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GB/T 33943-2017 (GB/T33943-2017)

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GB/T 33943-2017: PDF in English (GBT 33943-2017)
GB/T 33943-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.10
J 13
High-strength structural anchor bolting assemblies
for steel structures
ISSUED ON: JULY 12, 2017
IMPLEMENTED ON: FEBRUARY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Type dimensions ... 5 
4 Technical conditions of structural anchor bolting assemblies ... 9 
5 Test methods ... 13 
6 Inspection rules ... 14 
7 Designation, marking, packaging, quality warranty ... 15 
High-strength structural anchor bolting assemblies for
steel structures
1 Scope
This Standard specifies high-strength structural anchor bolting assemblies
(hereinafter referred to as structural anchor bolting assemblies) for steel
structures made of carbon steel and alloy steel with screw thread specification
of M20~M64.
This Standard applies to high-strength structural anchor bolting assemblies for
steel structures for anchoring of building and structure foundation.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 90.2 Fasteners - Marking and packaging
GB/T 193 General purpose metric screw threads - General plan
GB/T 228.1 Metallic materials - Tensile testing - Part 1 : Method of test at
room temperature
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method
(scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 1237 Designation system for fasteners
GB/T 3098.1 Mechanical properties of fasteners - Bolts, screws and studs
GB/T 3098.2 Mechanical properties of fasteners - Nuts
GB/T 3103.1 Tolerances for fasteners - Bolts, screws, studs and nuts
GB/T 3103.3 Tolerances for fasteners - Plain washers
GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method
GB/T 5267.3 Fasteners - Hot dip galvanized coatings
GB/T 5276 Fasteners - Bolts, screws, studs and nuts - Symbols and
descriptions of dimensions
GB/T 5779.1 Fasteners - Surface discontinuities - Bolts, screws and studs
for general requirements
GB/T 5779.2 Fasteners - Surface discontinuities - Nuts
GB/T 9145 General purpose metric screw threads - Limits of sizes for the
screw threads of medium quality and preferable plan
GB/T 22028 Hot-dip galvanized screw threads - On internal screw threads
there is the clearance for accommodating the hot-dip galvanized coat
3 Type dimensions
3.1 Structural anchor bolting assemblies
The structural anchor bolting assemblies consist of anchor stud, nut, and
washer.
3.2 Anchor stud
3.2.1 Type of anchor stud
The types of anchor stud are Type A and Type B (see Figure 1). Type B is only
applicable to specification less than or equal to M39 and property level 8.8.
3.2.2 Dimensions of anchor stud
3.2.2.1 The dimensions of anchor stud are shown in Table 1. The symbols and
descriptions of dimensions shall conform to GB/T 5276.
Table 4 -- Combination of property level of anchor stud, nut, and washer
Products Anchor stud Nut Washer
Property level 10.9 10 35 HRC~45 HRC 8.8 8 35 HRC~45 HRC
4.2 Technical conditions of anchor stud
The technical conditions and reference standards for anchor stud are shown in
Table 5.
The mechanical properties of anchor stud specimen are shown in Table 6.
The tensile load of physical anchor stud is shown in Table 7.
Table 5 -- Technical conditions and reference standards for anchor stud
Material Steel
Screw
thread
Tolerances 6ga
Standards GB/T 193, GB/T 9145
Mechanical
properties
Property level 8.8b or 10.9b
Standard GB/T 3098.1
Tolerances Product grade C Standard GB/T 3103.1
Surface treatmentc
Not treated;
Technical requirements for hot-dip galvanized coating shall be
in accordance with GB/T 5267.3;
For other technical requirements or surface treatment, it shall
be agreed upon by the supplier and the purchaserd
Surface discontinuities GB/T 5779.1
a Hot-dip galvanized anchor studs shall be threaded and shall be used in conjunction with
nuts with increased tapping dimensions.
b The mechanical properties of the specimen are shown in Table 6. The physical tensile
load is shown in Table 7. The rest of the mechanical properties shall be in accordance
with GB/T 3098.1.
c When choosing a suitable surface treatment method (such as cleaning and coating), it is
necessary to consider the risk of hydrogen embrittlement of anchor studs with a property
level of 10.9; see the relevant coating standards.
d Without compromising mechanical properties or functional characteristics, according to
the agreement between the supplier and the purchaser, other coatings can be used. It is
not allowed to use cadmium or cadmium alloy coatings.
provisions of GB/T 3098.1.
