Easy Riser® Design Parameters
Residential
40 PSF Live Load or 300lb Point Load at any location along
stringer
10 PSF Dead Load
Live Load Deflection Limited to L/360
Total Load Deflection Limited to L/240
Stringer Rise = 7 3/4" &
Stringer Run = 10" ONLY (38
degree slope)
42 Inch Wide Stairway with 2 Stringers (Dry
Use) Residential
| #2 Spruce-Pine-Fir | #2 Douglas Fir | #2 Southern Yellow Pine | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Max Run | Max Rise | Max Stringer Length | Max Run | Max Rise | Max Stringer Length | Max Run | Max Rise | Max Stringer Length | |
| 2x6 Stringer | 8'-1" | 6'-11" | 10'-2" | 8'-2" | 7'-0" | 10'-4" | 8'-7" | 7'-4" | 10'-10" |
| 2x8 Stringer | 10'-9" | 9'-0" | 13'-7" | 10'-11" | 9'-1" | 13'-9" | 11'-5" | 9'-6" | 14'-5" |
| 2x10 Stringer | 13'-3" | 10'-11" | 16'-9" | 13'-4" | 11'-0" | 16'-10" | 13'-8" | 11'-3" | 17'-3" |
| 2x12 Stringer | 15'-4" | 12'-6" | 19'-5" | 15'-6" | 12'-8" | 19'-7" | 16'-0" | 13'-0" | 20'-3" |
42 Inch Wide Stairway with 3 Stringers (Dry Use) Residential
| #2 Spruce-Pine-Fir* | |||
|---|---|---|---|
| Max Run | Max Rise | Max Stringer Length | |
| 2x6 Stringer | 8'-4" | 7'-1" | 10'-6" |
| 2x8 Stringer | 12'-5" | 10'-3" | 15'-8" |
| 2x10 Stringer | 16'-3" | 13'-3"** | 20'-7"** |
| 2x12 Stringer | 19'-6" | 15'-9"** | 24'-8" |
|
* #2 SYP Douglas Fir can be substituted for
#2 SPF |
|||
Commercial
100 PSF Live Load or 300lb Point Load at any location along
stringer
10 PSF Dead Load
Live Load Deflection Limited to L/360
Total Load Deflection Limited to L/240
Stringer Rise = 7" & Stringer Run = 11" ONLY (32 degree
slope)
42 Inch Wide Stairway with 2 Stringers (Dry Use) Commercial
| #2 Spruce-Pine-Fir | #2 Douglas Fir | #2 Southern Yellow Pine | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Max Run | Max Rise | Max Stringer Length | Max Run | Max Rise | Max Stringer Length | Max Run | Max Rise | Max Stringer Length | |
| 2x6 Stringer | 6'-2" | 4'-6" | 7'-4" | 6'-3" | 4'-7" | 7'-5" | 6'-5" | 4'-8" | 7'-7" |
| 2x8 Stringer | 7'-10" | 5'-7" | 9'-4" | 7'-11" | 5'-8" | 9'-5" | 8'-4" | 5'-10" | 9'-10" |
| 2x10 Stringer | 9'-8" | 6'-9" | 11'-6" | 9'-9" | 6'-10" | 11'-7" | 10'-0" | 6'-11" | 11'-10" |
| 2x12 Stringer | 11'-3" | 7'-9" | 13'-5" | 11'-5" | 7'-10" | 13'-6" | 11'-9" | 8'-1" | 14'-0" |
42 Inch Wide Stairway with 3 Stringers (Dry Use) Commercial
| #2 Spruce-Pine-Fir* | |||
|---|---|---|---|
| Max Run | Max Rise | Max Stringer Length | |
| 2x6 Stringer | 7'-6" | 5'-4" | 8'-11" |
| 2x8 Stringer | 9'-11" | 6'-11" | 11'-9" |
| 2x10 Stringer | 12'-3" | 8'-4" | 14'-6" |
| 2x12 Stringer | 14'-3" | 9'-7" | 16'-10" |
|
* #2 SYP Douglas Fir can be substituted
for #2 SPF
|
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