1970 BOCA basic building code - stairs

[fisher]

Need to establish requirements for stairs (means of egress) in 1974 and think that would be as in 1970 BOCA Basic Building Code. Can anyone point me in the right direction or have a copy that they could scan and forward to me? Thanks.

 

[cda]

Welcome

There are some old timers and also code book collectors

Might be sometime Monday or after.

Can you be more specific what you need???

when required?

size ?

tread?

Or other question?

 

[ADAguy]

Type of building, number of stories?
Existing condition you are concerned about?

 

[rogerpa]

1975 BOCA unchanged from 1972 BOCA. I don't have anything earlier.

SECTION 616.0 INTERIOR EXITWAY STAIRWAYS

616.1 Capacity: The capacity of stairways and doors per unit of exit
width shall be computed in accordance with Section 608.0. .

616.2 Minimum dimensions

616.2.1 Width: All interior exit way stairways shall be not less than
forty-four (44) inches in width, except that such width may be reduced
to thirty-six (36) inches in buildings of single exit construction when permitted by Section 609.3.

616.2.2 Headroom: The minimum headroom in all parts of the stair
enclosure shall be not less than SIX and two-thirds (6-2/3) feet.

616.2.3 Restrictions: stairways shall not reduce in width in the direction of exit travel.

616.3 Landings and platforms

616.3.1 Width: The least .dimension of landings and platforms shall be
not less than the width of stairway.

616.3.2 Vertical rise: In buildings of use group A (assembly) and use
group I (institutional) occupancy, the height of vertical rise shall not
exceed nine (9) feet between landings and intermediate platforms. In all
other buildings, a stairway shall not have a height of rise of more than
twelve (12) feet between landings.

616.4 Treads and risen

616.4.1 Minimum dimensions: The height of risers and width of treads
in inches shall be as indicated m the following Table 616.

Table 616

TREAD AND RISER SIZE

==============~~ ===~~~====~======

Use group Maximum riser Minimum tread*


Assembly and institutional 7-1/2" 10"

All others ~ 8" 9"
*All treads shall have a nosing or effective projection of 1". There shall not be a variation exceeding 3/16" in the height of risers.

616.4.2 Winders: Winders shall not be permitted in required exitway stairs, except that in one- and two-family dwellings and in ornamental stairways not required as an element of an exitway, treads with a minimum width of four (4) inches and an average width of nine (9) inches may be permitted.

 

[steveray]

Specific question would help....

 

[ADAguy]

Welcome Fisher

Specific reason for you inquiry? Did you fall? What type of building?

 

[cda]

I think Fisher gave up???

 

[rgrace]

I think Fisher gave up???

I think you're right .....

I have a copy of the 1970 BOCA Basic Building Code