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DISH SETUP: Single sat, Multi-Sat & Motorised
Filling the pole/tube/mast with concrete?
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<blockquote data-quote="Terryl" data-source="post: 957442" data-attributes="member: 369937"><p>Well the reasoning behind putting concrete in the pole is to add rigidity to it, think of it this way.</p><p></p><p>Ttake a pole that is 10 to 15 feet long (3 feet or so underground embedded in concrete) now add the 100 to 200 pounds of dish and polar mount to the very top and offset it to one side and you have a big load on the base, now take a look at the sail area of this dish it can be 10 to 15 square feet or more, and it moves back and forth, even more in the wind.</p><p></p><p>At the very base of the pole where it first enters the concrete base is where all the action is going on, with the offset load and the motion of the dish as it pans plus any severe wind loads this adds up to a lot of stress at this point, over time the stress can cause micro fractures and it very well could fail if it is also attacked by water from both inside and outside.</p><p></p><p>On some of the very large dishes I have installed there is an extra thick collar around the last ten to twelve inches of mast for support for the motors if it is a movable dish, and we still fill it to a point above this collar for extra support.</p><p></p><p>Now you could use a thicker walled pipe, but how many of you have tried to lift a 10 foot 4" schedule 80 pipe up to drop it into a hole 24 to 36 inches deep?</p><p></p><p>It's not a one man job.</p></blockquote><p></p>
[QUOTE="Terryl, post: 957442, member: 369937"] Well the reasoning behind putting concrete in the pole is to add rigidity to it, think of it this way. Ttake a pole that is 10 to 15 feet long (3 feet or so underground embedded in concrete) now add the 100 to 200 pounds of dish and polar mount to the very top and offset it to one side and you have a big load on the base, now take a look at the sail area of this dish it can be 10 to 15 square feet or more, and it moves back and forth, even more in the wind. At the very base of the pole where it first enters the concrete base is where all the action is going on, with the offset load and the motion of the dish as it pans plus any severe wind loads this adds up to a lot of stress at this point, over time the stress can cause micro fractures and it very well could fail if it is also attacked by water from both inside and outside. On some of the very large dishes I have installed there is an extra thick collar around the last ten to twelve inches of mast for support for the motors if it is a movable dish, and we still fill it to a point above this collar for extra support. Now you could use a thicker walled pipe, but how many of you have tried to lift a 10 foot 4" schedule 80 pipe up to drop it into a hole 24 to 36 inches deep? It's not a one man job. [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Filling the pole/tube/mast with concrete?
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