Steel Stumps - Plate on side or bottom?

[DEVLPA]

Currently building a new deck with 75x75 SHS stumps and F17 hw bearers.

My questions is; is it better to have a flat plate on the stumps and connect to the bearer from under; or steel plate on side of stump, bearer sits on SHS and is bolted to the plate from the side?

Thanks,

Matt

[DJ’s Timber]

Hi Matt

Instead of using flat, use angle iron

Put this on top of the 75 shs

Then you can bolt thru the side of bearer which stops twisting and also giving the bearer something so sit on

Hope this helps you

Cheers DJ

[Shedhand]

G'day
I've just had the steel stumps done for my house extension and large deck. I used 100 x 100mm steel posts with a 8mm steel plate welded to the bottom with 10mm rebar welded to that and set 450mm into a concrete pad. I made a lot of 100 x100mm X 10mm angle steel cut to 110mm lengths and welded to the top of the stump. Sat the bearers on them and bolted through the side of the angle into the bracket. If this is confusing tell me and I'll post a picture.
Cheers

[Shedhand]

PS: Welcome to the madhouse.

[DEVLPA]

Thanks.

Picture would be great!

EDIT: I think ive got it now after reading again!

So approx 110mm should be long enough and then say 2 x M10/12 bolts per plate?

[DJ’s Timber]

Hi Matt

110mm will be long enough and m12 would be better as it won't twist as much also you should offset the holes on tne angle so that you have a hole toward the top and bottom of bearer

Cheers DJ

[DJ’s Timber]

Hi Matt

110mm will be long enough and I would use 2 M12 bolts that are offset
ie there should be one bolt near bottom and top of bearer
Using a M12 bolt will stop any twisting

Cheers DJ

[Shedhand]

Hi Matt

110mm will be long enough and I would use 2 M12 bolts that are offset
ie there should be one bolt near bottom and top of bearer
Using a M12 bolt will stop any twisting

Cheers DJ

G'day Matt
If you use F17 or F22 Hardwood you won't have a problem with twisting particularly if you do it during the cooler months and put the decking down pretty soon. If you use CCA Radiata - say 140 x 45 - you still shouldn't have a problem unless you leave it a couple of weeks until you lay the decking. I used M10 + 60mm galv coach bolts. Also, if you use CCA treated pine you must use galvanised nuts, bolts and washers NOT Zinc Plated. ZP will corrode on contract with CCA. In case you don't know, don't burn the CCA pine offcuts and wear a mask when using a power saw to cut it.
Cheers

[DEVLPA]

Thanks,

Bearers/Joists are all F17 HW, decking will be hw also yellow balau or kwila or similar.

[Shedhand]

Thanks,

Bearers/Joists are all F17 HW, decking will be hw also yellow balau or kwila or similar.

Good choice for the bearers and joists mate. Make sure all the exposed cut ends are painted with some kind of exterior sealer. I haven't heard of yellow Balau or Kwila but if they're the typical Asian rainforest hardwood they'll be dense and short grained which will require drilling before nailing or screwing otherwise you'll have a lot of splits happening. I'm using Massara (from Brazil) twice as heavy as Jarrah and short grained. I'm drilling first then fixing with stainless steel dome head nails. Got over three thousand 2.5mm holes to drill so I bought an el cheapo GMC bench drill press and will cobble together a jig of some kind to make sure I drill nice straight patterns.
Good luck with it.

[SIMONLEWIS]

Hi Shedhand, just wondering if you could send me that picture, as I dont really get it. I'm about to start something that sounds very similar.
Cheers
Simon
my email is [email protected]
Cheers

[Shedhand]

Hi Shedhand, just wondering if you could send me that picture, as I dont really get it. I'm about to start something that sounds very similar.
Cheers
Simon
my email is [email protected]
Cheers

look here simon.
cheers
mike

[sleeping-wood]

I am going with a galvanised stump (89x89x5 RHS) with vertical leg for bolting of bearers on a new house. I want to install Ant Caps on the top of the stump directly under the bearer. There are several sizes of caps available from about 120 - 200 square. Does it matter what size cap is used? I would prefer to use the smaller caps.

[Ivan in Oz]

G'Day Ppl,
Just found this.........I've been quite quiet for a while.
I made some Posts at Work, out of [from memory]
75 x 75 x 5 or 6mm Square.
The Bottom plate was 200 x 200 x 12 or 15mm with a 25.4mm [1 inch] gal Rod in the middle, or close to the middle.
The bottom of the STEEL POST had a 75mm Section of "Post" material welded at RightAngles to it.
This had a 25.4mm clearance hole drilled through the 2 Horizontal Faces.

What this did was to allow for adjustment with the 2 Hex nuts either side of the Bottom of the Horizontal Faces.

I wish I had a Digital Camera :mad:
Oh!! The plate on top of the post was 75 x Approx 150mm x 10 or 12mm, on the straight, and a Largish "L" for the Corners.

Used 12mm Coach Bolts and 10mm or 12mm Masonary Anchors and/or 10mm Chemsets

All this got the Thumbs up from the local Building Inspector;
I would ask him how he would it himself do;
or would like me to do the job(s)

Presently have a Fence and Extension [Bath, Laundry and Study/Hobbies Room] to complete, once Settlement is finalised......What? 2-3 years time :mad:

I'm not going to bust a Gut just to Loose it all:eek: :mad: