Architectural Design Guidelines
Introduction
Windows and glazing are important architectural components of healthcare facilities because they influence daylight, visual comfort, patient privacy, thermal performance, safety, ventilation strategies and the relationship between indoor spaces and the external environment.
In hospital architecture, window design requires a more coordinated approach than in many ordinary buildings. A window that works well in a general patient room may be unsuitable for an operating theatre, an airborne infection isolation room, an intensive care unit or a behavioural health facility.
Architects must therefore consider the clinical function of each room, the vulnerability of its occupants, the local climate, the building services strategy and the requirements for cleaning and maintenance before selecting a window system.
This guide explains the principal design considerations, glazing technologies, clinical applications and coordination requirements for windows in hospitals, clinics and other healthcare buildings.
What Are Windows and Glazing in Healthcare Facilities?
Windows in healthcare facilities are openings or glazed assemblies incorporated into external walls, internal partitions or façades to provide daylight, views, controlled ventilation where appropriate, and visual connection between spaces.
Glazing refers to the transparent or translucent material installed within a window, door, partition or façade system. Depending on the application, it may consist of single glass, laminated safety glass, tempered glass, insulating glass units, fire-rated glazing or other specialist products.
The primary objective of healthcare window design is to provide useful daylight and an appropriate visual environment while maintaining patient safety, privacy, infection prevention, environmental control and long-term building performance.
A successful design balances five key objectives:
- Patient comfort and access to natural light.
- Clinical safety and appropriate environmental control.
- Thermal, solar and acoustic performance.
- Privacy, security and accessibility.
- Cleaning, inspection, replacement and lifecycle maintenance.
1. Importance of Windows in Hospital Architecture
1.1 Natural daylight and visual comfort
Daylight helps occupants perceive time, understand their surroundings and experience a visual connection with the outdoors. Windows can also improve the quality of the patient environment by providing views of gardens, trees, courtyards or the wider landscape.
However, simply increasing the glazed area does not guarantee a better interior environment. Excessive direct sunlight can produce glare, overheating and uncomfortable contrasts between bright windows and darker room interiors.
Architects should consider the direction of daylight, window-head height, external shading, glazing transmittance, internal finishes and the position of beds, desks and clinical equipment.
1.2 Patient well-being and dignity
In general patient accommodation, external views and daylight can make the environment feel less enclosed. A view of vegetation, a courtyard or a distant landscape may be preferable to a view of service yards, parking areas or neighbouring windows.
For patients who spend long periods in bed, the viewing zone should be considered from a reclining position rather than only from a standing eye level.
Privacy must be addressed simultaneously. Appropriate façade orientation, sill heights, external screening, blinds and carefully positioned neighbouring buildings can reduce unwanted overlooking without unnecessarily eliminating daylight.
Daylight should be understood as a supportive environmental design strategy, not as a guaranteed treatment or a substitute for clinical care.
1.3 Infection prevention and environmental control
Windows can influence ventilation and the movement of air into and out of healthcare spaces.
In naturally ventilated areas, suitably designed opening windows may support fresh-air movement when outdoor conditions and the clinical function permit.
In mechanically ventilated clinical areas, uncontrolled window opening can interfere with intended airflow patterns, room pressure relationships, temperature control and filtration. The US Centers for Disease Control and Prevention (CDC) identifies sealed windows and appropriate ventilation-system performance as important considerations in specialised healthcare environments. See the CDC’s environmental infection-control guidance.
For this reason, architects should coordinate window specifications with the mechanical and infection-prevention teams. Natural ventilation must not be assumed appropriate for every hospital department.
1.4 Energy efficiency and thermal comfort
Glazing affects heat transfer, solar heat gain, daylight transmission and the energy required for heating, cooling and artificial lighting.
Large areas of poorly specified glass can increase cooling loads in hot climates or increase heat loss in colder climates. High-performance glazing, suitable orientation and external shading can help manage these effects.
The correct solution depends on the climate, façade orientation, occupancy pattern, internal heat gains, building-services strategy and energy-performance targets.
1.5 Safety and security
Healthcare buildings accommodate people with different physical abilities, cognitive conditions and levels of vulnerability. Window systems should therefore be evaluated for impact safety, opening control, fall prevention, tampering, security and, where applicable, behavioural-health risks.
