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Another Pivot ??

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=180554
Printed Date: 08 Sep 2025 at 1:27am
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Topic: Another Pivot ??

Posted By: FREEDGUY
Subject: Another Pivot ??
Date Posted: 15 May 2021 at 6:47pm

How big of a concrete pad is required for the "anchorage" point ? What is the biggest "stress" on the anchor point ?

Replies:

Posted By: kjs
Date Posted: 15 May 2021 at 7:17pm

About 8 x 8 With post holes in each corner.

Posted By: DMiller
Date Posted: 15 May 2021 at 7:29pm

Water comes in at pivot, Corrosion, Erosion from sitting still & dry, while running is only a modest amount of torque on them.

Posted By: JohnColo
Date Posted: 17 May 2021 at 6:25pm

My Mini Pivot, 610' long has a pad about 6'x6'. A few years ago a 120MPH gust blew it halfway over, Had to replace some of the pivot pipe but got it back down level. Make a point to always park it running east and west as the strongest winds seem to come from the west.

Posted By: FREEDGUY
Date Posted: 30 Oct 2021 at 8:03pm

Is there a "limit" on how many spans a pivot can have? I drove past a field that had 9 spans (this area has fields a mile + long) and wondered what the limitations were for length. Thanks

Posted By: kjs
Date Posted: 31 Oct 2021 at 10:52am

The limit on the spans is how much water can you supply to keep crop growing. I have seen a pivot a half mile long, 1750 gallons per minute. But in a dry year it can't pump enough water to keep the crop supplied. You would need about 3000+ gallons per minute to keep up.