A Beginner's Guide to the Steel Construction Manual, 14th ed. Chapter 3 - Tension Members © 2006, 2007, 2008, 2011 T. Bartlett Quimby
 Overview Slenderness Tensile Yielding Tensile Rupture Failure Path Tutorial Tensile Yielding & Tensile Rupture of Connecting Elements Bolt Bearing on Holes Block Shear Selecting Sections Tension Limit State Summary Example Problems Homework Problems References Report Errors or Make Suggestions Purchase Hard Copy

Section 3.9

Tension Limit State Summary

Last Revised: 07/30/2011

Serviceability Limit States:

 Limit State Specification Limit Slenderness D1 L/r < 300 or r > L/300

Strength Limit States:

All strength limit states take the form:

 LRFD ASD Pu < ftPn Pa < Pn/Wt Req'd Pn = Pu/ft < Pn Req'd Pn = Pa Wt < Pn Pu / (ftPn)  < 1.00 Pa / (Pn/Wt) < 1.00

Rn (nominal resistance) is often used in place of Pn (nominal axial strength) in the equations above.

 Limit State Specification Nominal Capacity Typical Design Variables f W Tensile Yielding D2(a)/J4.1(a) Member Capacity:FyAg Stl Type, Section 0.90 1.67 Tensile Rupture D2(b)/J4.1(b) Member Capacity:FuAe Stl Type, Section, Bolt size, Bolt Layout, Section modifications 0.75 2.00 Block Shear J4.3 Capacity per connection:min(0.6FuAnv + UbsFuAnt, 0.6FyAgv + UbsFuAnt) Stl Type, Section, Bolt Size, Bolt Layout, Section modifications 0.75 2.00 Bolt Bearing J3.10 Capacity per bolt hole:Std Holes, Defl an issue: min(1.2 Lct Fu, 2.4 dt Fu) Std Holes, Defl not issue: min(1.5 Lct Fu, 3.0 dt Fu) Stl Type, Section, Bolt Size, Bolt Layout, Section modifications 0.75 2.00

Notes:

1. See SCM B4.3 for requirements for computing Ag and An, and SCM D.3 for Ae.
2. SCM J4.1(b) places an upper limit of 0.85Ag on An for connecting elements.
3. Multiple failure paths may need to be considered for Tensile Rupture and Block Shear.
4. The least bolt bearing value in a connection controls the bolt bearing strength of the member.