Safety depends on the complete assembly: glass, frame, fixings, hardware, anchorage and the surrounding construction. Selecting a particular glass type alone does not establish that the complete window system is safe.
2. Types of Windows Used in Healthcare Facilities
Window selection should follow the function of the room rather than a uniform specification for the entire hospital.
2.1 Fixed windows
Fixed windows do not open. They provide daylight and views while allowing the façade to remain closed.
Typical applications: Mechanically ventilated clinical rooms, operating theatres and other spaces where the ventilation strategy requires a sealed envelope.
Advantages include fewer moving components, reduced risk of unauthorised opening and potentially improved airtightness. However, fixed windows require a separate strategy for ventilation, outdoor cleaning, inspection and replacement.
2.2 Casement windows
Casement windows are hinged at the side and swing inward or outward.
They can provide a relatively large opening for ventilation, but their projecting leaves may interfere with circulation, furniture, equipment or external access. Opening direction, restrictors, security and wind loading must be carefully considered.
They may be appropriate in selected naturally ventilated, non-critical areas when permitted by the project requirements.
2.3 Awning windows
Awning windows are generally hinged at the top and open outward from the bottom.
They can provide controlled openings in some applications. Nevertheless, their suitability in a multi-storey healthcare building depends on the specific system, façade conditions, wind behaviour, smoke considerations, maintenance and applicable regulations.
They should not be selected solely because they are commonly used in residential construction.
2.4 Hopper windows
Hopper windows typically hinge at the bottom and open inward at the top.
Their inward projection may obstruct movement or conflict with equipment. Their suitability should be assessed against patient safety, opening geometry, ventilation requirements and the applicable fire and building provisions.
2.5 Sliding windows
Sliding windows move horizontally or vertically within a frame.
They avoid the large swing area of casement windows, but their opening area is generally limited by the configuration. Track cleaning, drainage, locking and long-term hardware maintenance are important considerations in healthcare settings.
2.6 High-level windows and clerestory glazing
High-level glazing can introduce daylight deeper into a space while limiting direct views into or out of the room. It can be particularly useful in circulation areas, waiting areas and selected support spaces.
Its effectiveness depends on ceiling geometry, solar exposure, internal reflectance and the depth of the space. High-level windows do not automatically provide adequate daylight to the occupied zone.
2.7 Internal glazing and borrowed-light windows
Internal glazing allows daylight or visual connection to pass between adjacent spaces.
It can be useful where an external wall is unavailable, but it does not provide an external view or fresh air. Privacy, acoustic separation, fire compartmentation, cleaning and clinical observation requirements must be considered.
3. Types of Glass and Glazing Systems
Glass selection should be based on the required safety classification, thermal and solar performance, acoustic needs, appearance, cleaning regime and project-specific regulations.
| Glazing type | Main characteristics | Potential healthcare applications | Important considerations |
|---|---|---|---|
| Annealed glass | Standard flat glass; breaks into relatively large, sharp fragments | Limited applications where safety requirements permit | Not a default choice for impact-prone locations |
| Tempered glass | Heat-treated glass with increased resistance to thermal stress and a characteristic break pattern | Selected doors, partitions and other approved applications | Breaks into fragments; does not retain them as laminated glass does |
| Laminated safety glass | Glass layers bonded with an interlayer that can retain fragments after breakage | Patient-accessible areas, overhead glazing and other locations where specified | Interlayer, edge protection, support and system performance matter |
| Insulating glass unit (IGU) | Two or more panes separated by a sealed cavity | External façades requiring improved thermal performance | Spacer, seal, cavity, frame and edge detailing affect durability |
| Low-emissivity (low-E) glazing | Coating designed to manage radiative heat transfer | Energy-conscious external façades | Coating selection should reflect the climate and solar-control objectives |
| Solar-control glazing | Designed to reduce selected solar radiation while admitting a controlled amount of visible light | Sun-exposed façades | Excessive tint or solar control can reduce useful daylight and alter colour perception |
| Fire-rated glazing | Tested and classified system for specified fire-performance requirements | Locations where fire-rated glazing is required | Fire resistance, integrity, insulation and framing must match the approved assembly |
| Security glazing | Specialised glass or glazing assembly designed for defined security or impact requirements | Selected high-risk or vulnerable patient areas | The required threat level and system testing must be established |
| Electrochromic or switchable glazing | Glazing with adjustable optical properties or privacy | Selected patient rooms, consultation areas and specialist interiors | Controls, power, cleaning, failure modes and clinical suitability require evaluation |
These categories are not interchangeable. For example, tempered glass is not automatically a substitute for laminated safety glazing where post-breakage retention is necessary. Likewise, ordinary laminated glass should not automatically be described as security glazing without evidence that it meets the required performance classification.
