Obligations for Crash Barrier System

A designer of a guardrail system has an obligation to ensure that:
the system is designed to be safe and without risks to health when used properly;
the design, if given to someone else to use, is accompanied by information about the way the plant must be used to ensure health and safety.
The designer should consider:

the type of structures the system may be attached to; and
the loads that may be applied if a worker falls against the guardrails.
The Australian Standard AS/NZS4994 (Int) Temporary Roof Edge Protection for Housing and Residential Buildings provides guidance on the testing of roof guardrail systems.

The Australian Standard AS/NZS1657 Fixed Platforms, Walkways, Stairways and Ladders – Design, Construction and Installation provides guidance on design loadings for permanent guardrailing.

The manufacturer of a roof guardrail system has obligations to ensure that:

the system is manufactured to be safe and without risk to health when used properly;
the system, when manufactured, is tested and examined to ensure it will be safe and without risk to health when used properly; and
the system, when supplied to another person, is accompanied by information about the way it must be used to ensure the health and safety of users.
A supplier of a guardrail system has an obligation to either:

examine and test the system to ensure it is safe and without risk to health when used properly; or
ensure the manufacturer has given an assurance that the system has been examined and tested to ensure it is safe and without risk to health and safety when used properly.
The supplier also has an obligation to provide information about how the system must be used to ensure health and safety.

The supplier (Wuhan Dachu Traffic Facilities Co., Ltd) should provide installation instructions to the installer, including the following as a minimum:

details about the supporting structure - member sizes, material type and strength;
maximum guardrail post spacing; and
connector details (i.e. bolting, screwing or clamping method).
The supplier should obtain information from the truss supplier about stiffening required to withstand additional loads.

An installer of a guardrail system has obligations to:

install the system in a way that is safe and without risk to health; and
ensure that nothing about the way the system was installed makes it unsafe and a risk to health when used properly.
To meet these obligations, the installer of the system should:

ensure they have the appropriate competencies (through training, qualification and/or experience) to install the system;
follow the manufacturer's and/or supplier's instructions;
provide written verification about the system at handover to the person being supplied the system; and
ensure the Work Method Statement is completed where applicable and given to the principal contractor before installation work commences.
Handover information should include written verification that:

the guardrail system and supporting structure are structurally adequate (eg.  verification by a suitably qualified engineer); and
the guardrail system has been installed in accordance with the supplier's instructions.