Search Our Site

Major Metal Cast Aluminum and Cast Iron Structural Stair Treads - Specification Guidelines
Stair Treads are available in Cast Aluminum and Cast Iron.

Minimum Thickness Table for Structural Treads
Span To 4'-0" To 5'-0"
All Metals 1/2" (12.7 mm) 5/8" (15.88 mm)
 Note: Thicknesses are minimum for casting purposes and not always sufficient for structural strength.  
 

Standard Hole Spacing for Treads with Lugs - Hole Spacing for self-supporting treads. Maximum length 5'-0". All treads are cast with truss ribs when required.

 

.

TYPE 105
Shown attached to carrier angles. Nose and toeplate has been drilled for closed riser plates. Types 103, 104, 105A, 105, 106A, 107A, and 117 can be drilled for attachment to carrier angles.

TYPE 117A
Shown with end lugs for mounting directly to stair stringer. No carrier angles are required. Types 105, 106, 107 and 117A can be used this way.
 

 

Note:

1. Platforms manufactured in sections. Contact The Mat King for further information.
2. Toeplates are added as required.
3. Matching nosing are used on treads and platforms.
4. Truss ribs are added when required when required for structural strength.
5. Cast Iron Treads and platforms are furnished pained black. Other metals have shot-blasted finish.
6. Standard surface finish is abrasive cross hatched. Plain and fluted surfaces are also available.
7. Supporting structural steel and fasteners are "by others."
8. Various tread styles are available for attaching to carrier angles, or bolting directly to stair stringers.
9. Sections are not "to scale."
10. Attachment hole spacing for treads and platforms is "as detailed" for each job.
11. Structural treads are custom made per application.
12. Lead time to be determined per application.
13. Maximum structural tread length 5'-0". Consult The Mat King.
Maximum Length versus Depth - To be used as a guide when developing a specification or bid request. Platform recommended piece size. Consult The Mat King for details.
Type Number Metal Depth Thickness Structural Max Length Non-Structural Max Length Diagram
100 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"

asa

Type 100

Architectural Specifications

    6" to 12" 5/16" to 5/8" N/A 6'
101 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
101SP Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
102 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
103 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
104 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
110 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
116 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
116A Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
120 Cast Aluminum or Cast Iron 1.5" to 6" 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" N/A 6'
105  Cast Aluminum or Cast Iron 6" to 12" 1/2" to 5/8" 5' 6'
105-A Cast Aluminum or Cast Iron 1-1/8" Slanted 5/16" to 3/8" N/A 8'-6"

Architectural Specifications

    6" to 12" 5/16" to 5/8" 5' 6'
105-B Cast Aluminum or Cast Iron 1-1/8" Slanted 5/16" to 3/8" N/A 8'-6"
    6" to 12" 5/16" to 5/8" 5' 6'
             
106 Cast Aluminum or Cast Iron 4" to 6" 1/2" to 5/8" N/A 8'-6"
      6" to 12" 1/2" to 5/8" 5' 6'
107 Cast Aluminum or Cast Iron  10" to 12" 1/2" to 5/8" 5' 6'
107-A  Cast Aluminum or Cast Iron 10" to 12" 1/2" to 5/8" 5' 6'

117

  Cast Aluminum or Cast Iron

4" to 6"

1/2" to 5/8" N/A 8'-6"
   

6" to 12"

1/2" to 5/8" 5' 6'

117-A

Cast Aluminum or Cast Iron

4" to 6"

1/2" to 5/8" N/A 8'-6"
   

6" to 12"

1/2" to 5/8" 5' 6'

150

Cast Aluminum or Cast Iron 1.5" to 1.5"

3/8"

N/A 6'
           

250

Cast Aluminum or Cast Iron 2.5" to 2.5"

1/2"

N/A 6'
 
   

 
 
 

THE MAT KING
740 West End Avenue; Suite 1
New York, NY 10025 USA

Phone: (646)998-4208
Fax: (646)998-4073
Phone: (800)442-6544
Fax: (800) Mats-Fax (628-7329)

www.geoffreydrewmarketing.com www.geoffreydrewmarketing.com