How do I make sure it stays where it is supposed to?

Pointers on anchoring, what kind of things will impact holding power of anchors,
anchoring after moving a structure

A phrase Norm has used thousands of times in his career is, “There is no such thing as too many anchors.” We consider it important to help customers understand the aerodynamics involved with a greenhouse shape.

The relatively small cost of the anchors is a short-lived savings after a building has blown away or shifted. By understanding and implementing what is required you can ensure a long term usage of your structure.

The job of your anchoring system is to counter the three aerodynamic forces working on your building.

  • Down force is usually seen as snow load
  • Up lift and lateral shift are forces typically associated with wind load
  • Wind going over a structure creates lift similar to wind going over an airplane wing

The first thing you will need to assess is what you are actually working with. If you have bedrock close to the surface, you have large rocks, or you have straight sand, it will impact your options for anchoring.

The actual holding power of your soil is an important consideration. Soil that has been recently excavated has considerably less holding power than soil that has not been moved in a long time.

The total surface area of an anchor post in contact with the soil is an important consideration. Large and short may have more contact area than long and slender.

When anchors can be used in alternating directions, it will multiply their individual holding power.

Wet soil usually does not have the same holding capacity as well drained soil. An important consideration here is rainwater which is shed by the building. As an example, with a 16’ wide structure, 8’ of rainwater goes each way. This means that the narrow area next to your building get 8 times the rain that the rest of the property gets. If you have poorly draining soil, this could be a potential problem.

If you are planning to use the movable structure option, proper anchoring has some additional challenges. Since your building is vulnerable to sudden increases in wind during this process, your anchoring protocol needs to be done quickly. Always do a test in the new area to confirm what you will be working with. With the quickness that is required, there is also a reminder that taking shortcuts will come back to haunt you.

We would like to reiterate, “If you are not 110% sure, please ask” There is no situation out there that is so unusual that we have not already been through it.

Your long term success is very important to us!

We hope you are finding value in this series of posts, helping you prepare for your new growing adventure! Reminder that the deadline is May 31st for Fall Delivery. We look forward to working with you for your projects!

Greenhouse Q&A Tuesday

Tuesday January 26th 10am-2pm EST

https://fb.me/e/13mzQ4upi

Norm and Andie will be hosting a Q&A for greenhouse week where you can drop in and have your questions answered (or send them in advance to multisheltersales@gmail.com)

Norm will also be offering a few 10-15 min tutorials with Q&A to follow each.

Norm’s Tentative Workshop Schedule
All times EST

1015-1030 Creating a More Efficient Structure
1030-1045 Q&A

11-1115 Hanley & Modified Hanley
1115-1130 Q&A

1145-12 Season Extension: Moving A Structure
12-1215 Q&A

1230-1245 There’s No Such Thing as Too Many Anchors!
1245-1 Q&A

115-130 Season Extension: Ventilation
130-145 Q&A

anyone who shows up live will be entered in a draw to win a paperback copy of the book as well as other swag!

You can also get your free copy of the ebook from Jan 25-29th https://tinyurl.com/y2tecydt

There will be a few free giveaways for people who drop by as well. We look forward to having you join us!

Just a reminder, this event is capped at 50 attendees throughout the day, so arrive early to avoid disappointment, and keep checking back throughout the event as people leave, more will be admitted. Thank you for your interest! We look forward to sharing the time with you!

Join Zoom Meeting
https://us02web.zoom.us/j/82502130173?pwd=R2NmZzY5TlM0ck92MU8zNVFPazR0QT09

Meeting ID: 825 0213 0173
Passcode: 262465

Video: Installing Anchors into a Base Beam

The main function of anchors is to prevent uplift. Do not forget about the “foundation function” as well which is meant to prevent settling or lateral shifting.

Improperly anchoring a building from up lift, down force and lateral movement will all, equally, cause problems and expense.

There are many different ways of anchoring a building because there are so many circumstances which people are dealing with.

When anchors can be installed at opposing angles, they work against each other and therefore will multiply their  holding power.

  • Care must be taken to stay away from anchors that will bend (i.e. re-bar).
  • When the anchors are going straight into the ground, care must be taken to ensure proper holding power. This is most often done with plugs of concrete.
  • When anchors have been extended out of the ground, care must be exercised to eliminate the possibility of outward lean.
  • It is important to consider the total amount of square inches of contact area between anchors and soil. Many time fewer big anchors is less holding power.

One thing which simply can not be stressed enough is that there simply is no such thing as too many anchors. Anchors are generally very inexpensive, especially when you are looking with hind site at some damage.

For more details and to watch an illustration, please see our YouTube Video below