5.4 Guaranteed load test of nut
The guaranteed load test of nut shall be in accordance with the provisions of
GB/T 3098.2.
5.5 Hardness test of nut and washer
The hardness test of nut and washer shall be in accordance with GB/T 230.1
or GB/T 4340.1. In case of dispute, the Vickers hardness HV30 shall be used
as the arbitration test.
5.6 Surface treatment test
5.6.1 Hot-dip galvanized coating
The test of hot-dip galvanized coating shall be in accordance with the provisions
of GB/T 5267.3.
5.6.2 Other anti-corrosion coatings
The test of other anti-corrosion coatings shall be subject to the agreement
between the supplier and the purchaser and shall be indicated in the contract.
5.7 Surface discontinuities
The test of surface discontinuities of anchor studs and nuts shall be in
accordance with GB/T 5779.1 or GB/T 5779.2.
The hook portion of Type B anchor stud shall be inspected using a 10x
magnifying glass.
6 Inspection rules
6.1 Exit-factory inspection shall be carried out in lots. The anchor studs of the
same material, furnace number, screw thread specification, length (When the
length of the anchor stud is >1000 mm, and the length difference is ≤100 mm,
it may be regarded as the same length), machining, heat treatment process,
and surface treatment process shall be regarded as the same lot. Nuts of the
same material, furnace number, screw thread specification, machining, heat
treatment process, and surface treatment process shall be regarded as the
same lot. Washers of the same material, furnace number, specification,
machining, heat treatment process, and surface treatment process shall be
regarded as the same lot. Structural assemblies consisting of the same lot of
anchor studs, nuts, and washers respectively shall be regarded as the same lot
The designation of hot-dip galvanized (tZn) Type A anchor stud for steel
structures with screw thread specification M42, nominal length L=1200 mm, and
property level 10.9 is:
Anchor stud GB/T 33943 M42×1200 tZn
The designation of hot-dip galvanized (tZn) Type B anchor stud for steel
structures with screw thread specification M39, nominal length L=1200 mm, and
property level 8.8 is:
Anchor stud GB/T 33943 M39×1200 B 8.8 tZn
7.2.3 Nut designation
When the large hexagon nut complying with the requirements of this Standard
is required for other connections, such as bolts, it is necessary to order
separately.
The designation of hot-dip galvanized (tZn) large hexagon nut with screw thread
specification M42 and property level 10 is:
Nut GB/T 33943 M42 tZn
7.2.4 Washer designation
When the plain washer complying with the requirements of this Standard is
required for other connections, such as bolts, or the matching quantity is
required to be increased, it is necessary to order separately.
The designation of hot-dip galvanized (tZn) washer with screw thread
specification 42 and hardness 329 HV30~436 HV30 (35 HRC~45 HRC) is:
Washer GB/T 33943 42 tZn
7.3 Product marking
For anchor stud and nut products, it shall, in accordance with the provisions of
GB/T 3098.1 or GB/T 3098.2, make the marks for property level and fastener
manufacturer identification.
7.4 Packaging and packaging marking
7.4.1 Unless otherwise specified, the packaging method shall be determined by
the manufacturer.
7.4.2 When the hot-dip galvanized nut and the anchor stud are in the same
order, they shall be in the same package. The purchaser may determine the
......
 
(Above excerpt was released on 2019-06-18, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT33943-2017