R0162831 tính toán hệ thống cơ khí

15-2527
NFto
Add
Level D limitsPage
for supports
Record 16-2831 Correction
15-2527
1 of 2
(formerly
This page15-2305)
info only

MarchNov.
31, 2016
9, 2016

%71) &4:'---2*

2*

2* 2SQIRGPEXYVI 8LI W]QFSPW YWIH MR XLMW
TEVEKVETL EVI HIJMRIH EW JSPPS[W

(IWMKR SJ ;IPHIH .SMRXW

8LI X]TIW SJ [IPHIH NSMRXW WLEPP FI EW WXMTYPEXIH MR
2* JSV 'PEWW  ERH 1' WYTTSVXW I\GITX XLEX JSV
KVSSZI [IPHIH 8 NSMRXW KVSSZI [IPHIH GSVRIV NSMRXW
ERH JMPPIX [IPHIH 8 NSMRXW EW PMWXIH MR 2*
E


ERH 2*
E


 XLI [IPHW QE] FI MRXIVQMXXIRX MR
WXIEH SJ GSRXMRYSYW -RXIVQMXXIRX JMPPIX [IPHW WLEPP QIIX
ST
XLI VIUYMVIQIRXW SJ 2*
H


 8LI EPPS[EFPI
WXVIWW PMQMXW WLEPP FI EW WXMTYPEXIH MR 2*

/P ! PSEH VEXMRK GSIJJMGMIRX JSV WYT TSVX MR
GSQTVIWWMSR
7 ! EPPS[EFPI WXVIWW ZEPYI EX XLI (IWMKR 8IQTIVE
XYVI
2*
JVSQ XLI ETTPMGEFPI XEFPIW
SJ 7IGXMSR -- 4EVX ( 7YFTEVX  OWM
14E
7 ! WTIGMJMIH QMRMQYQ XIRWMPI WXVIRKXL SJ XLI QE
XIVMEP YWIH MR XLI WYTTSVX EW KMZIR MR XLI ETTPMG
EFPI XEFPIW SJ 7IGXMSR -- 4EVX ( 7YFTEVX  OWM

14E
7
! EGXYEP XIRWMPI WXVIRKXL SJ XLI QEXIVMEP YWIH MR

XLI TEVX SV WYTTSVX [LMGL LEH VIEGLIH YPXM
QEXI GETEGMX] HYVMRK XLI XIWX OWM
14E
7
! EGXYEP ]MIPH WXVIRKXL SJ XLI QEXIVMEP YWIH MR XLI
TEVX SV WYTTSVX [LMGL ]MIPHIH HYVMRK XLI XIWX
OWM
14E
80 ! WYTTSVX XIWX PSEH EX [LMGL E WYFWXERXMEP MR
GVIEWI MR PSEH HMWTPEGIQIRX VIWYPXW MR ^IVS SV
RIKEXMZI MRGVIEWI MR EGXYEP WYTTSVX PSEH
80 ! WYTTSVX XIWX PSEH EX SV FIPS[ ]MIPH

SY = specified minimum yield strength of the
material
used)<4)6-1)28%0
in the support 786)77
as given%2%0=7-7
in the
2*
applicable
tables
of
Section
II,
Part
D,
7YTTSVXW QE] FI HIWMKRIH F] I\TIVMQIRXEP WXVIWW ERE
Subpart
ksi (MPa)[MXL 7IGXMSR --- %TTIRHMGIW 1ERHE