4. Key Architectural Design Considerations
4.1 Building orientation and solar exposure
Window orientation determines the timing and intensity of sunlight entering the room. East- and west-facing façades can receive difficult low-angle sunlight, while other orientations may experience substantial seasonal or midday solar exposure depending on latitude and surrounding obstructions.
The architect should study:
- Site latitude and local climate.
- Orientation of each façade.
- Seasonal sun angles and shading.
- Surrounding buildings and landscape.
- Patient-bed and workstation positions.
- Daylight requirements and glare risk.
- Cooling demand and thermal comfort.
External shading devices, recessed openings, balconies, fins, overhangs and appropriate glazing can be combined to control solar exposure. The best arrangement is climate-specific.
4.2 Window-to-wall ratio
The window-to-wall ratio (WWR) is the proportion of a façade’s gross area occupied by windows or glazing, measured using a clearly defined project method.
A higher WWR may increase daylight and views but can also increase solar heat gain, glare, heat loss, cost and cleaning requirements.
There is no single ideal WWR for every healthcare facility. The appropriate ratio should emerge from daylight studies, energy modelling, room function, façade orientation and applicable code requirements.
4.3 Window size and sill height
Window dimensions should be based on the occupied space, not solely on façade composition.
Consider:
- The view from a seated or reclining patient.
- Privacy from adjacent buildings.
- The position of beds, worktops and clinical equipment.
- Wall-mounted medical services and furniture.
- Fall prevention and safe opening limits.
- Structural lintels, façade modules and maintenance access.
A high sill may improve privacy or allow furniture placement, but it may also eliminate the patient’s view of the outdoors. A low sill can improve the outlook but may require additional protection or a different glazing specification.
4.4 Daylight and glare control
Useful daylight depends on both quantity and distribution. Deep rooms with small openings may receive bright daylight near the façade but insufficient light at the rear.
Possible strategies include:
- Appropriate window-head height.
- Light-coloured ceilings and selected reflective surfaces.
- External solar shading.
- Glazing with suitable visible-light transmittance.
- Internal blinds designed for the clinical environment.
- Daylight simulation and glare assessment.
- Careful placement of monitors and clinical workstations.
Internal blinds should not be considered the only response to excessive solar gain. External shading often intercepts sunlight before it enters the building, although its feasibility depends on façade access, weather exposure, fire strategy and maintenance.
4.5 Thermal performance
Three glazing properties are particularly useful during specification:
U-factor or U-value: Describes heat transfer through the glazing or window assembly. Lower values generally indicate better resistance to heat transfer; confirm the measurement convention used by the applicable standard.
Solar heat gain coefficient (SHGC): Describes the fraction of incident solar radiation admitted as heat through the glazing system under the relevant rating method. Lower values generally reduce solar heat gain.
Visible transmittance (VT): Describes the proportion of visible light transmitted through the glazing.
These properties must be evaluated together. Selecting glass solely for a low SHGC may unnecessarily reduce daylight, while maximising visible transmittance without considering solar exposure can increase glare and cooling loads.
The US Department of Energy provides an accessible explanation of window types, insulating glazing and low-E coatings.
4.6 Acoustic performance
Healthcare buildings may be exposed to traffic, aircraft, construction, ambulance activity and other external noise sources.
The acoustic performance of a window depends on the complete assembly, including glass thickness, laminated interlayers, cavity configuration, seals, frame construction and installation quality.
Noise control is particularly important for consultation rooms, recovery areas, patient bedrooms and rooms used for confidential communication. Acoustic requirements should be set by a project-specific assessment rather than by glass thickness alone.
4.7 Privacy and observation
Privacy is essential in examination rooms, consultation rooms, patient bedrooms and sanitary spaces.
Design strategies include:
- Orientation away from public approaches.
- Appropriate sill and head heights.
- External landscape screening.
- Blinds or curtains with maintainable hardware.
- Obscure glazing where a view is unnecessary.
- Carefully located internal observation glazing.
- Controlled views into clinical spaces.
