Column and Brace Strength

AISC 360-16, LRFD — W, HSS, Pipe, Single Angle, Double Angle, Tee

Calculation Description

Description (member, location, project, notes):

1. Section

Column / Brace Type:

Section Designation: Only AISC imperial designations in the engineering database are listed.

Yield Strength Fy (psi):

Modulus E (psi):

2. Member and Loads

Effective Length Factor K:

Member Length H_col (ft):

Factored Axial Load P_u (lbs, negative = tension):

Factored Moment M_u_x (ft-lbs):

Factored Moment M_u_y (ft-lbs):

Laterally Unbraced Length L_b (ft, 0 = member length, -1 = continuously braced):

3. Flexure and Lateral-Torsional Buckling

K for LTB, K_LTB (W, HSS, Pipe):

Moment Gradient Modifier C_b (W, HSS, Pipe, L):

Constant c_ltb (W only, 1.0 for doubly symmetric I):

4. Load Eccentricity (Single Angle and Tee)

Eccentricity of the Axial Load:

Eccentric Portion of P_u, P_ecc (lbs, -1 = all of P_u is eccentric):

5. Single Angle Options

Chapter E5 Truss Route:

E5 Truss Type:

E5 Connected Leg:

E5 End Connections:

E5 Bolts at Each End:

Cm about Principal w-Axis (B1):

Cm about Principal z-Axis (B1):

Beta_w Override (0 = Table C-F10.1):

6. Double Angle Options

Orientation:

Gap Between the Angles (in):

Connector Type (required):

Connector Spacing Along the Member (in, 0 = no intermediate connectors):

Pick one angle of the pair as the Section Designation above (e.g. L4X3-1/2X3/8). The pair is built from that angle plus the gap.

7. Stem and Built-Up Options (Double Angle and Tee)

Stem Condition:

Cm about x-Axis (B1):

Cm about y-Axis (B1):

8. Tee Options

Tension Connection Type:

Y-Axis Bending:

9. Tension Connection (used when P_u is negative)

Tensile Strength Fu (psi):

Connection:

Bolt Diameter (in):

Fasteners in the Connection Line:

Fastener Spacing (in):

Weld Length (in):

Holes per Line:

Effective Net Area Ae (in², when connection = 3):

Shear Lag Factor U (when connection = 4):

Tension is checked only for single angles, double angles, and tees. A W, HSS, or pipe in tension is refused (compression and flexure only).

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