P]WMW MR1,EGGSVHERGI
XSV] %TTIRHM\ --

2*

()7-+2 &= 03%( 6%8-2+

Su = see2*
NF-3313.1
4VSGIHYVI JSV 0SEH 6EXMRK
Sy = see NF-3313.1
8LI TVSGIHYVI JSV PSEH VEXMRK WLEPP GSRWMWX SJ MQTSWMRK
E XSXEP PSEH SR SRI SV QSVI HYTPMGEXI JYPP WM^I WEQTPIW SJ E
WYTTSVX IUYEP XS SV PIWW XLER XLI PSEH YRHIV [LMGL XLI
WYTTSVX JEMPW XS TIVJSVQ MXW VIUYMVIH JYRGXMSR *YPP WM^I
WEQTPIW GSQTSWIH SJ ZEVMSYW TEVXW QE] LEZI IEGL TEVX
SV E RYQFIV SJ TEVXW PSEH VEXIH TVSZMHIH XLEX EPP TEVXW
MR XLI PSEH TEXL EVI IMXLIV PSEH VEXIH SV SXLIV[MWI UYEPM
JMIH TIV 2* SV F] I\TIVMQIRXEP WXVIWW EREP]WMW
;LIR TEVXW EVI GSRRIGXIH F] FSPXMRK SV [IPHMRK XLI GSR
RIGXMSR WLEPP FI IMXLIV PSEH VEXIH SV UYEPMJMIH TIV
2* SV 2* 7LSYPH QSVI XLER SRI TEVX FI PSEH
VEXIH MR E WMRKPI PSEH XIWX XLIR XLI PSEH VEXMRK IUYEXMSRW
SJ 2* WLEPP FI IZEPYEXIH JSV IEGL TEVX YWMRK XLI
TEVXvW 7
ERH 7
ZEPYIW 8LI TEVX LEZMRK XLI PS[IWX
PSEH VEXMRK WLEPP IWXEFPMWL XLI PSEH VEXMRK JSV XLI GSQFMRE
XMSR SJ TEVXW % WMRKPI XIWX WEQTPI MW TIVQMXXIH FYX MR XLEX
GEWI XLI PSEH VEXMRKW WLEPP FI VIHYGIH F]  3XLIV[MWI

XIWXW WLEPP FI VYR SR E WXEXMWXMGEPP] WMKRMJMGERX RYQFIV SJ
WEQTPIW 8LI TIVQMWWMFPI X]TIW SJ [IPHIH NSMRXW WLEPP FI
EW TIVQMXXIH JSV XLI WTIGMJMG GPEWW SJ GSRWXVYGXMSR MR
2* 2* ERH 2* 8LI JYPP WM^I WEQTPI
WLEPP FI JEFVMGEXIH JSV XIWXMRK YWMRK [IPHW RSX I\GIIHMRK
[IPH WM^IW WXMTYPEXIH MR XLI (IWMKR (VE[MRKW &SPXIH
NSMRXW MR XLI XIWX WEQTPI WLEPP FI QEHI YT YWMRK XLI PS[IWX
WXVIRKXL FSPX QEXIVMEP ERH QMRMQYQ IHKI HMWXERGI EP
PS[IH F] XLI WTIGMJMGEXMSR

2* 4PEXI ERH 7LIPP8]TI 7YTTSVXW 8LI PSEH
VEXMRKW JSV 4PEXI ERH 7LIPP 8]TI 7YTTSVXW JSV XLI 7IVZMGI
0SEHMRKW WLEPP FI HIXIVQMRIH F] XLI JSPPS[MRK IUYEXMSRW
(IWMKR ERH 0IZIP % 0MQMXW
PS[IV SJ XLI X[S ZEPYIW
ÔÂ

ÔÂ

8IWX ERH 0IZIP & 0MQMXW
PS[IV SJ XLI X[S ZEPYIW
ÔÂ

ÔÂ

0IZIP ' 0MQMXW
PS[IV SJ XLI X[S ZEPYIW

Level D Limits (lower of the three values)
2*

0SEH 6EXMRKW MR 6IPEXMSR
XS (IWMKR
load rating
(7)
(yield) = TLy x 2.0 S/Sy(act)
7IVZMGI ERH 8IWX 0SEHMRKW
load rating(ult.) = TLu x 0.7 Su /Su(act) (8)
8LI PSEH
VEXMRK JSV (IWMKR 0SEHMRKW
WLEPP FI HIXIV
load rating
(9)
(ult.) = TLu x 0.7