Privacy measures must be reconciled with clinical observation, safeguarding, daylight and emergency access. Switchable privacy glass may be considered in selected applications, but its failure mode and cleaning requirements must be understood.
5. Windows for Different Hospital Departments
A hospital should not use the same window specification for every room. Clinical requirements and occupant risks vary substantially between departments.
| Department or space | Typical design approach | Key coordination issue |
|---|---|---|
| General patient bedrooms | Daylight, useful external views, privacy and appropriate solar control | Patient comfort, falls and cleaning access |
| Intensive care unit (ICU) | Daylight and views where practical, with controlled environmental conditions | Medical equipment, observation and HVAC |
| Operating theatre | A sealed, controlled envelope where required by the clinical design | Ventilation, pressure relationships, infection prevention and equipment |
| Airborne infection isolation room | Window system coordinated with the specified ventilation and pressure-control strategy | Airtightness and prevention of uncontrolled airflow |
| Protective environment room | Controlled envelope and filtration strategy for vulnerable patients | Infiltration control and HVAC performance |
| Emergency department | Durable, secure glazing with appropriate daylight and privacy | Rapid patient movement, observation and operational security |
| Consultation and examination rooms | Privacy, glare control and a suitable visual environment | Confidentiality and examination requirements |
| Waiting areas | Daylight, views and manageable glare | Thermal comfort, crowding and privacy |
| Corridors and circulation areas | Daylight where useful, including high-level or borrowed-light solutions | Wayfinding, fire separation and maintenance |
| Behavioural health units | Risk-assessed, tamper-resistant and appropriate impact-resistant systems | Self-harm prevention, escape prevention and patient dignity |
| Laboratories and diagnostic support spaces | Glazing based on the specific clinical process | Environmental control, equipment, privacy and specialised safety |
These are design approaches, not universal prescriptions. The final specification must reflect the actual clinical brief and the standards adopted for the project.
6. Window Design for Critical Clinical Environments
6.1 Operating theatres
Operating theatres require carefully controlled environmental conditions. Window design must therefore be coordinated with the theatre ventilation system, infection-prevention strategy, lighting design and clinical workflow.
Where the adopted healthcare guidance calls for sealed or non-openable windows, opening components should not be introduced merely to provide natural ventilation. Daylight may still be considered if it does not compromise environmental control, equipment operation or the intended clinical conditions.
6.2 Intensive care units
ICUs accommodate patients who may be unable to adjust their own environment or communicate discomfort effectively.
Windows should be assessed for glare on monitors, privacy, visual comfort, safe access, thermal stability and compatibility with clinical equipment. The view should be considered from the patient’s actual bed position.
Window operation, blinds and maintenance access should be designed so that routine activities do not obstruct staff circulation or compromise patient safety.
6.3 Isolation rooms
Isolation rooms may require specific pressure relationships, filtration and controlled air movement.
An opening window can undermine these arrangements if it introduces uncontrolled air or changes the pressure balance. The window assembly should therefore be coordinated with the mechanical engineer and infection-prevention specialist.
The clinical classification of the room determines the required approach; not every room labelled “isolation” has identical ventilation requirements.
6.4 Behavioural health facilities
Behavioural health facilities require particular attention to the possibility of self-harm, escape and damage to the window assembly.
The design assessment may need to address impact resistance, fragment retention, frame and anchor strength, opening restrictors, tamper-resistant hardware, blind systems and the prevention of ligature opportunities.
The requirements depend on the patient population, level of supervision, risk assessment and applicable healthcare guidelines. Ordinary residential safety assumptions are not sufficient for these environments.
7. Window Frames and Construction Materials
Window frames should be selected according to structural performance, corrosion exposure, thermal performance, cleaning, durability, availability and maintenance capacity.
| Frame material | Advantages | Limitations and considerations |
|---|---|---|
| Aluminium | Durable, relatively lightweight and suitable for many façade systems | Thermal breaks may be needed; coating and corrosion resistance must suit the exposure |
| uPVC | Low routine maintenance and useful thermal properties in appropriate systems | Performance depends on product quality, reinforcement, fire requirements, climate and exposure |
| Timber | Warm visual character and potential suitability for selected interiors | Requires protection and maintenance; suitability depends on moisture, hygiene and fire considerations |
| Steel | High strength and slender profiles can be achieved | Corrosion protection, thermal bridging and maintenance require attention |
| Composite systems | Can combine selected material advantages | Performance, repairability, interfaces and long-term product support need verification |
No frame material is universally best for hospitals. The selection should be based on the required performance of the complete tested or engineered window system.
