How not to mount a bracket.

rolfw

Believe it when I see it Admin.
Staff member
Joined
May 1, 1999
Messages
38,126
Reaction score
1,489
Points
113
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
Had to make this mast safe this morning, not much fun, as it had broken and moved the brick which the top bracket was bolted into and was hanging over the edge of a three storey block. Trying to lever a 20' steel mast with an 8' Triax Unix 100 antenna on top, weighing in at nearly 3 kilos was a little hairy, let alone then trying to support it whilst undoing the U bolts on the bottom bracket. :)

But the problems of dismounting it are not the reason I posted this, it is to emphasise that when mounting brackets on a gable, do not mount the top bracket too close to the top courses of bricks, as there is no weight above the bricks and you run the risk of a brick being pulled out, the same applies to bolting into chimneys, as a general rule don't do it.

Also, when mounting a heavy mast, make sure that the brickwork is sound enough to support it, use heavy gauge brackets, enough of them to support the weight/movement of the mast and spaced far enough apart, with appropriate fixings.



A single set of 18" T&K brackets are not really sufficient to support a 20' x 2" steel mast with a 3 kilo antenna on top, even less so when they are not spaced far enough apart and only fixed using 2" coach bolts and plastic plugs. Similarly, if you are mounting a heavy dish, or a dish on a long mast, make sure you have the right brackets and fixings.
 

Attachments

  • bad_mount_1.jpg
    bad_mount_1.jpg
    198 KB · Views: 103
  • bad_mount.jpg
    bad_mount.jpg
    130.4 KB · Views: 96

Llew

cerca trova...
Staff member
Joined
Jan 1, 2000
Messages
15,650
Reaction score
3,828
Points
113
Age
79
My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
Heck, that looks horrible :eek:

Bill Wright would like those pics for his archive, I'm sure...

Llew
 

satelliteman

Administrator
Staff member
Joined
May 7, 2007
Messages
12,034
Reaction score
383
Points
83
My Satellite Setup
See signature
My Location
East Midlands, UK & Lanzarote, Canary Islands
Looks a bugger to hold and at the top of the ladder too.

As a standard rule now I only use anchor fixings with all T&K brackets, even if it's only a small mast. Coach bolts & Nylons are only good for zone 1 dishes.
 

Topper

Amo Amas Amant Admin
Staff member
Joined
Nov 18, 2004
Messages
23,692
Reaction score
3,858
Points
113
Age
67
My Satellite Setup
1.2Mtr Polar MTG yes it has been on the arc for 35 years and is now fixed on 13 East using two pairs of rusty molegrips. Unlike me they never groan but always perform.
My Location
Blackburn, Lancashire
I hope you charged danger money Rolf :cool:

Did you repair the brickwork or just leave it?
 

rolfw

Believe it when I see it Admin.
Staff member
Joined
May 1, 1999
Messages
38,126
Reaction score
1,489
Points
113
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
I was on a small flat roof, on the stairwell section which joins the two blocks, wouldn't have attempted it from a ladder, in fact my ladders wouldn't have reached that high anyway, they only just made it to the flat roof.

Taking down a mast of that length and weight which is listing at a 45 degree angle is pretty much impossible off a ladder for one person.

I managed to pull the brick back out and seal it in with silicone as a temporary measure.

I've replace the 18" T&Ks with a set and a half of 12" T&Ks, fixed with sleeve anchors and going back to fit an extra one at the bottom, as I didn't have another on the van.

Have also stood the mast on a bonded pad to alleviate the stress on the brackets.
 

Attachments

  • re-mount.jpg
    re-mount.jpg
    139.9 KB · Views: 82

aba

Regular Member
Joined
Apr 21, 2007
Messages
173
Reaction score
0
Points
0
Age
68
My Satellite Setup
chaparral montery 40 fully loaded
ehcostar ad3600ipvia
3 dishes zone 2 / 1 mt motorized / 2.3 m motorized
My Location
nottingham
jobe like that short a t & brackets as possible galvanized
as far apart as possible
mungo bolts i dont think so as they will split the bricks
14 mm rawl bolts every time
 

satelliteman

Administrator
Staff member
Joined
May 7, 2007
Messages
12,034
Reaction score
383
Points
83
My Satellite Setup
See signature
My Location
East Midlands, UK & Lanzarote, Canary Islands
What are they saving the old dishes on the roof for, lol
 

rolfw

Believe it when I see it Admin.
Staff member
Joined
May 1, 1999
Messages
38,126
Reaction score
1,489
Points
113
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
@ aba - I always use galvanised brackets, but most of my local competition seem to use painted.

@ satelliteman - Pure laziness, they've both been there for a few years by the look of it. :)

I have to go back and fit the fourth bracket, so will meet the management company owner and ask if he wants me to remove them. :)
 

wod

Specialist Contributor
Joined
Aug 7, 2005
Messages
4,213
Reaction score
235
Points
63
My Satellite Setup
1m channel master, jaeger smr1224, Inverto black ultra twin, technomate tm-1500ci, broken receiver vantage x221ci, New additions Skybox F5s and technomate tm-5402 HD arriving soon.
My Location
yorkshire
thats why i have 6 rows of bricks and the roof above my top bracket as i was worried about that happening.

rolfw, if your competition do installs like that then i don't think you have anything to worry about.
 

CROSSBONES

Specialist Contributor
Joined
Jul 23, 2005
Messages
2,003
Reaction score
187
Points
63
My Satellite Setup
1.2m channel master on a jeager 1224 motor. 55cm fibo Gregorian. VU solo2.
My Location
S.Wales
How did that installer manage to climb the ladder with his spurs on in the 1st place! :-rofl2

Pink Floyd comes too mind:)
 
Top