ÔÂ

QMRIH MR EGGSVHERGI [MXL XLI VIUYMVIQIRXW JSV 7IVZMGI
0IZIP % PMQMXW 8LI PSEH VEXMRKW JSV 7IVZMGI 0SEHMRKW JSV
Note to Editors:
update
references
[LMGL 0IZIP
% &all
SVcross
' 0MQMXW
LEZI FIIR HIWMKREXIH WLEPP
FI HIXIVQMRIH F] QIERW SJ XLI IUYEXMSRW MR XLI JSPPS[MRK
WYFTEVEKVETLW *SV 0IZIP ( 0MQMXW WII 7IGXMSR --- %TTIR
HMGIW 2SRQERHEXSV] %TTIRHM\ * 8LI PSEH VEXMRK JSV 8IWX
0SEHMRKW WLEPP FI HIXIVQMRIH MR EGGSVHERGI [MXL XLI

D VI
UYMVIQIRXW JSV 7IVZMGI 0IZIP & PMQMXW

ÔÂ

2* 7YTTSVXW 0SEHIH MR 'SQTVIWWMSR 8LI
PSEH VEXMRK JSV WYTTSVXW PSEHIH MR GSQTVIWWMSR WLEPP FI
HIXIVQMRIH JSV 7IVZMGI 0IZIPW % XLVSYKL ' F] XLI


'ST]VMKLXF]XLI%QIVMGER7SGMIX]SJ1IGLERMGEP)RKMRIIVW
2SVITVSHYGXMSRQE]FIQEHISJXLMWQEXIVMEP[MXLSYX[VMXXIRGSRWIRXSJ%71)

Page 10 of 25


15-2527
Add Level D limits
for2supports
Record
16-2831 CorrectionNF
to 15-2527
Page
of 2
(formerly
15-2305)
Change "ultimate" to "tensile" as shown in bubble

March
31,9,

2016
Nov.
2016

%71) &4:'---2*

RYQFIV SJ WEQTPIW 8LI TIVQMWWMFPI X]TIW SJ [IPHIH
NSMRXW WLEPP FI EW TIVQMXXIH JSV XLI WTIGMJMG GPEWW SJ GSR
WXVYGXMSR MR 2* 2* 2* ERH
2* 8LI VIUYMVIQIRXW SJ 2*
F
JSV WM^I SJ JMP
PIX ERH TEVXMEP TIRIXVEXMSR [IPHW HS RSX ETTP] TVSZMHIH
XLI JYPP WM^I WEQTPI MW JEFVMGEXIH JSV XIWXMRK YWMRK XLI
QMRMQYQ [IPH WXMTYPEXIH MR XLI (IWMKR (VE[MRKW &SPXIH
NSMRXW MR XLI XIWX WEQTPI WLEPP FI QEHI YT YWMRK XLI PS[IWX
WXVIRKXL FSPX QEXIVMEP ERH QMRMQYQ IHKI HMWXERGI EP
PS[IH F] XLI WTIGMJMGEXMSR



7XMJJIRIVW 7XMJJIRIVW WLEPP FI YWIH EW VIUYMVIH XS
TVIWIVZI XLI JPERKI GSRXMRYMX] SJ MRXIVVYTXIH QIQFIVW EX
XLIMV NYRGXMSR [MXL SXLIV QIQFIVW MR E GSRXMRYSYW JVEQI
7YGL WXMJJIRIVW WLEPP FI TPEGIH MR TEMVW SR STTSWMXI WMHIW
SJ XLI [IF SJ XLI QIQFIV [LMGL I\XIRHW GSRXMRYSYWP]
XLVSYKL XLI NSMRX


