Bolt-on Post Support v Full Stirrup.

Hi guys,

What are the correct situations to use either methods. I'm talking in a strength and structure sense.

Attachment 67979 Attachment 67980

My questions are and have to do with the following thread - https://www.woodworkforums.com/showthread.php?t=66693

Attachment 67978

1. If I'm attaching a verandah to a house fascia and that house's fascia has been reinforced to the house's roof rafters can I support the opposite side's posts on bolt-on supports or should I do the old dig / stirrup / fill in method?
I'm figuring you'll say the dig / stirrup / fill in method but wanted clarification. Who wants to dig if they don't have to especially when cutting concrete is involved.

2. What is the real intended use of the bolt-on post support?
Can it support verandah posts. I ask because I've been told they can flex at the base. Of course it's handier to bolt-on rather than cut concrete and dig.

Cheers guys,
Dr - 307.:)

Are you a Builder/Home Renovator

I would direct this enquiry to the engineers at Pryda as to the suitable use of their stirrups. One would think that the raised stirrup is for ease of installation and possible termite protection but would not be as strong as the other type.

I've never used bolt on post supports and would be very wary of using them in a structural situation unless they'd been specified. If you don't know the thickness/Mpa/amount & type of reinforcing of the slab then you might just as well be gluing them down with liquid nails. I don't even like the stirrups (which are meant to be cast in BTW) as they flex a bit and need a fair bit of bracing during constructon. I prefer a fish plate bolted on either side of the post or a large cast in bracket.

Mick

Quote:

---

Originally Posted by rod1949

Are you a Builder/Home Renovator

---

Why do you ask?

DvdHntr,
I'll contact Pryda or McIntyre and report back what they said.

Mick,
Please explain - "prefer a fish plate bolted on either side of the post or a large cast in bracket".

Doc.

I've never been a fan of stirrups, I'd rather dig a 600mm hole and concrete the posts in, but that's me.

Waldo,
Why have you - never been a fan of stirrups, I'd rather dig a 600mm hole and concrete the posts in,

OK, I asked the experts :doh: and they said -

Mcintyre - Da uhh, I'll get some info and uhh I'll fax it to you.
I'll read it and let you know.
Pryda - they were more helpful and he basically said after I summarised it for him that -

Stirrups - are for lined / cladded roof structures where wind lift is an issue.
Bolt-on supports - decks, non cladded / non lined roof structures ie no wind lift.

Doc.

Quote:

---

Originally Posted by Dr - 307

Why do you ask?

Doc.

---

I've noticed and looking back on your post history you're on this site asking how to do things, you're doing work for "Clients" thus this indicates to me that you are recieving some sort of gratitude for the work you do for the client. Thus the line of work you are doing and the how to's you are asking on this site indicate to me that you may not be qualified and thus taking advantage of the good natured and qualified people on this site.

If I have formed the wrong impression then I sincerely appoligise.

Dude,

I got involved in this caper by being cluey and working things out. I started doing work on my own place, then my father in laws, my dads, my brothers, and so on and so on.
I ask questions that I believe are valid and of some value to other forumites. If I am deadset certain of my own knowledge then I offer my own advice to others like I have done on many occasions.
Where is the issue in me moonlighting building decks or verandahs. I have seeked and gotten council approval (when required or asked for) and have never been rejected. I draw my own plans (thanks to three years doing Industrial Design at RMIT) and seek to do things right that's why I ask alot of questions.
The deck that I just finished was my first paid job and in all honestly I hope I get a heap more. I feel and have been told numerous times that my work is bloody good and clean unlike my BIL's mates verandah which leaks at every polycarb overlap that was built by his 'chippy' mate. If I can slowly break into it on a full time basis I will, if not, I'm happy to moonlight. Who couldn't use the extra money.

I don't need to declare any of this but just like all my posts (where I thanked everyone for their help) I'm open and friendly and glad to help anyone I can that's why I'm on the forum all the time.

