independent | AiDomes

This article covers Ai’s 48′ Dome Panel’s Load Test.

load test

48′ Dome Panel Load Test

load of almost four tons of sand & bags of Portland Cement on panel

The above photo shows the additional 40 bags of Portland cement that were set on top the sand loaded panel, bringing the total weight on the panel to almost four tons. The center deflection increased to less than 3/8 inch. The grand total deflection of less than 3/8 inch with almost four tons of weight was astonishing to us. Our panel withstood 170 lbs. per sq. ft. of load.

Q: Do you have an engineering statement about your dome panels that can be submitted to my building department?

A:  Yes, to view the statement click on Engineering.

In October 2000 Ai performed a load test on one of its 48′ triangular shaped prefab building kit panels. The test was performed on Ai’s largest panel using the standard 7″ thick E.P.S. insulation, ¾” thick concrete exterior reinforced with galvanized steel mesh and a fiber reinforced plaster on the interior. The strength of the component panel can best be determined by measuring the deflection of the panel as a load (weight) is applied in increments. The panel was placed horizontal. Its weight and the weight of everything placed on it was only supported along the outer edge of the panel. The loading of the panel was done by adding sand in 470 lb. increments. Plywood sides were attached to the panel edges so sand could be spread evenly, providing a uniform load.

The deflection was measured in the center and six other locations. At all measured points a steel ruler was attached to the panel extending high enough to be visible when the panel was fully loaded with sand. A surveyor’s transit allowed the engineer to measure the deflection.

After 3,783 lbs. of sand was dumped on the panel its center had deflected less than 1/16 inch. Three days later, the deflections had only increased to 3/32 inch. Our own amazement at the strength made us even braver; so we cut through the interior plaster on the bottom of the panel. Even then the deflection was less than 3/16 inch.

Ai had not expected this exceptional strength. We could not mound the sand any higher so we set a pallet of 40 cement bags on top of the sand thinking, “This could do the panel in.” That doubled the weight and the center deflection increased to less than 3/16 inch.

The grand total deflection of less than 3/8 inch with almost four tons of weight was astonishing to us.

A 120-mph wind will exert a pressure of 30 lbs. per sq. ft. on a vertical wall and a snow load exceeding 90 lbs. per sq. ft. is rare. Typically snow loads are 20 to 50lbs. per sq.ft.  American Ingenuity’s triangular shaped 48′ component panel withstood 170 lbs. per sq. ft.

load test 2

This picture was taken after Ai had loaded 3,783 lbs. of sand onto our 48′ dome panel. After the sand was dumped on the panel its center had deflected less than 1/16 inch. Three days later, the deflections had only increased to 3/32 inch. Our own amazement at the strength made us even braver; so we cut through the interior plaster on the bottom of the panel. Even then the deflection was less than 3/16 inch.

The men in the photo from left to right are:

  • Michael Busick, inventor of American Ingenuity’s building panel and building method
  • Luke Miorelli, mechanical engineer
  • An engineer who was an independent observer
  • Leo Cherbano, American Ingenuity’s plant manager

 I would like to completely bury the dome. Is this possible? 

  • Ai does not recommend this; however iIf you want your Ai dome completely covered with soil, let us know the depth and Ai will quote a fee to hire local engineer to calculate load of the soil, determine rebar spacing that will be installed on top of the finished dome, depth of concrete to be gunited on to the dome and what posts will be needed to support the weight of the soil and concrete on the dome.
  • A dome like an arch, increases its effectiveness as it is compressed so it will support partial earth berming or any snow load. We have fortified our reinforced concrete with space-age fibers and special admixtures, as well as galvanized steel. As the panels of the dome are assembled, the beveled seams between them are concreted, creating a network of interlocking arches of structural beams.
  • Our dome lends itself very well to earth berming because of the strength of the dome shape and the totally concrete exterior wall, with no materials to rot. Ai’s domes have been bermed with as much as 4 feet of backfill. However, if you earth berm your dome, install a drain system to draw water away from the foundation. Plans for this french drain system are included with our basement plans.
  • The Ai Dome could be bermed higher or even buried, but we do not recommend it because the additional expense of labor and extra concrete would probably not be worth the gain. A dome or a structure that is not buried would never have to withstand loads greater than 100 lbs. per sq.ft. If a structure is buried the earth could put loads in excess of 500 lbs. per sq.ft.  Ai does not design our standard dome for those extreme conditions that would normally never occur.  However the dome can designed to withstand these loads.
  • Four feet is the maximum height of back fill that can go back against the dome as currently designed. Back fill higher than this would cause more expense and complications than is likely to be worth while. Consider landscaping with plants to enhance the appearance that you want.
 South Carolina Dome Home Has Sold For $224,000
The full selling price.

The following is the sales information that was presented to the public in 2006.  To view photo gallery of the dome click on South Carolina Dome.

snow Kolb beautiful

One Owner-Builder of an American Ingenuity dome complex is planning to relocate to Florida. He sold his dome complex in the Greenville/Spartanburg area of South Carolina.

