CE470 Lab 8

Column splices

Live load reduction

Tributary and Influence Area

ASCE 7-10

Lab 8 – Column Design

Column Splices

Forney Hall Addition (Chemical Engineering)

Column Splices

Splices every 2 stories; typically

located a few feet

above the floor

Column Splices

Forney Hall Addition (Chemical Engineering)

Hole in web for lifting column into place Splices may also have web splice plates

Tributary Area, AT

Interior Column Tributary Area, AT

Interior Column Influence Area, AI

AI = AT*KLL

AI = AT*4

Interior Beam Tributary Area, AT

Interior Beam Influence Area, AI

AI = AT*KLL

AI = AT*2

ASCE 7-10 Live Load Reduction

ASCE 7-10 Live Load Reduction

Interior Column, Beam KLL Factor

From ASCE7-10 Commentary

Corner Column KLL Factor From ASCE7-10 Commentary

ASCE 7-10 Live Load Reduction

Note: see Section 4.8 for reduction in roof live loads

Lab #8 Column B-2

Lab #8 Column Design

Lab #8 Column Design

0.5Lo limit only for design of column section immediately below penthouse

Lab #7 Column Design

Try for the lightest W-shapes; note that it is not necessary that BOTH Ag and lower r value satisfy required values based on KL/r assumption.