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GB 5725: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 5725-2025 | English | 410 |
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Fall protection - Safety nets
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| GB 5725-2009 | English | 115 |
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Safety nets
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| GB 5725-1997 | English | 319 |
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Safety nets
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| GB 5725-1985 | English | RFQ |
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GB 5725-2025: Fall protection - Safety nets
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB5725-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.99
CCS C 73
Replacing GB 5725-2009
Fall protection - Safety nets
Issued on: AUGUST 29, 2025
Implemented on: SEPTEMBER 01, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Classification, protection level and marking... 8
5 Technical requirements... 10
6 Test methods... 14
7 Marking... 19
8 Information to be provided by the manufacturer... 19
Appendix A (Normative) Impact resistance test... 21
Appendix B (Normative) Penetration resistance test... 26
Appendix C (Normative) Weather resistance test... 31
Bibliography... 32
Fall protection - Safety nets
1 Scope
This document specifies the classification marking, technical requirements,
identification and information to be provided by the manufacturer for safety nets, and
describes the corresponding test methods.
This document is applicable to safety nets, in industries such as construction, water
conservancy, highways, electricity, shipbuilding, chemicals, mining, ports, and
amusement parks, which are used to prevent personnels or objects from falling, restrict
personnels’ activities, and block particles and vision during construction and equipment
and facility operation.
This document does not apply to safety nets used during emergency rescue and fire
operations.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this
document and are indispensable for its application. For dated references, only the
edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
GB/T 5455-2014, Textiles - Burning behaviour - Determination of damaged length,
afterglow time and afterflame time of vertically oriented specimens
GB/T 8834, Fibre ropes - Determination of certain physical and mechanical
properties
GB/T 10125, Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 12903-2008, Personal protective equipment terminology
GB/T 14522, Artificial weathering test method for plastics, coating and rubber
materials used for machinery industrial products - Fluorescent UV lamps
GB/T 14645, Textiles - Burning behaviour - 45° test determination of damaged area
and ignition times
GB/T 21292, Fishing nets - Determination of mesh breaking force of netting
3 Terms and definitions
For the purpose of this document, the following terms and definitions, as well as those
given in GB/T 12903-2008, apply.
3.1
safety nets
Nets used to prevent personnels (or objects) from falling, reduce injuries from falling,
restrict the movement of personnels (or objects), or block particles such as dust and
sight.
3.2
horizontal safety nets
Safety nets whose mounting surface is not perpendicular to the horizontal plane.
3.3
vertical safety nets
Safety nets whose mounting surface is perpendicular to the horizontal plane.
3.4
knot
Structure for fixing the relative position of the net ropes and the shape of the mesh,
which is formed by the net ropes being intertwined and squeezed against each other
under tension.
3.5
round button with hole
Ring-shaped button with a hole in the middle, on the safety nets, which is made of metal
or other hard materials.
3.6
border ropes
Ropes connected to the net body along the edge of the net body.
3.7
tie ropes
trapezoidal method tearing stress
The maximum tensile force measured when a trapezoidal test sample is torn when it is
stretched.
Note. The unit of trapezoidal method tearing stress is Newton (N).
4 Classification, protection level and marking
4.1 Classification
4.1.1 Classification by usage
Safety nets are divided into the following categories according to different usages.
-- Horizontal safety nets;
-- Vertical safety nets.
4.1.2 Classification by manufacturing process
Safety nets are divided into the following categories according to different
manufacturing processes.
-- Twisted woven safety net;
-- Brushed warp knitted safety net;
-- Dip coated safety net.
Note 1.Twisted woven safety nets are made of natural fibers (such as cotton and linen)
or synthetic fibers (such as nylon, vinylon, polyester, aramid, etc.) as raw
materials using a multi-strand twisted rope making process combined with
manual or mechanical weaving technology.
Note 2.Brushed warp knitted safety nets are made of synthetic materials [such as
high-density polyethylene (HDPE), linear low-density polyethylene
(LLDPE), polypropylene (PP), polyamide (PA), etc.] as raw materials. It is
made into high-strength monofilament through processes such as melt
extrusion and stretching, and then processed into shape through multiple
processes such as weaving, cutting, sewing and riveting on a warp knitting
machine.
Note 3.Dip coated safety nets are made of synthetic fiber cloth (such as polyester,
nylon, aramid) or metal wire mesh as the raw materials. Through an
impregnation process, functional coatings such as resin, flame retardant, and
antistatic agent are penetrated into the interior of the net body fibers. After
high-temperature curing, a dense coating is formed. The nets are then
processed and shaped through cutting, sewing, and riveting.
4.2 Protection level
Safety nets are divided into the following protection levels according to the hanging
method and protection function.
-- Grade SⅠ safety net. adopting horizontal hanging method to form a buffer
barrier after the personnel or object falls, so that the personnel or object is
suspended inside the net body to avoid collision with the work platform or the
ground;
-- Grade SⅡ safety net. using horizontal hanging method to prevent THE
personnel or object from falling;
-- Grade CⅠ safety net. adopting vertical hanging method to limit the working
area of personnel or prevent object from exceeding the preset use range, with
the function of restraining the boundaries of dangerous areas and the
movement trajectory of objects.