The dome complex consists of one fully furnished 40’ dome home (2 Bedroom, 2 ½ bath 1,600 sq.ft.) linked to a 27’ two car garage with a 12’ utility dome and a dog dome.

These domes are situated on the high point of 6.9 acres of land. 5.5 acres are pasture land, 1.4 acres are hardwood forest. The domes sit on a hill with a gorgeous view.

KOLB PROPERTY DETAILS

This dome home consists of an American Ingenuity 40′ dome linked to a 27′, two car garage. The garage first floor is 555 sq.ft. with a 16 foot wide overhead door and a 680 sq.ft. attic. The attic floor is fully suspended from the dome shell so there are no columns or supporting walls to interrupt the garage first floor.

Dome Home Features:
• Fully furnished with quality items including two king size beds and a solid wood book wall from Denmark.
• Draperies by ADO – “Draperies with the Gold Thread.”
• Jacuzzi
• Non-vented gas log fire place.
• Flooring: combination of laminate “hardwood style”, tiles and Berber carpet.
• Heating/Cooling: by means of a Geothermal heat pump, using latent sun energy which is stored in the ground with 1,000 feet of hermetically sealed special plastic pipe loop, at a 6 feet depth.
• Water Heating: tank-less, on-demand propane gas water heater unit.

Construction: Steel reinforced concrete shell with 7” thick E.P.S polystyrene insulation.

Insulation value: R-28 which is comparable to 11” of fiberglass insulation.

Construction complies with 1995 CABO Code, One/two Family Category. This dome has been occupied by the original owner since April 30, 2002.

This Geodesic Dome Home is super energy efficient with a low environmental impact. It has been tested by a third party independent testing company and was subsequently certified as an ENERGY STAR HOME by EPA. The home actually uses 61 percent less energy than a comparably sized home.

To view info and pics about his geo thermal pipes and water furnace, click on GeoThermal.


THIS DOME HOME SOLD AUGUST 12, 2006

FOR THE FULL SELLING PRICE

Image Image

SOUTH CAROLINA DOME HOME for $224,000

The following is the sales information that was presented to the public in 2006. 

One Owner-Builder of an American Ingenuity dome complex is planning to relocate to Florida. He has decided to sell his dome complex in the Greenville/Spartanburg area of South Carolina.

The dome complex consists of one fully furnished 40’ dome home (2 Bedroom, 2 ½ bath 1,600 sq.ft.) linked to a 27’ two car garage with a 12’ utility dome and a dog dome. A concrete foundation for a 34’ screen dome is connected to the 40’ dome. 

Image Image

These domes are situated on the high point of 6.9 acres of land. 5.5 acres are pasture land, 1.4 acres are hardwood forest. The domes sit on a hill with a gorgeous view.

 KOLB PROPERTY DETAILS

This dome home consists of an American Ingenuity 40′ dome linked to a 27′, two car garage. The garage first floor is 555 sq.ft. with a 16 foot wide overhead door and a 680 sq.ft. attic. The attic floor is fully suspended from the dome shell so their are no columns or supporting walls to interrupt the garage first floor.

Dome Home Features:

  • Fully furnished with quality items including two king size beds and a solid wood book wall from Denmark.
  • Draperies by ADO – “Draperies with the Gold Thread.”
  • Jacuzzi
  • Non-vented gas log fire place.
  • Flooring: combination of laminate “hardwood style”, tiles and Berber carpet.
  • Heating/Cooling: by means of a Geothermal heat pump, using latent sun energy which is stored in the ground with 1,000 feet of hermetically sealed special plastic pipe loop, at a 6 feet depth.
  • Water Heating: tank-less, on-demand propane gas water heater unit.

Construction: Steel reinforced concrete shell with 7” thick E.P.S polystyrene insulation.

Insulation value: R-28 which is comparable to 11” of fiberglass insulation.

Construction complies with 1995 CABO Code, One/two Family Category.

This dome has been occupied by the original owner since April 30, 2002.

This Geodesic Dome Home is super energy efficient with a low environmental impact. It has been tested by a third party independent testing company and was subsequently certified as an ENERGY STAR HOME by EPA. The home actually uses 61 percent less energy than a comparably sized home designed to the 1993 Model Energy Code standard.

Image

This home is super strong and is designed to withstand the powerful forces of nature. A limited guarantee assures against any structural storm damages as a result of the ravages of tornados, earth quakes and hurricanes. The dome will survive wild fires.

For the year 2003, the monthly average electrical cost was $48.88. This cost includes: heating and cooling, well pump operation, hot water heating, cooking, laundry and sanitary. Typically the heating and cooling costs are about one half of the total electric bill.

Water is a deep well which is sunken into granite rock for purest, unpolluted natural water.

Dome surroundings: a system of six frost free garden hydrants, three European style garden lamps, one European masonry decorative garden grill, two decorative statues from Italy.

Patio: 34 feet diameter concrete platform with 3 electrical outlets and one hose hydrant.

Utility Dome: 12 feet diameter for utensils, lawn mover, water tank and filter.