Steel Joists and joist Girders - New Millennium Building Systems

Introduction
General Joist
Information
Economical
Design Guide
Top Chord
Ext., K-Series
KCS Joists Joist Substitutes
& Outriggers
Joist LRFD
Load Tables
Joist ASD
Load Tables
Load/Load
Weight Tables
Joist Girder
Weight Tables
SJI Standard
Specifications
SJI Code of
Stand. Practice
Fire Resistance
Ratings
OSHA Safety
Standards
SJI Bridging Tables
TABLE 5.4-1
NUMBER OF ROWS OF TOP CHORD BRIDGING - K-Series**
Refer to K-Series Load Table and Specification Section 6 for required bolted diagonal bridging.
Distances are Joist Span lengths in feet - See “Definition of Span” on page 27.
Section # * Joist Depth One Row Two Rows Three Rows Four Rows
1 All Up thru 17 Over 17 thru 26 Over 26 thru 28
2 All Up thru 21 Over 21 thru 30 Over 30 thru 32
3 All Up thru 18 Over 18 thru 26 Over 26 thru 40
4 All Up thru 20 Over 20 thru 30 Over 30 thru 41 Over 41 thru 48
5
12K thru 24K
26K
Up thru 20
Up thru 28
Over 20 thru 30
Over 28 thru 41
Over 30 thru 42
Over 41 thru 52
Over 42 thru 48
6
14K thru 24K
26K and 28K
Up thru 20
Up thru 28
Over 20 thru 31
Over 28 thru 41
Over 31 thru 42
Over 41 thru 54
Over 42 thru 48
Over 54 thru 56
7
16K thru 24K
26K thru 30K
Up thru 23
Up thru 29
Over 23 thru 34
Over 29 thru 44
Over 34 thru 48
Over 44 thru 60
8
24K
26K thru 30K
Up thru 25
Up thru 29
Over 25 thru 39
Over 29 thru 44
Over 39 thru 48
Over 44 thru 60
9
16K thru 24K
26K thru 30K
Up thru 22
Up thru 29
Over 22 thru 34
Over 29 thru 44
Over 34 thru 48
Over 44 thru 60
10
18K thru 24K
26K thru 30K
Up thru 22
Up thru 29
Over 22 thru 38
Over 29 thru 48
Over 38 thru 48
Over 48 thru 60
11
22K
30K
Up thru 24
Up thru 34
Over 24 thru 39
Over 34 thru 49
Over 39 thru 44
Over 49 thru 60
12
24K
26K thru 30K
Up thru 25
Up thru 29
Over 25 thru 43
Over 29 thru 47
Over 43 thru 48
Over 47 thru 60
Joist Depth
TABLE 2.7-3
LH & DLH - SERIES JOISTS
HORIZONTAL PLUS DIAGONAL BRIDGING REQUIREMENTS
Minimum Joist Space for
Diagonal Only Bridging
(0.70 x Joist Depth)
Discover the easiest way to specify steel joists and Joist Girders:
8 www.newmill.com/digital-tools
Horizontal and Diagonal Bridging
Minimum Angle Size Required*
52 3’ - 0” L 1 x 1 x 7/64
56 3’ - 3” L 1 x 1 x 7/64
60 3’ - 6” L 1 x 1 x 7/64
64 3’ - 8” L 1 1/4 x 1 1/4 x 7/64
68 3’ - 11” L 1 1/4 x 1 1/4 x 7/64
72 4’ - 2” L 1 1/4 x 1 1/4 x 7/64
80 4’ - 8” L 1 1/4 x 1 1/4 x 7/64
88 5’ - 1” L 1 1/2 x 1 1/2 x 7/64
96 5’ - 7” L 1 1/2 x 1 1/2 x 7/64
104 6’ - 0” L 1 3/4 x 1 3/4 x 7/64
112 6’ - 6” L 1 3/4 x 1 3/4 x 7/64
120 7’ - 0” L 2 x 2 x 1/8
* When joist span is greater than 60’-0” and joist space is less than space shown (0.70 x Joist Depth), bolted horizontal bridging
is required in addition to bolted diagonal bridging.
TABLE 2.7-4
BOLT SIZES WHICH MEET BOLTED BRIDGING
CONNECTION REQUIREMENTS
Joist Series Section Number* Bolt Diameter and Grade
K ALL 3/8” A307
LH/DLH 2 thru 12 3/8” A307
LH/DLH 13 thru 17 1/2” A307
DLH 18 thru 20 5/8” A307
DLH 21 and 22 5/8” A325
DLH 23 thru 25 3/4” A325
* Refer to last digit(s) of standard SJI joist designation.
Note: Washers shall be used with slotted or over-sized holes. Bolts shall be tightened to a minimum snug tight condition.
* Refer to last digit(s) of standard SJI joist designation.
** See Section 5.11 for additional bridging required
for uplift design.
OSHA TABLES A and B
ERECTION BRIDGING
Joist Span Joist Span
12K1 23’ - 0” 30K9 45’ - 0”
14K1 27’ - 0” 30K10 50’ - 0”
16K2 29’ - 0” 30K11 52’ - 0”
16K3 30’ - 0” 30K12 54’ - 0”
16K4 32’ - 0” 18KCS2 35’ - 0”
16K5 32’ - 0” 20KCS2 36’ - 0”
18K3 31’ - 0” 20KCS3 39’ - 0”
18K4 32’ - 0” 22KCS2 36’ - 0”
18K5 33 - 0” 22KCS3 40’ - 0”
18K6 35’ - 0” 24KCS2 39’ - 0”
20K3 32’ - 0” 24KCS3 44’ - 0”
20K4 34’ - 0” 26KCS2 39’ - 0”
20K5 34’ - 0” 26KCS3 44’ - 0”
20K6 36’ - 0” 28KCS2 40’ - 0”
20K7 39’ - 0” 28KCS3 45’ - 0”
20K9 39’ - 0” 28KCS4 53’ - 0”
22K4 34’ - 0” 28KCS5 53’ - 0”
22K5 35’ - 0” 30KCS3 45’ - 0”
22K6 36’ - 0” 30KCS4 54’ - 0”
22K7 40’ - 0” 30KCS5 54’ - 0”
22K9 40’ - 0” 18LH02 33’ - 0”
24K4 36’ - 0” 20LH02 33’ - 0”
24K5 38’ - 0” 20LH03 38’ - 0”
24K6 39’ - 0” 24LH03 35’ - 0”
24K7 43’ - 0” 24LH04 39’ - 0”
24K8 43’ - 0” 24LH05 40’ - 0”
24K9 44’ - 0” 24LH06 45’ - 0”
26K5 38’ - 0” 28LH05 42’ - 0”
26K6 39’ - 0” 28LH06 46’ - 0”
26K7 43’ - 0” 28LH07 54’ - 0”
26K8 44’ - 0” 28LH08 54’ - 0”
26K9 44’ - 0” 32LH06 47’ - 0”
26K10 49’ - 0” 32LH07 47’ - 0”
28K6 40’ - 0” 32LH08 55’ - 0”
28K7 43’ - 0” 36LH07 47’ - 0”
28K8 44’ - 0” 36LH08 47’ - 0”
28K9 45’ - 0” 36LH09 57’ - 0”
28K10 49’ - 0” 40LH08 47’ - 0”
28K12 53’ - 0” 40LH09 47’ - 0”
30K7 44’ - 0” 44LH09 52’ - 0”
30K8 45’ - 0”
Joists not listed above do not require OSHA
erection bridging through spans per SJI
Specifications 5.2 and 104.2 or 60’-0”.