Installation Guide

ManualsBrandsMylen STAIRS ManualsBuilding materialsHayden Black Interior 42" Diameter 10 Treads with 1 36" Tall Platform Rail Spiral Stair Kit

Mylen Code Stair Packages will address and meet compliancy with

each of the requirements that are listed below. This information will

apply to the BOCA Code, UBC Code, IRC, and IFC codes.

1. Minimum clear walking path of 26 inches. A 5-foot diameter or larger

stair will provide this width.

2. Each tread will have a minimum of 7 1/2-inch tread depth at 12 inches

from the narrow edge.

3. All Treads will be identical.

4. The tread rise shall not be more than 9 ½ inches high.

5. Minimum headroom of 6 foot 6 inches shall be provided, measuring

plumb from the edge of the platform down to the tread below

6. Landing width shall not be less than the required width of the stairway.

Minimum spiral stair tread width is 26 inches.

7. Stair balusters shall be spaced so a 4-inch object cannot pass between.

The IRC Code permits a 4 3/8-inch space.

8. Balcony / well enclosure guardrail balusters shall be spaced so a 4-inch

object cannot pass between.

9. Balcony / well enclosure guardrail height shall not be less than 36

inches. (If your state or municipality requires 42-inch tall guardrails, the

sales order must reflect this detail).

10. The stairway shall be equipped with one handrail on the wide edge of

the tread.

11. Handrail height, measured vertically from the tread nosing, shall not be

less than 34 inches and not more than 38 inches.

12. Handrail grip size. Type I-Handrails with a circular cross section shall

have an outside diameter of at least 1 1/4 inches and not greater than 2

inches. (Mylen’s standard circular handrail is 1 1/2 inch diameter. This

will address the UBC minimum cross section of 1 1/2 inch diameter.)

13. A 300 lb. concentrated load is required. On request, our sales

department can provide structural calculations for your job

specifications.

*Mylen’s standard code package does not address the open space between

each tread (open rise stair). If your local building code requires no more

than 4” space in this area, please call (855) 869-8594 to have riser bars

included in your order or speak with our customer support team for other

options.

BUILDING CODE SPECIFICATIONS

Visual Interpretation of IRC Code

Mylen Spiral Stairs Comply with National Building Codes

R311.5.8.1 Spiral Stairs. Spiral stairways are permitted, provided the

minimum width shall be 26 inches (660 mm) with each tread having a 7

1⁄2 inch (190 mm) minimum tread depth at 12 inches from the narrower

edge. All treads shall be identical, and the rise shall be no more than 9 1⁄2

inches (241 mm). A minimum headroom of 6 feet, 6 inches (1982 mm)

shall be provided (See above diagram).

Visit mylenstairs.com for more information or call (855) 869-8594 to speak with a

customer or product support member.

Handrail

Height

(34” Min. to

Max. 38”)

9 ½” Max.

Rise

Max. 4”

Sphere

Min.

Headroom

6’6”

Min. 36”

Platform Rail

Height

*4” Max.

Open Space

Summary of content (4 pages)

PAGE 1
BUILDING CODE SPECIFICATIONS Mylen Spiral Stairs Comply with National Building Codes Mylen Code Stair Packages will address and meet compliancy with each of the requirements that are listed below. This information will apply to the BOCA Code, UBC Code, IRC, and IFC codes. Visual Interpretation of IRC Code 1. Minimum clear walking path of 26 inches. A 5-foot diameter or larger stair will provide this width. 2. Each tread will have a minimum of 7 1/2-inch tread depth at 12 inches from the narrow edge. 3.
PAGE 2
Hayden Collection Technical Specification Guide Collection Overview Powder coated white, gray or black steel column sleeves, offered with either laminate wood treads and platform or color matched 3/8” steel treads and platform. The Hayden collection is offered with horizontal stainless steel line rail infill and color matched aluminum handrails and is suitable for loft installations. Either tread option is available with Anti-slip Traction Tread Covers.
PAGE 3
Hayden Collection Technical Specification Guide Walking Path Measurements The clear walking path is the measurement from the inside of the column to the inside of the handrail and will vary by model and diameter choice. Please refer to the following chart for more walking path measurement information. Stair Diameter Clear Walking Path 42” (3’6”) 60” (5’0”) 17” 26” Height Measurements The Hayden Collection is offered in various tread counts to cover a multitude of height application.
PAGE 4
Hayden Collection Technical Specification Guide Please call (855) 869-8594 or visit mylenstairs.com for additional product information, assistance or questions. Page 3 110.5” – 123.5” (12 Treads) 85” – 95” (9 Treads) 119” – 133” (13 Treads) 93.5” – 104.5” (10 Treads) 102” – 114” (11 Treads) 136” – 152” (15 Treads) 127.5” – 147.