8. Window Cleaning, Maintenance and Replacement
Maintenance is a design issue, not an operational afterthought.
Large hospital façades can contain hundreds or thousands of glazed units. If cleaning access, seal replacement or glass removal is not considered during design, routine maintenance can become costly and hazardous.
Architects should consider:
- Safe external access for cleaning and inspection.
- Whether window components can be removed or replaced without major disruption.
- Drainage paths, weep holes and protection against water ingress.
- Accessibility of seals, hinges, locks and restrictors.
- Compatibility with approved cleaning agents.
- Resistance to corrosion and weathering.
- Access equipment, anchor points and fall-protection provisions.
- The effect of maintenance work on occupied clinical areas.
Fixed glazing can simplify the opening hardware but may make replacement or cleaning more difficult. Operable glazing may offer access from inside in some configurations, but this must be confirmed through a safe, engineered maintenance strategy.
Access methods and safety systems must comply with the applicable occupational safety requirements. Window cleaning should not rely on unsafe improvised access.
9. Coordination with Building Services and Other Disciplines
Healthcare windows interact with structural systems, HVAC, electrical installations, fire safety, interiors and external works.
9.1 Structural coordination
Window openings must be coordinated with beams, columns, lintels, slabs, façade anchors and movement joints.
The design should address wind loads, glass support, frame deflection, building movement, seismic conditions where relevant and the consequences of glass breakage.
Large or unusual glazing assemblies may require specialist structural design and testing.
9.2 HVAC coordination
The architect and mechanical engineer should agree on whether the window is fixed or operable and how the room will achieve its required ventilation.
For mechanically controlled spaces, window leakage and unauthorised opening can affect pressure relationships and temperature control. Opening windows may also introduce outdoor pollutants or moisture.
9.3 Electrical and controls coordination
Motorised blinds, electrochromic glazing, window actuators and automated façade systems require appropriate power, controls and maintenance access.
Their operation should not interfere with clinical equipment, emergency procedures or the needs of occupants with limited mobility.
9.4 Fire and life safety
Glazing can form part of a façade, internal partition or fire-resisting assembly. The relevant fire strategy may govern the location, classification, framing and installation of the glazing.
Architects should verify the required fire performance, compartmentation, external fire-spread provisions and applicable restrictions on openings. Ordinary glazing should not be assumed to provide a fire-resisting barrier.
9.5 Interior design and medical equipment
Bed locations, examination lights, monitors, medical service panels, privacy curtains, storage units and workstations should be coordinated with window positions.
This coordination helps avoid glare, blocked views, inaccessible controls and conflicts between opening leaves and equipment.
10. Design Standards and Regulatory Considerations
Window and glazing requirements depend on the project location, facility type, adopted regulations and applicable editions of technical standards.
For healthcare projects in India
The National Building Code of India 2016 (NBC 2016), published by the Bureau of Indian Standards (BIS), includes provisions relevant to building requirements, fire and life safety, structural design, glass and glazing, natural ventilation, mechanical ventilation and sustainability. https://www.bis.gov.in/standards/national-building-code/
The design team should consult the relevant parts of the code, applicable Indian Standards, local building bye-laws, fire authority requirements and project-specific healthcare guidelines.
Do not assume that an internationally published healthcare guideline is automatically mandatory in India. Its applicability depends on adoption, contractual requirements and the authority having jurisdiction.
International healthcare guidance
NHS England’s Health Building Note 00-10 includes Part D, which addresses windows and associated hardware. The guidance discusses sunlight, natural ventilation, viewing zones and specialist clinical considerations. https://www.england.nhs.uk/publication/design-for-flooring-walls-ceilings-sanitary-ware-and-windows-hbn-00-10/
The Facility Guidelines Institute (FGI) publishes healthcare facility design guidance for the United States. The applicable edition and local adoption should be confirmed before using its provisions as a project requirement. https://fgiguidelines.org/codes/editions/
Important: A numerical glazing-area requirement or opening-window rule should never be copied from another country’s guidance and presented as a universal hospital design standard. Verify the exact source, edition, scope, exceptions and local applicability before placing it on a construction drawing.
