't finished yet.
Once you get the cladding on the outside it will stop the frame racking and it will be a lot stiffer.


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PostPosted: Fri Feb 02, 2018 3:49 pm 
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your structure will be very strong but not rigid
wood and screws are immensely strong in compression
when you push it sideways you are levering the joints so putting many tens off times the force similar to standing on one leg

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PostPosted: Fri Feb 02, 2018 7:14 pm 
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big-all wrote:
tempory brace diagonally on 2 walls at 90 degrees to each other
if you are cladding with sheet material it will stop any problems


Personally I'd brace diagonally on all 4 walls if not putting ply on all the internal walls.

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PostPosted: Fri Feb 02, 2018 9:41 pm 
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wine~o wrote:
big-all wrote:
tempory brace diagonally on 2 walls at 90 degrees to each other
if you are cladding with sheet material it will stop any problems


Personally I'd brace diagonally on all 4 walls if not putting ply on all the internal walls.

its all a compromise really :lol:
if you have a diagonal on all walls they always get in the way :lol:
because its quite a small structure the flexing or movement on the unbraced walls should be quite small
if its a problem a roof brace from the "V" on both the braced walls to the diagonally opposite corner will reduce it quite a bit

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PostPosted: Fri Feb 02, 2018 10:05 pm 
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Once you clad the outside it’ll be fine. Put a temporary diagonal brace on each panel prior to cladding(make sure you square and plumb each panel)
3x2 cis will always have a bit flex over that height but it’s a shed at the end of the day.

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PostPosted: Mon Feb 19, 2018 2:34 pm 
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I placed 45 degree braces in all the squares but the door and header plate framework.

Here's the framework erected and joined together...

https://imgur.com/a/AJ3zR


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