
Chapter 3: Hardware Requirements
Bolt Torque Specifications
The torque specification table below will help the installer determine how tight a specific bolt must be. A
bolt that has been over tightened can be just as dangerous as one that hasn’t been tightened enough.
IMPORTANT:
Bolts should not be tightened in excess of the torque specifications as listed in the below
chart.
Bolt
Minimum Torque
Maximum Torque
Sealing Joints
(joints with seal-
ing washers)
Structural Joints
(joints without
sealing washers)
Sealing Joints
(joints with seal-
ing washers)
Structural Joints
(joints without any
sealing washers)
ft-lb
N-m
ft-lb
N-m
ft-lb
N-m
ft-lb
N-m
5/16"-18 JS Grade 8 with seal
20
27
—
—
25
34
—
—
3/8"-16 JS Grade 8 with seal
30
41
—
—
35
47
—
—
7/16"-14 JS Grade 8 with seal
50
68
—
—
60
81
—
—
3/8"-16 YDP Grade 8 flanged
—
—
40
54
—
—
45
61
7/16"-14 YDP Grade 8 flanged
—
—
65
88
—
—
72
97
1/2"-13 YDP Grade 8 flanged
—
—
100
135
—
—
110
149
Identifying Bolt Grades
Bolts are identified by grade (or hardness). The grade can be identified by the markings on the head of
the bolt. These markings will be in the form of slash marks and patterns. Use the following as a guide to
determine the correct bolt grade.
CAUTION
Under no condition shall any other bolts be substituted for those supplied by GSI.
Grade 2 Bolts
Grade 2 bolts are designated with a plain head and are not used in GSI grain bins.
Grade 5 Bolts
Grade 5 bolts are designated by three slash marks on the head. All 5/16" diameter bolts
are to be grade 5 or higher.
Grade 8 Bolts
Grade 8 bolts are designated by six slash marks evenly spaced out around the head of the
bolt. All 3/8", 7/16" and 1/2" diameter bolts are to be grade 8 or grade 8.2.
Grade 8.2 Bolts
Grade 8.2 bolts are designated by six slash marks on the head in a sunrise pattern. All
3/8", 7/16" and 1/2" inch diameter bolts are to be grade 8 or grade 8.2.
NOTE:
Refer to 4.00" tank bolting requirements for complete bolt usage.
26
PNEG-5490D-2X
90' Diameter EVO-50 Beam 2X Bin
Содержание EVO-50
Страница 6: ...NOTES 6 PNEG 5490D 2X 90 Diameter EVO 50 Beam 2X Bin ...
Страница 34: ...NOTES 34 PNEG 5490D 2X 90 Diameter EVO 50 Beam 2X Bin ...
Страница 130: ...NOTES 130 PNEG 5490D 2X 90 Diameter EVO 50 Beam 2X Bin ...
Страница 188: ...NOTES 188 PNEG 5490D 2X 90 Diameter EVO 50 Beam 2X Bin ...
Страница 220: ...NOTES 220 PNEG 5490D 2X 90 Diameter EVO 50 Beam 2X Bin ...