Frequently Asked Questions


Hemispherical Domes
What diameters are available? Any diameter from 8'0" to 36'0".
What materials are used? Domes are made from 24-gauge Galvalume steel or Baked Enamel over Galvanized material. Domes are frequently made in a variety of colors. We can customize any color or finish to the needs of the customer.
Can I paint the dome myself? Yes. The dome can be purchased with a "Washcoat" over galvanized. The washcoat is a paint primer. With a simple wipe down the sheet is ready for paint.
What makes your product special? The DeMuth Hemispherical Dome is "self-supporting"; it does not require any superstructure for erection. It is a "free-standing" product.
How do you attach your dome to a structure? There are a variety of anchoring and/or attachment systems available to meet the numerous design applications for this product. After a review of your plans, we will recommend a system that best meets your application.
Is any special re-inforcing needed with your roof? Depending on the diameter, the geographic and physical location, Re-inforcing Kits are available. These kits are designed to "hug" the inside wall of the dome and can be applied without detracting from the "effect" of the dome.
Is the dome weatherproof? The dome can be weatherproofed with the application of a top grade of clear caulk at each seam.
Can the dome be insulated? Yes. There are several ways to apply insulation. After reviewing your plans, we will recommend a particular application.
Where are your domes made? Depending on your application and location, the dome will be manufactured in either Waterloo, Ontario or Leola, Pennsylvania. Both facilities have competent professionals to help in the application and manufacture of a dome roof to meet your needs.
Industrial Ladder and Cage Systems
What safety standards are met? DeMuth ladder and cage systems meet both OSHA and ANSI standards.
What materials are used? Box Beam Uprights are manufactured from G90, 16 ga., galvanized inset channel. Rungs are galvanized 1" dia. welded tubing with a knurled surface.
How do I know what to order? Simply measure the total height from the ground to the step-off point and DeMuth will ship all the components required to comply with safety regulations along with complete assembly drawings.
Tensioning Rods and Lugs
What lengths and diameters are available? Lengths are available from 12' to 20'. Diameters are available from 1/2" to 1".
What coatings are available? Zinc electro-galvanizing with either a clear chromate (silver) or dichromate (gold) conversion coating. Other types of coatings are available upon request.
What is the thread length? The length ranges from 4" to 6".
What strength rods are available? DeMuth offers standard tensioning rods at 40,000 PSI minimum yield strength with 20% elongation in 8" and  9/16" diameter at 60,000 PSI minimum strength yield at 20% elongation in 8". We can supply other diameters.
What type of lug should I order? Demuth will supply lugs and nuts to match the rod strength and the field application.

For information on any of our products just call us toll-free at 1-800-814-6324
or send us a quick email using our handy online form – click here.

DeMuth Steel Products inc.

  • Leola, PA (717) 656-4295
  • Rockford, IL (800) 814-6324
  • Waterloo, ON (519) 884-2980


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