7XVIWW MR &SPXW ERH ;IPHW ,MKL WXVIRKXL FSPXW

7% FSPXW ERH [IPHW WLEPP FI TVSTSVXMSRIH XS VIWMWX
XLI JSVGIW TVSHYGIH EX JEGXSVIH PSEH YWMRK WXVIWWIW IUYEP
Level
A through D
XS  XMQIW XLSWI KMZIR
MR 2*
E
JSV FSPXW ERH
8EFPI 2*
E
 JSV [IPHW -R KIRIVEP KVSSZI [IPHW
EVI TVIJIVEFPI XS JMPPIX [IPHW FYX XLIMV YWI MW RSX
QERHEXSV]


.SMRXW ;MXL 4EMRXIH 'SRXEGX 7YVJEGIW ,MKL
WXVIRKXL FSPXW QE] FI YWIH MR NSMRXW LEZMRK TEMRXIH GSR
XEGX WYVJEGIW [LIR XLIWI NSMRXW EVI SJ WYGL WM^I XLEX XLI
tensile
WPMT VIUYMVIH
XS TVSHYGI FIEVMRK [SYPH RSX MRXIVJIVI [MXL
XLI JSVQEXMSR EX JEGXSVIH PSEHMRK SJ XLI TPEWXMG LMRKIW EW
WYQIH MR XLI HIWMKR

2*

8LI PSEH VEXMRK JSV (IWMKR 0SEHMRKW WLEPP FI HIXIV
QMRIH MR EGGSVHERGI [MXL XLI VIUYMVIQIRXW JSV 7IVZMGI
0IZIP % PMQMXW 8LI PSEH VEXMRKW JSV 7IVZMGI 0SEHMRKW JSV
[LMGL 0IZIP % & SV ' 0MQMXW LEZI FIIR HIWMKREXIH WLEPP

FI HIXIVQMRIH F] QIERW SJ XLI IUYEXMSRW MR XLI JSPPS[MRK
WYFTEVEKVETLW *SV 0IZIP ( 0MQMXW WII 7IGXMSR --- %TTIR
HMGIW 2SRQERHEXSV] %TTIRHM\ * 8LI PSEH VEXMRK JSV 8IWX
0SEHMRKW WLEPP FI HIXIVQMRIH MR EGGSVHERGI [MXL XLI VI
UYMVIQIRXW JSV 7IVZMGI 0IZIP & PMQMXW

2*
()7-+2
&= %2%0=7-7
'0%77 
ST = specified
minimum
ultimate
strength*36
of the
%2( 1'
material used in the support as given in the
8LItables
HIWMKR F]
'PEWW
 ERH
applicable
ofEREP]WMW
SectionSJII,
Part
D, 1' WYTTSVXW WLEPP
FI MR EGGSVHERGI [MXL 2* ERH 2*
Subpart 1, ksi (MPa)
2*

2* 2SQIRGPEXYVI 8LI W]QFSPW YWIH MR XLMW
TEVEKVETL EVI HIJMRIH EW JSPPS[W

()7-+2 &= %2%0=7-7 *36 '0%77 

*

! EPPS[EFPI ZEPYI JSV XLI X]TI SJ WXVIWW MR
2* OWM
14E
/ P ! P S EH V EX M R K G SI JJ M G M IR X JS V W YT T S V X W M R
GSQTVIWWMSR
7
! EGXYEP XIRWMPI WXVIRKXL SJ XLI QEXIVMEP YWIH MR
XLI TEVX SV WYTTSVX [LMGL LEH VIEGLIH YPXM
QEXI GETEGMX] HYVMRK XLI XIWX OWM
14E
7
! EGXYEP ]MIPH WXVIRKXL SJ XLI QEXIVMEP YWIH MR XLI
TEVX SV WYTTSVX [LMGL ]MIPHIH HYVMRK XLI XIWX
OWM
14E
80 ! WYTTSVX XIWX PSEH EX [LMGL E WYFWXERXMEP MR
GVIEWI MR PSEH HMWTPEGIQIRX VIWYPXW MR ^IVS SV
RIKEXMZI MRGVIEWI MR EGXYEP WYTTSVX PSEH
80 ! WYTTSVX XIWX PSEH EX SV FIPS[ ]MIPH

