ASD/LRFD Manual - American Wood Council

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ASD/LRFD MANUAL FOR ENGINEERED Wood Construction 87 M11.5 Adjustment of Reference Design Values Dowel-type connections must be designed by applying all applicable adjustment factors to the reference withdrawal design value or reference lateral design value for the connection. NDS Table 10.3-1 lists all applicable adjustment factors for dowel-type connectors. Table M11.3-1 shows the applicability of adjustment factors for dowel-type fasteners in a slightly different format for the designer. Table M11.3-1 Applicability of Adjustment Factors for Dowel-Type Fasteners 1 Allowable Stress Design Load and Resistance Factor Design Lateral Loads Dowel-Type Fasteners Z′ = Z C D C M C t C g C ∆ C eg C di C tn Z′ = Z C M C t C g C ∆ C eg C di C tn K F φ z λ Withdrawal Loads Nails, Spikes, Lag Screws, Wood Screws, and Drift Pins W′ = W C D C M C t C eg C tn Z′ = Z C M C t C eg C tn K F φ z λ 1. See NDS Table 10.3.1 footnotes for additional guidance on application of adjustment factors for dowel-type fasteners. Example of a Dowel-Type Fastener Loaded Laterally Example of a Dowel-Type Fastener Loaded in Withdrawal For a single dowel-type fastener installed in side grain perpendicular to the length of the wood member, meeting the end and edge distance and spacing requirements of NDS 11.5.1, used in a normal building environment (meeting the reference conditions of NDS 2.3 and 10.3), and not a nail or spike in diaphragm construction, the general equation for Z′ reduces to: for ASD: Z′ = Z C D for LRFD: Z′ = Z K F φ z λ M11.6 Multiple Fasteners For a single dowel-type fastener installed in side grain perpendicular to the length of the wood member, used in a normal building environment (meeting the reference conditions of NDS 2.3 and 10.3), the general equation for W′ reduces to: for ASD: W′ = W C D for LRFD: W′ = W K F φ z λ Installation Requirements To achieve stated design values, connectors must comply with installation requirements such as spacing of connectors, minimum edge and end distances, proper drilling of lead holes, and minimum fastener penetration. 11 M11: DOWEL-TYPE FASTENERS Local stresses in connections using multiple fasteners can be evaluated in accordance with NDS Appendix E. American Forest & paper association
88 M11: DOWEL-TYPE FASTENERS American Wood Council
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2005 EDITION ASD/LRFD MANUAL MANUAL
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Updates and Errata While every prec
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ii ASD/LRFD MANUAL FOR ENGINEERED W
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iv ASD/LRFD MANUAL FOR ENGINEERED W
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viii ASD/LRFD MANUAL FOR ENGINEERED
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ASD/LRFD MANUAL FOR ENGINEERED Wood
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M1: general requirements for struct
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M2: DESIGN VALUES FOR STRUCTURAL ME
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M3: Design Provisions and Equations
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M3: Design Provisions and Equations
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10 M3: Design Provisions and Equati
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12 M4: SAWN LUMBER M4.1 General Pro
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14 M4: SAWN LUMBER M4.4 Special Des
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16 M4: SAWN LUMBER Table M4.4-3 Coe
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18 M4: SAWN LUMBER Table M4.5-1a AS
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20 M4: SAWN LUMBER Table M4.5-2b AS
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22 M4: SAWN LUMBER Table M4.5-3a AS
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24 M4: SAWN LUMBER Table M4.5-4c AS
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26 M4: SAWN LUMBER Column Capacity
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28 M5: structural glued laminated t
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34 M6: ROUND TIMBER POLES AND PILES
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138 M16: FIRE DESIGN NER - 392 WTCA
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140 M16: FIRE DESIGN Area Separatio
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142 M16: FIRE DESIGN type of assemb
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144 M16: FIRE DESIGN Table M16.1-10
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146 M16: FIRE DESIGN Compression Me
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156 M16: FIRE DESIGN Example 16.2-1
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158 M16: FIRE DESIGN For the fire d
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160 M16: FIRE DESIGN Figure M16.3-5
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American Forest & Paper Association
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ASD/LRFD Manual - American Wood Council

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