# V. AISC ASD - Column Compression Capacity 3

Determine the axial compression capacity of a W12X40 column.

## Reference

AISC Allowable Stress Design, 9th Edition, tables on page 3-28.

## Problem

 Fy =36 ksi

 KyLy = KzLz = 16ft

## Comparison

The reported STAAD.Pro value is obtained by multiplying FA times AX from the STAAD.Pro output = 12.97(11.70) = 151.7.

Table 1. Comparison of results
Axial capacity (kips) 154 151.7 1.5%

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

STAAD SPACE AISC VERIFICATION PROBLEM FOR AXIAL COMPRESSION CAPACITY.
START JOB INFORMATION
ENGINEER DATE 22-Sep-18
END JOB INFORMATION
* PAGE 3-28 OF 9TH ED. AISC-ASD. W12X40, 16 FT LONG.
* FA SHOULD BE APPROXIMATELY 154/11.80 = 13.05 KSI
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 0 16 0;
MEMBER INCIDENCES
1 1 2;
MEMBER PROPERTY AMERICAN
1 TABLE ST W12X40
UNIT INCHES KIP
DEFINE MATERIAL START
ISOTROPIC STEEL_50_KSI
E 29000
POISSON 0.3
DENSITY 0.000283
ALPHA 6.5e-06
DAMP 0.03
TYPE STEEL
STRENGTH FY 50 FU 62 RY 1.5 RT 1.2
END DEFINE MATERIAL
UNIT FEET KIP
CONSTANTS
MATERIAL STEEL_50_KSI ALL
SUPPORTS
1 FIXED
2 FY -150
PERFORM ANALYSIS
UNIT INCHES KIP
PARAMETER 1
CODE AISC
FYLD 36 ALL
TRACK 2 ALL
CHECK CODE ALL
FINISH


      AISC VERIFICATION PROBLEM FOR AXIAL COMPRESSION CAPACITY -- PAGE NO.    3
STAAD.PRO CODE CHECKING - (AISC 9TH EDITION)   v1.0
********************************************
|--------------------------------------------------------------------------|
|                                                    Y        PROPERTIES   |
|*************                                       |        IN INCH UNIT |
|            *  |=============================|   ===|===     ------------ |
|MEMBER   1  *  |  AISC SECTIONS              |      |        AX =  11.70  |
|            *  | ST  W12X40                  |      |   --Z  AY =   3.25  |
|DESIGN CODE *  |                             |      |        AZ =   5.51  |
| AISC-1989  *  ===============================   ===|===     SY =  11.01  |
|            *                                                SZ =  51.60  |
|            *  |&lt;---LENGTH (FT)=   16.00 --->|               RY =   1.94  |
|*************                                                RZ =   5.12  |
|                                                                          |
|                  0.0 (KIP-FEET)                                          |
|PARAMETER        |L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  STRESSES     |
|IN KIP  INCH     |L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  IN KIP  INCH |
|---------------  +L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  -------------|
| KL/R-Y=  98.90  |L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  FA  =  12.97 |
| KL/R-Z=  37.48  +L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  fa  =  12.82 |
| UNL   = 192.00  |L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  FCZ =  21.60 |
| CB    =   1.00  +L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  FTZ =  21.60 |
| CMY   =   0.85  |L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  FCY =  27.00 |
| CMZ   =   0.85  +L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  FTY =  27.00 |
| FYLD  =  36.00  |L0 L0  L0  L0  L0  L0  L0  L0  L0  L0  L0  fbz =   0.00 |
| NSF   =   1.00  +---+---+---+---+---+---+---+---+---+---|   fby =   0.00 |
| DFF   =   0.00   0.0                                        Fey =  15.27 |
| dff=      0.00               ABSOLUTE MZ ENVELOPE           Fez = 106.29 |
| (KL/R)max =  98.90              (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     150.0         0.0        0.0         0.0         0.0      |
|   LOCATION       0.0         0.0        0.0         0.0         0.0      |
|                                                                          |
|**************************************************************************|
|*                                                                        *|
|*                         DESIGN SUMMARY  (KIP-FEET)                     *|
|*                         --------------                                 *|
|*                                                                        *|