looking for a specific fastener to mount a basketball hoop

Forums › Home Workshop DIY › looking for a specific fastener to mount a basketball hoop

greenbone

176 posts

Master Geek

#207244 15-Dec-2016 14:43

im wanting to mount a steel (heavy) basketball post to a concrete footing

the post mounts by way of a steel bottom plate with 4x m12 holes

it needs to be removable, so anything like a dynabolt / stud anchor wont work

it needs to be flush at ground level when the post is removed (nothing for kids to run into) so embedding the threaded end in the concrete wont work

ive looked at ramset drop anchors, only size that is close is m10 and it embed about 50mm into the footing, not big or deep enough to hold

any ideas? something like a m12 female threaded socket, 200mm or longer. ive googled hard and come up empty

hsvhel

1237 posts

Uber Geek

ID Verified

#1689479 15-Dec-2016 15:11

Get in touch with Anzor fastners (Spelling?!?)

They can source all sorts of weird and wonderfull

Referral Link Quic

Free Setup use R502152EQH6OK on check out

BlueOwl

85 posts

Master Geek

Lifetime subscriber

#1689490 15-Dec-2016 15:30

Try flush head dynabolts

https://www.bunnings.co.nz/ramset-dynabolt-hex-316-stainless-steel-m12-x-60mm_p00194323

these are more removable than the standard dynabolt, as long as the hole is a fair bit deeper than the bolt for the end cone to drop off when unscrewing.

Sidestep

1013 posts

Uber Geek

Lifetime subscriber

#1689494 15-Dec-2016 15:37

greenbone:
im wanting to mount a steel (heavy) basketball post to a concrete footing

the post mounts by way of a steel bottom plate with 4x m12 holes

it needs to be removable, so anything like a dynabolt / stud anchor wont work

it needs to be flush at ground level when the post is removed (nothing for kids to run into) so embedding the threaded end in the concrete wont work

ive looked at ramset drop anchors, only size that is close is m10 and it embed about 50mm into the footing, not big or deep enough to hold

any ideas? something like a m12 female threaded socket, 200mm or longer. ive googled hard and come up empty

What you want is a Ramset Dynabolt 12mm drop in anchor

nunz

1421 posts

Uber Geek
Inactive user

#1689537 15-Dec-2016 16:12

greenbone:

im wanting to mount a steel (heavy) basketball post to a concrete footing

the post mounts by way of a steel bottom plate with 4x m12 holes

it needs to be removable, so anything like a dynabolt / stud anchor wont work

it needs to be flush at ground level when the post is removed (nothing for kids to run into) so embedding the threaded end in the concrete wont work

ive looked at ramset drop anchors, only size that is close is m10 and it embed about 50mm into the footing, not big or deep enough to hold

any ideas? something like a m12 female threaded socket, 200mm or longer. ive googled hard and come up empty

did the ramset idea work? Was it big enough?

alternatively, take a solid steel tube, get it cored out with a thread and concrete it into the ground. if it is too hard to get those deep enough, weld them on a plate, bury the entire plate. Make sure no crud gets in the thread when the post is removed.

This guy has a similar idea - but using sticking up bolts. Same adea but either thread nuts into the back of the plate or make a long female nut welded to the plate

https://www.youtube.com/watch?v=mrck-thMm8A

Wade

2225 posts

Uber Geek

#1689571 15-Dec-2016 16:26

http://www.anzor.co.nz/masonry-anchors/internal-threaded-anchor

Disrespective

1926 posts

Uber Geek

#1689639 15-Dec-2016 16:54

I can't recommend Coastal Fasteners highly enough. The guys down there know their stuff and i'm sure if you called, you could talk them through the situation and they'll know what you need to do.

Brunzy

2016 posts

Uber Geek

Trusted

#1689679 15-Dec-2016 18:46

Loxins

Sharesies

Trade NZ and US shares and funds with Sharesies (affiliate link).

eracode

Smpl Mnmlst
8874 posts

Uber Geek

ID Verified

Trusted

Subscriber

#1690792 16-Dec-2016 02:19

Brunzy: Loxins

Not particularly helpful. Couldn't you have at least have added a few more words to present a meaningful post?

Sometimes I just sit and think. Other times I just sit.

Brunzy

2016 posts

Uber Geek

Trusted

#1690810 16-Dec-2016 07:40

https://www.blackwoods.com.au/part/03754609/anchor-masonry-loxin-rlm10-10mm

There you go, sits flush when removed.

Don't you have google ? ;-))

Sidestep

1013 posts

Uber Geek

Lifetime subscriber

#1690866 16-Dec-2016 09:02

eracode:

Brunzy: Loxins

Not particularly helpful. Couldn't you have at least have added a few more words to present a meaningful post?

Brunzy's one word post pretty much covers it!.. Loxin anchors are a - maybe better - option for OP.

Another flush, threaded anchor, but pressure from threading the bolt in does the seating.

For non structural (stock yard rails) we just use the cheap drop-in anchors:
- because they come in big boxes (really cheap)
- they're not super long (drilling holes in concrete is a slow job)
- can set them without stuffing around and threading each one in - theoretically requires a 'special tool' to set (we use a sledgie and a steel drive)
- they're strong (rated medium duty when correctly set)

If OP correctly uses ANY of the anchors pointed to in this thread the basketball hoop will NEVER come out.
I mounted a Netball hoop for my kids 5 years ago, with what I had at hand - some 5mm plate, M8 drop in anchors and threaded rod with nuts.
The pole's galv pipe & I welded in a threaded sleeve to allow different heights and netball/basketball hoops (turns out there's official kids & adult heights)

It's stood up to 3 boys climbing & swinging on the top, neighbour backing into it, endless kids swinging around it at high speed.

greenbone

176 posts

Master Geek

#1691063 16-Dec-2016 13:13

appreciate all the knowledgeable answers, thanks. ill post a few pics

chevrolux

4962 posts

Uber Geek
Inactive user

#1691207 16-Dec-2016 19:22

Weighing in late.... Ramset Tru-Bolts. Bloody awesome and hold the same as a dynabolt. But they are removable, unlike a dynabolt.

andrewNZ

2487 posts

Uber Geek
Inactive user

#1691258 16-Dec-2016 20:56

A drop in anchor might be the go, a Chemset one might be better than a standard one.
The major issue will be crap getting into it when there's nothing there.