Hi, I was thinking about how I could build a couple of lamp posts that are tall enough, cheap, and can be folded down for maintenance. Kind of like a flagpole principle.
Imagine casting two substantial U-irons that are 2m long into a pit 1.1m deep. Let the irons stick up 1m.
Then take two pressure-treated 195x45 beams, each 5.6m long. Screw them together securely and then take a flat iron, say 5mm thick, and screw this onto the narrow side as the picture shows.
Wouldn't the post be stiff enough in all directions?
Then it's just a matter of inserting a bolt, lifting up the post, and securing it in place with a couple of bolts more.
Good or bad?
Imagine casting two substantial U-irons that are 2m long into a pit 1.1m deep. Let the irons stick up 1m.
Then take two pressure-treated 195x45 beams, each 5.6m long. Screw them together securely and then take a flat iron, say 5mm thick, and screw this onto the narrow side as the picture shows.
Wouldn't the post be stiff enough in all directions?
Then it's just a matter of inserting a bolt, lifting up the post, and securing it in place with a couple of bolts more.
Good or bad?
Know-It-All
· Västra götaland
· 10 925 posts
It's probably enough if you glue the reglar...
Edit: and maybe a bit excessive with 195 wide...
Edit: and maybe a bit excessive with 195 wide...
No chance of it becoming wobbly without the järn? It's really windy here in Skåne.
Member
· Västerbottens län
· 18 047 posts
Keep in mind that it should be possible to travel with moderate force, skip the iron on the pole. Check with the nearest scrapyard if they have hit street lights that can be salvaged. Then I think 5.6 meters is on the short side, risking bright spots on the ground and darkness around. What kind of light source is intended, check the spread angle.
Protte
Protte
I use mast pipes https://www.proffsmagasinet.se/el-b...l/televes-mrk-2050-mastror-o50mm-2-m-28111596
attached with two through carriage bolts on a pole. To lower the pole, the bottom one is unscrewed and the pole can be lowered before windy days. You can choose how tall the pole becomes by adding more sections. I use 2 at six meters, which is enough to light up our (small) riding arena.
attached with two through carriage bolts on a pole. To lower the pole, the bottom one is unscrewed and the pole can be lowered before windy days. You can choose how tall the pole becomes by adding more sections. I use 2 at six meters, which is enough to light up our (small) riding arena.
https://www.jula.se/catalog/el-och-...g/stralkastare/gardsarmatur-led-002963/#tab02
Review:
"Nice distribution of the light source"
"...very good distribution of the light."
"bright, large distribution of the light"
"Illuminates an area with a diameter of about 20 m when mounted at a height of 5.5 meters"
"Mounted this at about 7 meters height, coverage front and back about 15-18 meters, side coverage about 40 meters"
Can we see a picture of the construction?M marka said:
How do you secure it in the ground?
Exactly how do you lower it?
Do you run the cable through the tube? How do you connect more lights without a junction box?
I already had fairly strong wooden posts in the corners and simply drilled holes in both the wooden posts and the mast pipe, one hole towards the end of the mast pipe and one near the top of the post, there is about 150 cm between the holes. Through the holes are carriage bolts with the head on the post side, the upper fastening is loosened a bit, and the lower one is completely removed when the post is to be lowered.
I have the simplest possible electrical connection, which in my case consists of https://www.clasohlson.com/se/Grenuttag-utomhus,-3-vägs-med-5-m-kabel/p/36-7802 but only because I happened to have it at home. I only have one spotlight in each mast with a plug, but if you want more, a power strip is suitable for that as well. I have the wiring outside the pipe secured with some cable ties; it's possible to have the cable inside the pipe, but then you must also have enough length so that it's still possible to lower the mast.
An alternative is to brace the masts with wire if you want to avoid lowering them in stronger winds.
I used exhaust pipe clamps from Biltema to attach the lights, had to drill a new hole in the lamp's mounting bracket.
If I hadn't already had posts in the corners, I would have cast some strong post/pipe/beam and used it; it doesn't matter much what it is as long as it's possible to get a mounting through it.
I have the simplest possible electrical connection, which in my case consists of https://www.clasohlson.com/se/Grenuttag-utomhus,-3-vägs-med-5-m-kabel/p/36-7802 but only because I happened to have it at home. I only have one spotlight in each mast with a plug, but if you want more, a power strip is suitable for that as well. I have the wiring outside the pipe secured with some cable ties; it's possible to have the cable inside the pipe, but then you must also have enough length so that it's still possible to lower the mast.
An alternative is to brace the masts with wire if you want to avoid lowering them in stronger winds.
I used exhaust pipe clamps from Biltema to attach the lights, had to drill a new hole in the lamp's mounting bracket.
If I hadn't already had posts in the corners, I would have cast some strong post/pipe/beam and used it; it doesn't matter much what it is as long as it's possible to get a mounting through it.