Now Rod, I've told you before, don't be sore that you lost your captain to the home of football because - "Such is life!!!" :U:U:U

No offence taken on my behalf. The problem with a forum is that for one, a forumite's personality is not felt and two, reading is a lot different to hearing so sometimes the message is conveyed in a stronger manner.

Cheers,
Dr - 307.

Quote:

---

Originally Posted by Dr - 307

Dude,

I got involved in this caper by being cluey and working things out. I started doing work on my own place, then my father in laws, my dads, my brothers, and so on and so on.
I ask questions that I believe are valid and of some value to other forumites. If I am deadset certain of my own knowledge then I offer my own advice to others like I have done on many occasions.
Where is the issue in me moonlighting building decks or verandahs. I have seeked and gotten council approval (when required or asked for) and have never been rejected. I draw my own plans (thanks to three years doing Industrial Design at RMIT) and seek to do things right that's why I ask alot of questions.
The deck that I just finished was my first paid job and in all honestly I hope I get a heap more. I feel and have been told numerous times that my work is bloody good and clean unlike my BIL's mates verandah which leaks at every polycarb overlap that was built by his 'chippy' mate. If I can slowly break into it on a full time basis I will, if not, I'm happy to moonlight. Who couldn't use the extra money.

I don't need to declare any of this but just like all my posts (where I thanked everyone for their help) I'm open and friendly and glad to help anyone I can that's why I'm on the forum all the time.

Now Rod, I've told you before, don't be sore that you lost your captain to the home of football because - "Such is life!!!" :U:U:U

No offence taken on my behalf. The problem with a forum is that for one, a forumite's personality is not felt and two, reading is a lot different to hearing so sometimes the message is conveyed in a stronger manner.

Cheers,
Dr - 307.

---

Yep, fair enough:2tsup:

a job were doing at the moment is pretty much exactly the same, villaboard lined gable end pergola... engineer specified:

-heavy duty pryda psq600 high wind gal post anchor
-cast min 350mm into 25 mpa 300 dia. concrete pier
-115 x 115 f7 kd h3 post through bolted to post anchor with 2 x m10 gal bolts

in sydney we need to get an engineer to design this stuff and a certifier to check on completion, before we can claim final payment.. i would imagine same in melbourne?

Anyone else have a preference or theory on posts in ground v stirrups v bolt on supports?

Doc.

Quote:

---

Originally Posted by sports fan

a job were doing at the moment is pretty much exactly the same, villaboard lined gable end pergola... engineer specified:

-heavy duty pryda psq600 high wind gal post anchor
-cast min 350mm into 25 mpa 300 dia. concrete pier
-115 x 115 f7 kd h3 post through bolted to post anchor with 2 x m10 gal bolts

in sydney we need to get an engineer to design this stuff and a certifier to check on completion, before we can claim final payment.. i would imagine same in melbourne?

---

I've never used the high wind anchor but I've read on the forum that a lot of people prefer them to the single 'leg' type. I always dig 600 deep by about 400 wide. Council approved my rear verandah with 350 diam holes.
As far as the certifier goes I have a guy come in and check depth of holes and all that and then final inspection when the job is done.

Doc.

[QUOTE=Dr - 307;689302]Waldo,
Why have you - never been a fan of stirrups, I'd rather dig a 600mm hole and concrete the posts in,

For my 2¢, a 100x100 or 90x90 post has more of a substantial anchor in a 300x600mm hole than a 3/4" or so diameter that a stirrup gives. But horses for courses.

[quote=Waldo;689388]

Quote:

---

Originally Posted by Dr - 307

Waldo,
Why have you - never been a fan of stirrups, I'd rather dig a 600mm hole and concrete the posts in,

For my 2¢, a 100x100 or 90x90 post has more of a substantial anchor in a 300x600mm hole than a 3/4" or so diameter that a stirrup gives. But horses for courses.

---

What about wood rot? has that ever been an issue for you direct sinking posts in concrete?

Just a question?

thanks
brett