11. Advantages of Well-Designed Hospital Windows
Well-designed window systems can provide:
- Useful daylight and an improved visual connection with the outdoors.
- Better control of glare and unwanted solar heat.
- Greater patient privacy and dignity when carefully planned.
- Improved façade energy performance when the glazing is appropriately selected.
- Reduced external noise in suitable acoustic systems.
- Easier cleaning and more predictable maintenance.
- Better integration between architectural design and building services.
- A more coherent relationship between patient spaces, courtyards and landscape.
These benefits depend on the quality of the design and installation. They should not be assumed from window size or glass specification alone.
12. Common Mistakes in Healthcare Window Design
Mistake 1: Using the same window specification throughout the hospital
Different clinical spaces have different safety, ventilation and environmental requirements.
Better approach: Prepare a room-by-room window schedule linked to the clinical brief and risk assessment.
Mistake 2: Maximising glass area without studying glare
Large windows can create bright patches, reflections and uncomfortable solar exposure.
Better approach: Evaluate orientation, shading, visible transmittance and the position of beds and workstations.
Mistake 3: Specifying opening windows in controlled clinical areas without coordination
Uncontrolled openings may conflict with pressure control and ventilation requirements.
Better approach: Confirm window operation with the mechanical engineer and infection-prevention team.
Mistake 4: Selecting glass based on appearance alone
Visual appearance does not establish impact safety, thermal performance, acoustic performance or fire resistance.
Better approach: Specify measurable performance criteria and verify the complete assembly.
Mistake 5: Ignoring the patient’s view
A window may provide daylight while offering no useful view to someone lying in bed.
Better approach: Test the view from realistic seated and reclining eye positions.
Mistake 6: Leaving cleaning access until the construction stage
Difficult access can increase maintenance costs and expose workers to unnecessary risk.
Better approach: Develop the façade maintenance strategy during design development.
Mistake 7: Copying dimensions or percentages without checking the source
Requirements differ by jurisdiction, room type and document edition.
Better approach: Cite the adopted standard and verify its scope before finalising drawings.
13. Practical Design Checklist for Architects
Before issuing the window schedule or glazing specification, confirm the following:
- Clinical function and room risk classification are established.
- Fixed or operable window requirements are confirmed.
- Daylight, glare and external views have been assessed.
- Privacy and patient observation needs are resolved.
- Solar heat gain and thermal performance are suitable for the climate.
- Acoustic performance is defined where required.
- Glass safety classification and complete-system performance are verified.
- HVAC, pressure control and infection-prevention requirements are coordinated.
- Structural support, anchorage and movement joints are detailed.
- Fire and life safety provisions are checked.
- Cleaning, inspection, replacement and access arrangements are documented.
- Hardware, blinds, controls and maintenance responsibilities are defined.
- Applicable codes and standards are identified by edition.
- The window schedule is coordinated with architectural, structural, MEP and interior drawings.
Conclusion
Windows and glazing in healthcare facilities must balance daylight, patient comfort, privacy, safety, energy performance and clinical environmental control. The correct solution depends on the function of each room, the needs of its occupants, the local climate and the adopted regulatory framework.
Architects should integrate window design into the early planning of the hospital, coordinate it with the structural and building-services teams, and verify the performance of the complete glazing assembly.
A well-developed window schedule, supported by room-specific requirements, appropriate façade analysis and a safe maintenance strategy, provides a stronger foundation for a durable, comfortable and operationally effective healthcare building.
References
- Bureau of Indian Standards. National Building Code of India 2016. https://www.bis.gov.in/standards/national-building-code/
- NHS England. Health Building Note 00-10: Design for flooring, walls, ceilings, sanitary ware and windows. https://www.england.nhs.uk/publication/design-for-flooring-walls-ceilings-sanitary-ware-and-windows-hbn-00-10/
- US Centers for Disease Control and Prevention. Environmental Infection Control: Air. https://www.cdc.gov/infection-control/hcp/environmental-control/air.html
- US Department of Energy. Window Types and Technologies. https://www.energy.gov/energysaver/window-types-and-technologies
- Facility Guidelines Institute. FGI Code/Guidelines Editions. https://fgiguidelines.org/codes/editions/
The applicable editions and local regulatory requirements should be confirmed for each project before the guidance is used for technical specification or statutory compliance.