On 4/3/2021 9:47 PM, Clare Snyder wrote:
On Sat, 3 Apr 2021 19:38:26 -0700 (PDT), Linda Iverson
wrote:

On Friday, August 2, 2019 at 6:18:04 AM UTC-7, Goncalves wrote:
replying to mjacobsen925, Goncalves wrote:
Really mjacobsen925, a forum is where one asks questions not where one gets
censored.
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for full context, visit https://www.polytechforum.com/metalw...pe-639655-.htm

What if I just want to use black steel pipe as a curtain rod to hang heavy velvet drapes spanning a window greater than 12 feet long without the need for a center support? I’ll anchor ends using flanges (nipples and elbows) screwed into solid wooden header above window. Seems like it should be more than strong enough for such a girly thing.
2 or 3 inch might work but not 3/4 or 1 inch unless you want them to
sag


Maybe you could counter weight the ends, but your supports better be up
to the job then.

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On 4/5/2021 10:34 AM, Eli the Bearded wrote:
In rec.crafts.metalworking, Bob Engelhardt wrote:
On 4/3/2021 10:38 PM, Linda Iverson wrote:
What if I just want to use black steel pipe as a curtain rod to hang heavy
velvet drapes spanning a window greater than 12 feet long without the need
for a center support?
If you specify the weight & the maximum sag acceptable, someone here
can tell you the pipe size to use. However, heavy drapes and a 12'
span mean that the sag will probably be unacceptable for anything but
a really big pipe.

Or hide the sag with a valance box.

Elijah
------
as old fashioned as heavy velvet drapes


And trim the bottom so it looks level.

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Bob La Londe writes:

On 4/5/2021 10:34 AM, Eli the Bearded wrote:
In rec.crafts.metalworking, Bob Engelhardt wrote:
On 4/3/2021 10:38 PM, Linda Iverson wrote:
What if I just want to use black steel pipe as a curtain rod to hang heavy
velvet drapes spanning a window greater than 12 feet long without the need
for a center support?
If you specify the weight & the maximum sag acceptable, someone here
can tell you the pipe size to use. However, heavy drapes and a 12'
span mean that the sag will probably be unacceptable for anything but
a really big pipe.

Or hide the sag with a valance box.

Elijah
------
as old fashioned as heavy velvet drapes


And trim the bottom so it looks level.

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https://www.avg.com

With a 12ft length of "scaffold pole" (as I'd perceive it)
curtain-rail...

Maximum central load before permanent bend =
143.7kg-f
=
317lb-f

At that load, at centre
54 mm deflection
=
2~1/8th inch deflection

If two children were climbing the curtains at the middle, you'd have
higher concerns than whether the bottom of the curtains is still
exactly level with the floor for the duration of their adventure...

Rich Smith