SPIDER® develops advanced technical designs for permanent and temporary fall protection systems, in compliance with UNI 11560:2022 and the specific technical standards for anchorage devices. The design of fall protection systems is supported by structural verifications according to Eurocodes and national Construction Technical Standards.
The service covers all phases: preliminary analysis, executive design, structural calculation, graphic documents, and technical file.
Technical survey and preliminary analysis
Characterization of the load-bearing structure and roof covering
Identification of access points and safe paths on the roof
Assessment of possible fall scenarios and the actual fall factor
Identification of installation points compatible with geometries and intended use
Definition of the anchor layout according to UNI 11560:2022
Selection of devices (type, materials, certifications)
Evaluation of the device–structure interaction
System modeling to verify required clearance height and compatibility with spaces and use modes
The checks include:
determination of maximum forces transmitted to the structure by the fall protection system
verification of fixing points according to reference standards (e.g., Eurocodes and NTC)
local analysis of the support using SLS/ULS methods
possible FEM analysis for complex structures or custom-designed solutions
Executive drawings with plans, sections and construction details
Assembly diagrams for qualified installers
Technical file compliant with UNI 11560:2022 and complete with all attachments
Roof Technical Document (ETC)
Every lifeline system design begins with a preliminary analysis phase, which is essential for understanding the operational and structural context. During this phase, the type of roof covering, the structural materials, the roof build-up stratigraphy and the presence of interfering elements such as skylights, systems or photovoltaic panels are assessed.
The aim is to identify the working routes, the areas at risk of falling and the methods of access to the roof, in order to design a system that allows operators to move safely during ordinary and extraordinary maintenance activities.
The correct assessment of loads is one of the central elements of a lifeline system project. The system must be sized not only to withstand static load, but above all the dynamic stresses generated by arresting a fall.
The main loads to be considered include:
Where relevant, it may also be necessary to consider:
These loads must be correctly combined in accordance with the Italian Technical Standards for Construction (NTC) and the Eurocodes, applying the safety coefficients and factors set out in the regulations.
The verifications vary depending on the type of supporting structure. A reinforced concrete roof requires checks on the strength of the concrete and the anchoring depth of the fixings. Wooden roofs require checks on the load-bearing sections and on how loads are distributed. Steel or corrugated sheet metal structures require checks on thicknesses, fixings and any local reinforcements needed.
The verifications include:
The sizing of the lifeline system’s components depends on several design factors. The type of device (single anchor points, flexible lines or rigid guides), the span length, the number of operators and the permissible deflections all directly affect the stresses transmitted to the structure.
In industrial settings, for example, rigid systems are often preferred, as they allow for greater control over deflection and reduce the forces transmitted to the anchor points.
A complete lifeline system project must be accompanied by detailed technical documentation, including the calculation report, technical drawings, installation data sheets, declarations of conformity and the use and maintenance manual.
In Lombardy, these documents come together to form:
When standard solutions on the market are not suitable for the structure’s characteristics or for specific operational needs, we design and manufacture tailor-made special products: completely customized anchor devices and fall-protection systems, engineered according to technical criteria and compliant with current standards.
These solutions address typical needs of complex environments such as irregular roofs, historical buildings, non-standard steel structures, industrial plants and spaces with particular geometries.
The development of bespoke special products follows a rigorous engineering process:
Preliminary analysis of the operational context and structural constraints.
3D CAD modelling to define the geometry of the device.
FEM analysis to assess stresses, deformations and load distributions.
Calculation of loads transmitted to the structure according to NTC and Eurocodes.
Verification of safety factors and compatibility with the supporting structure.
Preparation of construction drawings for manufacturing.
Preparation of technical documentation (manuals, instructions, data sheets, technical file).
Design compliant with the most up-to-date technical standards.
High-level expertise in local structural verification for anchor devices.
Complete documentation for installation, testing and periodic inspections.
Reduced risk of non-compliance and greater technical reliability.
Support for engineering firms, HSE managers and site supervisors in all project phases.
Spider Linee Vita operates as a specialist technical partner in the design of lifeline systems, offering a comprehensive service that includes risk analysis, structural design, supply, installation and testing.
When standard solutions available on the market are not suitable for the characteristics of the structure or for specific operational requirements, we design and manufacture special bespoke products: fully customised anchor devices and fall-arrest systems, developed according to engineering criteria and compliant with current technical standards.
These solutions meet the typical needs of complex settings, such as irregular roofs, historic buildings, non-standard metal structures, industrial plants and environments with unusual geometries.
Technical Development Methodology:
The development of special bespoke products follows a rigorous engineering process:
Check Whether Your Roof Is Truly Safe
With our roof risk analysis service, we assess regulatory compliance, structural issues and the most suitable fall-arrest solutions for your building.
