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    Stair Stringer Design

    Uploaded by

    Terry Cheuk
    This document summarizes the structural analysis of a stair stringer with a span of 3 meters. It determines that a 250 x 16 mm steel plate satisfies the strength and serviceability requirements for the stringer. The plate has sufficient plastic modulus and moment capacity compared to the calculated moment on the stringer. It recommends using this 250 x 16 mm steel plate with 2 M16 bolts and a 10mm thick cleat plate to connect the stringer.

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    Stair Stringer Design

    Uploaded by

    Terry Cheuk
    156 views2 pages
    This document summarizes the structural analysis of a stair stringer with a span of 3 meters. It determines that a 250 x 16 mm steel plate satisfies the strength and serviceability requirements for the stringer. The plate has sufficient plastic modulus and moment capacity compared to the calculated moment on the stringer. It recommends using this 250 x 16 mm steel plate with 2 M16 bolts and a 10mm thick cleat plate to connect the stringer.

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    STAIR STRINGER DESIGN

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    This document summarizes the structural analysis of a stair stringer with a span of 3 meters. It determines that a 250 x 16 mm steel plate satisfies the strength and serviceability requirements for the stringer. The plate has sufficient plastic modulus and moment capacity compared to the calculated moment on the stringer. It recommends using this 250 x 16 mm steel plate with 2 M16 bolts and a 10mm thick cleat plate to connect the stringer.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    156 views2 pages

    Stair Stringer Design

    Uploaded by

    Terry Cheuk
    This document summarizes the structural analysis of a stair stringer with a span of 3 meters. It determines that a 250 x 16 mm steel plate satisfies the strength and serviceability requirements for the stringer. The plate has sufficient plastic modulus and moment capacity compared to the calculated moment on the stringer. It recommends using this 250 x 16 mm steel plate with 2 M16 bolts and a 10mm thick cleat plate to connect the stringer.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    of 2

    ST2

    Span = 3.00 m

    Stair DL = 0.5 kPa x 0.55 m = 0.275 kN/m


    LL = 4 kPa x 0.55 m = 2.2 kN/m

    Beam s/w = 0.40 kN/m


    Wser = 2.88 kN/m
    Wlimit = 4.11 kN/m

    M* = 4.62 kN-m End R = 6.17 kN

    Try 250 x 16 Plate,

    16 x 250 3
    Ix = = ### mm4
    12
    Iy = 8.53E+04 mm4
    G= 80000 MPa
    J= 341333.3 mm4

    δSer= 0.73 mm ( L / 4122 ) OK

    Zx,top = 41666.67 mm3

    250 250
    le = = 15.6
    16 250

    lep = 8 ley = 22

    The Section is NON-COMPACT

    Zc = 2.50E+05 mm3
    Ze = 1.37E+05 mm3

    Ф Ms = 30.72 kN-m
    Mo = 22.61 kN-m

    am = 1

    as = 0.473
    Ф Mcap = 14.52 kN-m > 4.62 kN-m OK

    ADOPT 250 X 16 PLATE FOR STAIR STRINGER


    Use 2-M16 8.8/s BOLTS 10mm CLEAT PLATE

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