# V. AISC ASD - Wide Flange Beam Load Capacity 3

Determine the bending (transverse load carrying) capacity of a W16x45 shape.

## Reference

AISC Allowable Stress Design, 9th Edition, tables, page 2-80.

## Problem

 Fy =36 ksi

 L =20ft

 Luc = 5ft (Unbraced length of compression flange)

## Comparison

The reported STAAD.Pro value is obtained by dividing the applied load (using the table capacity) by the reported STAAD.Pro critical ratio =58/1.008 = 57.54.

Table 1. Comparison of results
Total allowable uniform load (kips) 58 57.54 <1%

The file C:\Users\Public\Public Documents\STAAD.Pro CONNECT Edition\Samples\ Verification Models\09 Steel Design\US\AISC\ASD 9th Edition\AISC ASD - Wide Flange Beam Load Capacity 3.STD is typically installed with the program.

``````STAAD SPACE AISC VERIFICATION PROBLEM FOR BENDING CAPACITY. PAGE 2-34 OF
START JOB INFORMATION
ENGINEER DATE 22-Sep-18
END JOB INFORMATION
* 9TH ED. AISC-ASD EXAMPLE 4.
* RATIO SHOULD BE APPROXIMATELY 1.0
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 20 0 0;
MEMBER INCIDENCES
1 1 2;
MEMBER PROPERTY AMERICAN
1 TABLE ST W16X45
UNIT INCHES KIP
DEFINE MATERIAL START
ISOTROPIC MATERIAL1
E 29000
POISSON 0.3
END DEFINE MATERIAL
UNIT FEET KIP
CONSTANTS
MATERIAL MATERIAL1 ALL
SUPPORTS
1 PINNED
2 FIXED BUT MZ
1 UNI GY -2.9
PERFORM ANALYSIS
UNIT INCHES KIP
PARAMETER 1
CODE AISC
MAIN 1 ALL
BEAM 1 ALL
FYLD 36 ALL
TRACK 2 ALL
UNL 60 ALL
CHECK CODE ALL
FINISH
``````

```                       STAAD.PRO CODE CHECKING - (AISC 9TH EDITION)   v1.0
********************************************
|--------------------------------------------------------------------------|
|                                                    Y        PROPERTIES   |
|*************                                       |        IN INCH UNIT |
|            *  |=============================|   ===|===     ------------ |
|MEMBER   1  *  |  AISC SECTIONS              |      |        AX =  13.30  |
|            *  | ST  W16X45                  |      |   --Z  AY =   4.98  |
|DESIGN CODE *  |                             |      |        AZ =   5.31  |
| AISC-1989  *  ===============================   ===|===     SY =   9.32  |
|            *                                                SZ =  72.80  |
|            *  |&lt;---LENGTH (FT)=   20.00 --->|               RY =   1.57  |
|*************                                                RZ =   6.64  |
|                                                                          |
|                145.0 (KIP-FEET)                                          |
|PARAMETER        |               L1  L1  L1                  STRESSES     |
|IN KIP  INCH     |                                           IN KIP  INCH |
|---------------  +           L1              L1              -------------|
| KL/R-Y= 152.83  |                                           FA  =   6.39 |
| KL/R-Z=  36.16  +       L1                      L1          fa  =   0.00 |
| UNL   =  60.00  |                                           FCZ =  23.76 |
| CB    =   1.00  +   L1                              L1      FTZ =  23.76 |
| CMY   =   0.85  |                                           FCY =  27.00 |
| CMZ   =   0.85  +                                           FTY =  27.00 |
| FYLD  =  36.00  |L0                                     L0  fbz =  23.90 |
| NSF   =   1.00  +---+---+---+---+---+---+---+---+---+---|   fby =   0.00 |
| DFF   =   0.00  -8.1                                        Fey =   6.39 |
| dff=      0.00               ABSOLUTE MZ ENVELOPE           Fez = 114.23 |
| (KL/R)max = 152.83              (WITH LOAD NO.)             FV  =  14.40 |
|                                                             fv  =   0.00 |
|                                                                          |
|                      MAX FORCE/ MOMENT SUMMARY  (KIP-FEET)               |
|                      -------------------------                           |
|                                                                          |
|                AXIAL      SHEAR-Y    SHEAR-Z    MOMENT-Y    MOMENT-Z     |
|                                                                          |
|      VALUE       0.0        29.0        0.0         0.0       145.0      |
|   LOCATION       0.0         0.0        0.0         0.0        10.0      |
|                                                                          |
|**************************************************************************|
|*                                                                        *|
|*                         DESIGN SUMMARY  (KIP-FEET)                     *|
|*                         --------------                                 *|
|*                                                                        *|