|
Table 11.3.1 Applicability of Adjustment Factors for Connections
<br />AS[)
<br />Only
<br />ksl) and LRFD
<br />LRFD
<br />Onh•
<br />_
<br />a
<br />V
<br />L
<br />.C-,
<br />L
<br />C
<br />E
<br />n
<br />_
<br />c
<br />2
<br />K
<br />Lateral Loads
<br />Dowel -type Fasteners
<br />ce.g bolts_ lap screws_ wood screws.
<br />Z = Z x
<br />C u
<br />Cst
<br />C,
<br />CC. C., -
<br />C� -
<br />Ca, C,,, 3.32 0.65
<br />k
<br />nails, spikes, drift tx)lt� & drib pins)
<br />Split Ring and Shear Plate
<br />P = P x
<br />Cl,
<br />CM
<br />C,
<br />C9 C, Cd
<br />- C'
<br />- - 3.32 0.65
<br />Connectors
<br />Q = Q x
<br />Co
<br />C%f
<br />C,
<br />C C., Cd
<br />- -
<br />- - 332 0.65
<br />k
<br />P = P x
<br />Cu
<br />CM
<br />Cr
<br />- - -
<br />- C,;'
<br />- - 332 0.65
<br />k
<br />Timber Rivets
<br />Q = Q x
<br />I Cu
<br />CM
<br />Cr
<br />- C, -
<br />-C„'
<br />- - 332 0.65
<br />k
<br />Spike Grids
<br />Z = Z x
<br />I Ct,
<br />C„
<br />C
<br />- C., -
<br />- -
<br />- - 332 0.65
<br />l�
<br />%% ithdratt al Loads
<br />1 Nails, spikes, lag screws, W' = W x Cu Csl' C, - C-4 - - C,,, 332 0.65 k
<br />wood screws, & drift ptns
<br />1 the load duration factor, C,,, :hall not exceed 1 h for connecums i see 11 3 2 )
<br />The wet service factor. CM, shall noL appfv to foe -nails loaded in xithdrswal f see 12.5 4.1)-
<br />3 specific rnfannauon concemrng Senate" factors C.., pene"ton depth [actors C,r, end grain factors, C_ metal side plate factors. C., draphr2pm factors, Ce.
<br />and toe -part factors. C_ is provided in Chapters 12, 13, and 14.
<br />4 1 he metal side plate factor, C., is only applied when rivet capacity I t :, Q,) cmLrols (ser Chapter 14 )
<br />5 Me gmmetry factor. C,, is only applied wtLcn wrwd capacity 0_ contmLs I see Chapter 141
<br />11.3.2 Load Duration Factor, CD(ASD Only)
<br />Reference design values shall be muluphed by the
<br />load duration factors, Cat <_ 1_6, specified in 23.2 and
<br />Appendix B, except when the capacity of the connec-
<br />tion is controlled by metal strength or strength of con-
<br />crete/masonry (see 11.2.3. 11.2.4, and Appendix B3)-
<br />The impact load duration factor shall not apply to con-
<br />nections
<br />iL3.3 Wet Service Factor, CM
<br />Reference design values are for connections in
<br />wood seasoned to a moisture content of 19% or less and
<br />used under continuously dry conditions, as in most cov-
<br />ered structures. For connections in wood that is unsea-
<br />soned or partially seasoned, or when connections are
<br />exposed to wet service conditions in use, reference de-
<br />sign values shall be multiplied by the wet service fac-
<br />tors, C., specified in Table 11.3.3.
<br />11.3.4 Temperature Factor, Ct
<br />Reference design values shall he multiplied by the
<br />temperature factors, C,, in Table 1 1.3.4 for connections
<br />that will experience sustained exposure to elevated
<br />temperatures up to 150*F (see Appendix Q,
<br />
|