HIWMKR F] EREP]WMW SJ 'PEWW  WYTTSVXW WLEPP FI MR
SY = specified8LI
minimum

yield strength of the
EGGSVHERGI [MXL 2* ERH 2*

material used in the support as given in the
ÔÂ 2*
786)77
applicable
tables)<4)6-1)28%0
of Section II, Part
D, %2%0=7-7
7YTTSVXW
SJ
EPP
X]TIW
QE]
FI
HIWMKRIH
F] I\TIVMQIRXEP
Subpart 1, ksi (MPa)

WXVIWW EREP]WMW MR EGGSVHERGI [MXL 7IGXMSR --- %TTIRHMGIW
1ERHEXSV] %TTIRHM\ -- ;LIR I\TIVMQIRXEP WXVIWW EREP]
WMW MW YWIH XLI ETTVSTVMEXI WXVIWW EGGITXERGI GVMXIVME ERH
SXLIV PMQMXW SJ 2* WLEPP ETTP]
= see NF-3313.1

Su
Sy = see NF-3313.1
2* ()7-+2 &= 03%( 6%8-2+
2*

0SEH 6EXMRKW MR 6IPEXMSR XS (IWMKR
7IVZMGI ERH 8IWX 0SEHMRKW

4VSGIHYVI JSV 0SEH 6EXMRK

8LI TVSGIHYVI JSV PSEH VEXMRK WLEPP GSRWMWX SJ MQTSWMRK
E XSXEP PSEH SR SRI SV QSVI HYTPMGEXI JYPP WM^I WEQTPIW JSV
E WYTTSVX IUYEP XS SV PIWW XLER XLI PSEH YRHIV [LMGL XLI
WYTTSVX JEMPW XS TIVJSVQ MXW VIUYMVIH JYRGXMSR *YPP WM^I
WEQTPIW GSQTSWIH SJ ZEVMSYW TEVXW QE] LEZI IEGL TEVX
SV E RYQFIV SJ TEVXW PSEH VEXIH TVSZMHIH XLEX EPP TEVXW
MR XLI PSEH TEXL EVI IMXLIV PSEH VEXIH SV SXLIV[MWI UYEPM
JMIH TIV 2* SV F] I\TIVMQIRXEP WXVIWW EREP]WMW
;LIR TEVXW EVI GSRRIGXIH F] FSPXMRK SV [IPHMRK XLI GSR
RIGXMSR WLEPP FI IMXLIV PSEH VEXIH SV UYEPMJMIH TIV
2* SV 2* 7LSYPH QSVI XLER SRI TEVX FI PSEH
VEXIH MR E WMRKPI PSEH XIWX XLIR XLI PSEH VEXMRK IUYEXMSRW
SJ 2* WLEPP FI IZEPYEXIH JSV IEGL TEVX YWMRK XLI
TEVXvW 7
ERH 7
ZEPYIW 8LI TEVX LEZMRK XLI PS[
IWX PSEH VEXMRK WLEPP IWXEFPMWL XLI PSEH VEXMRK JSV XLI GSQ
FMREXMSR SJ TEVXW % WMRKPI XIWX WEQTPI MW TIVQMXXIH FYX MR
XLEX GEWI XLI PSEH VEXMRKW WLEPP FI HIGVIEWIH F] 
3XLIV[MWI XIWXW WLEPP FI VYR SR E WXEXMWXMGEPP] WMKRMJMGERX

2* 0MRIEV8]TI 7YTTSVXW 8LI PSEH VEXMRKW
JSV 0MRIEV 8]TI 7YTTSVXW JSV XLI 7IVZMGI 0SEHMRKW WLEPP
FI HIXIVQMRIH F] XLI JSPPS[MRK IUYEXMSRW

(IWMKR ERH 0IZIP % 0MQMXW