Example F.6 HSS flexural member with compact flanges

The results are generated with SDC Verifier 3.7.1 and calculated with FEMAP v11.0.0. The example was calculated in American unit system.

Note: Maximum deflection and beam selection has not implemented yet in SDC Verifier.

Task: Select a square ASTM A500 Grade B HSS beam to span 7.5 ft. The loads are a uniform dead load of 0.145 kip/ft and a uniform live load of 0.435 kip/ft. Limit the live load deflection to L/240. The beam is continuously braced.

F6 1

Solution:

From AISC Manual Table 2-4, the material properties are as follows:

ASTM A500 Grade B

Fy = 46 ksi

Fu = 58 ksi

From Chapter 2 of ASCE/SEI 7, the required flexural strength is:

F6 2

Minimum Required Moment of inertia

Determine the minimum required I as follows.

F6 3

Beam Selection

Select an HSS with a minimum lx of 2.85 in4.,using AISC Manual Table 1-12, and having adequate available strength, using AISC Manual Table 3-13.

Try an HSS 3½×?.

From AISC Manual Table 1-12, lx = 2.90 in4 > 2.85 in4o.k.

From AISC Manual Table 3-13, the available flexural strength is:

F6 4

Units which were used in calculation:

1 kip = 1000 lb

1 ft = 12 in

1 ksi = 1000 psi (lb/in^2)

Example from AISC Design Examples

Material summaryF6 5

F6 6

Properties Summary

F6 7

F6 8

Geometry Property Value
Height 3.50
Width 3.50
h 3.50
b 3.50
d 0.12

FEM Loads and Constraint

1..Loads

F6 9

F6 10

Constraint

F6 11

Check 1..ANSI / AISC LRFD 360-10

Individual Load ‘1..Loads.Constraint’

F6 12

From Chapter 2 of ASCE/SEI 7, the required flexural strength is

F6 13

Download SDC Verifier project file, model and report of  Example F.6

Subscribe to Newsletter

Get SDC Verifier insights, news, and updates, straight in your inbox