-- Grade CⅡ safety net. adopting vertical hanging method to block dust and other
particles and vision, with the function of blocking dust and other particles and
visual shielding.
Note 1.Grade SⅠ safety nets are usually used in high-rise building construction,
bridge construction protection, industrial equipment maintenance platform
and other work scenarios where personnels or objects may fall from heights.
Note 2.Grade SⅡ safety nets are usually used in work scenarios where there is a risk
of personnels or objects falling, such as facade protection, pipe shafts,
elevator shafts, and edge protection of aerial work platforms.
Note 3.Grade CⅠ safety nets are usually used to isolate dangerous work areas, fence
amusement facilities, restrict unauthorized entry, and prevent personnels or
objects from exceeding the safe operating range.
Note 4.Grade CⅡ safety nets are usually used in work scenarios such as dust control
in construction sites, mine blasting operations, blocking the spread of high-
temperature metal dust, and preventing strong light from interfering with the
operator's vision.
4.3 Marking
4.3.1 Marking of usage
The usage of the safety nets is marked as.
-- Horizontal safety nets are represented by the letter P;
-- Vertical safety nets are represented by the letter L.
4.3.2 Marking of manufacturing process
The manufacturing process of the safety nets is marked as.
-- Twisted woven safety nets are represented by the letters BZ;
-- Brushed warp knitted safety nets are represented by the letter JB;
-- Dip coated safety nets are represented by the letters TF.
4.3.3 Marking method
The marking of safety net products consists of four parts. usage, manufacturing process,
product specifications and dimensions, and grade.
Example 1.Flame retardant safety net, horizontal hanging, twisted woven, 3 m wide,
6 m long, for preventing personnels or objects from sustained falling, P-BZ-3×6 SⅠ,
flame retardant.
Example 2.Non-flame retardant safety net, horizontal hanging, twisted woven, 4 m
wide, 8 m long, for preventing personnels or objects from sustained falling, P-BZ-4×8
SⅠ.
Example 3.Safety net, horizontal hanging, twisted woven, 2 m wide, 2 m long, for
preventing personnels or objects from falling, P-BZ-2×2 SⅡ.
Example 4.Safety net, vertical hanging, dip coated, 2 m wide and 6 m long, for
preventing personnels or objects from exceeding a preset range, L-TF-2×6 CⅠ.
Example 5.Safety net, vertical hanging, brushed warp knitted, 1.8 m wide, 6 m long,
for preventing particulate matter and vision, L-JB-1.8×6 CⅡ.
Note. Twisted woven safety nets are divided into flame retardant and non-flame
retardant types. Flame retardant products have the word "flame retardant"
clearly indicated in the classification mark. Brushed warp knitted and dip
coated safety nets are all flame retardant products, so the word "flame
retardant" is no longer marked.
5 Technical requirements
5.1 Structural design
5.1.1 Twisted woven safety net
5.1.1.1 The rope ends shall be braided, scorched, etc. and shall not come undone.
5.1.1.2 All nodes on the net body shall be fixed.
5.1.1.3 The mesh size shall not be greater than 8 cm.
5.1.1.4 If there are tie ropes, they shall be firmly connected to the net body and shall be
evenly distributed along the edge of the net body. The distance between two adjacent
tie ropes shall not be greater than 75 cm, and the length of the tie ropes shall not be less
than 80 cm.
5.1.1.5 If there are tendon ropes, the distance between two adjacent tendon ropes shall
not be less than 30 cm.
5.1.1.6 When the tendon rope and the tie rope are integrated, the tie rope part shall be
lengthened and, after being fastened with the border rope, folded back and fastened
with the border rope to form at least two ropes.
5.1.1.7 The allowable deviation between the length and width of the net body and the
corresponding directions of its nominal specifications shall be ±4%.
5.1.2 Brushed warp knitted safety net
5.1.2.1 There shall be no skipped stitches or missed seams, and the seam edges shall be
even.
5.1.2.2 There shall be no yarn breakage, holes, deformation or other warp knitting
defects that would hinder use.
5.1.2.3 The round button with hole on each edge shall be firm and reliable.
5.1.2.4 The width shall not be less than 1.0 m, with an allowable deviation of ±4%.
5.1.2.5 The round button with hole shall not be less than 8 mm.
5.1.2.6 The mesh shall not be larger than φ2 mm.
5.1.3 Dip coated safety net
5.1.3.1 There shall be no skipped stitches or missed seams, and the seam edges shall be
even.
5.1.3.2 The surface coating shall evenly cover the net body fibers without any missing
coating, sagging, orange peel or local accumulation.
5.1.3.3 The round button with hole on each edge shall be firm and reliable.
5.1.3.4 The width shall not be less than 1.0 m, with an allowable deviation of ±1%.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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