Show:
Stairway
to Heaven
Story For
the Ages
Window to
Your Soul
Plan Set
Ayyyy!
Don't Touch
the Third Rail
100

Maximum riser height

7-3/4"

100

BDP CO.

S# 1293A12415

1993

100

What does EERO stand for?

Emergency Escape & Rescue Opening

100

What does ABAG stand for?

Associate of Bay Area Governments
100

Minimum guard height

42 inches

Except

34-38 inches for handrail guard

200

Minimum tread depth
(with nosings)

10 inches

200

Kenmore

S# A02505253

2002

200

Minimum EERO width

20 inches

200

Minimum size of a bearing plate

3-inch x 3-inch
(1/4" thick)

200

Maximum guard opening size

4 inches 

Except
4-3/8" on stairs
6" at triangular stair area

300

Minimum tread depth
(without nosings)

11 inches

300

Lennox

S# 1721G3457

2021

300

Minimum EERO height

24 inches
300

Plan Set A applies to buildings
with cripple walls __ feet or less

4-feet

300

Height at which guards are required

30 inches for any part within 36 inches

400

Maximum riser & tread deviation

3/8"

400

York

S# W1D7611971

2017

400

Minimum EERO area, sill > 44"

5.7 square feet

400

Plan Set A applies to a
maximum of __ stories

2 stories

400

Minimum guard strength

200 pound point load

(Applied downward or outward)

500
Min. & max nosing projection

Minimum = 3/4 inch

Maximum = 1-1/4"

500

Bradford White

S# AF11502053
(ANSI Z21.10.1b-2020)

2024

500

Minimum EERO area, sill ≤ 44

5.0 square feet

500

Minimum plywood thickness & type

1/2" (15/32), 5-ply, exterior grade

500

Minimum infill strength

50 pounds over 1 sf area