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1970 BOCA basic building code - stairs

Discussion in 'Existing Buildings Codes' started by fisher, Nov 3, 2019.

  1. fisher

    fisher Registered User

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    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.
     
  2. cda

    cda Sawhorse

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    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?
     
  3. ADAguy

    ADAguy Sawhorse

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

    rogerpa Silver Member

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    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.
     
  5. steveray

    steveray Sawhorse

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    Specific question would help....
     
  6. ADAguy

    ADAguy Sawhorse

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    Welcome Fisher

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

    cda Sawhorse

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    I think Fisher gave up???
     

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