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]]>Vinyl-coated chain link fencing is constructed from galvanized steel wire that is covered with a durable vinyl (PVC) coating, typically in black, green, or brown. This coating enhances the fence’s resistance to weathering while providing a smoother, more visually appealing finish than standard galvanized chain link.
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]]>The post The Use of Glass Railings: A Comparative Study Between the US and Europe appeared first on Barfield Fence and Fabrication.
]]>In the United States, glass railings are often associated with modern and contemporary architectural styles. They are frequently used in high-rise residential buildings, commercial properties, and luxury homes. The focus is on creating a sleek, minimalist look that maximizes natural light and unobstructed views. Key design elements include:
A blend of traditional and contemporary styles influences European design trends for glass railings. While modern architecture favors frameless glass railings similar to those in the US, there is also a strong preference for integrating glass with other materials to reflect the region’s rich architectural heritage. Notable trends include:
In the US, building codes and standards for glass railings are governed by organizations such as the International Building Code (IBC) and the American Society for Testing and Materials (ASTM). Key regulatory considerations include:
The European Committee for Standardization (CEN) and various national bodies set European standards for glass railings. While there is some variation between countries, common regulatory themes include:
The US, the preference for glass railings is driven by a desire for modernity and openness. They are seen as a symbol of luxury and sophistication, often featured in high-end residential and commercial projects. The American preference leans towards minimalism, with clean lines and unobstructed views being highly valued.
European cultural preferences for glass railings are more varied, reflecting the continent’s diverse architectural history. In contemporary settings, glass railings are appreciated for their modern aesthetics and ability to enhance light and space. However, there is also a strong appreciation for traditional materials and designs, leading to innovative combinations that respect historical context while embracing modernity.
Glass railings in the United States and Europe reflect common goals and distinct cultural influences. While both regions prioritize safety, functionality, and aesthetics, their approaches to design and regulation vary, shaped by historical context and cultural preferences. In the US, the emphasis is on modernity and minimalism, whereas in Europe, there is a nuanced blend of tradition and contemporary design. Understanding these differences can provide valuable insights for architects, designers, and builders working in either region, helping them create beautiful and functional spaces.
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]]>The post Loads on Handrails and Guards – FBC 8th (2023) appeared first on Barfield Fence and Fabrication.
]]>Handrails and guards shall be designed and constructed for the structural loading conditions set forth in Section 1607.9.1. Grab bars, shower seats and accessible benches shall be designed and constructed for structural loading conditions set forth in Section 1607.9.2.
Handrails and guards shall be designed to resist a linear load of 50 pounds per linear foot (plf) (0.73 kN/m) in accordance with Section 4.5.1 of ASCE 7. Glass handrail assemblies and guards shall also comply with Section 2407.
Handrails and guards shall be designed to resist a concentrated load of 200 pounds (0.89 kN) in accordance with Section 4.5.1 of ASCE 7.
Balusters, panel fillers, and guard infill components, including all rails except the handrail and the top rail, shall be designed to resist a concentrated load of 50 pounds (0.22 kN) in accordance with Section 4.5.1.2 of ASCE 7.
Grab bars, shower seats and accessible benches shall be designed to resist a single concentrated load of 250 pounds (1.11 kN) applied in any direction at any point on the grab bar, shower seat, or seat of the accessible bench so as to produce the maximum load effects.
Vehicle barriers for passenger vehicles shall be designed to resist a concentrated load of 6,000 pounds (26.70 kN) in accordance with Section 4.5.3 of ASCE 7. Garages accommodating trucks and buses shall be designed in accordance with an approved method that contains provisions for traffic railings.
LOADS ON HANDRAILS AND GUARDS – FLORIDA BUILDING CODE 7TH EDITION (2020)
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]]>The post DOORS, GATES AND TURNSTILES – FBC 8TH (2023) appeared first on Barfield Fence and Fabrication.
]]>Doors in the means of egress shall comply with the requirements of Sections 1010.1.1 through 1010.3.5. Exterior exit doors shall also comply with the requirements of Section 1022.2. Gates in the means of egress shall comply with the requirements of Sections 1010.4 through 1010.4.1. Turnstiles in the means of egress shall comply with the requirements of Sections 1010.5 through 1010.5.4.
Doors, gates and turnstiles provided for egress purposes in numbers greater than required by this code shall comply with the requirements of this section.
Doors in the means of egress shall be readily distinguishable from the adjacent construction and finishes such that the doors are easily recognizable as doors. Mirrors or similar reflecting materials shall not be used on means of egress doors. Means of egress doors shall not be concealed by curtains, drapes, decorations or similar materials.
For accessibility provisions related to doors, refer to the Florida Building Code, Accessibility.
The required capacity of each door opening shall be sufficient for the occupant load thereof and shall provide a minimum clear opening width of 32 inches (813 mm). The clear opening width of doorways with swinging doors shall be measured between the face of the door and the frame stop, with the door open 90 degrees (1.57 rad). Where this section requires a minimum clear opening width of 32 inches (813 mm) and a door opening includes two door leaves without a mullion, one leaf shall provide a minimum clear opening width of 32 inches (813 mm). In Group I-2, doors serving as means of egress doors where used for the movement of beds shall provide a minimum clear opening width of 411/2 inches (1054 mm). The minimum clear height of door openings shall be not less than 80 inches (2032 mm).
There shall not be projections into the required clear opening width lower than 34 inches (864 mm) above the floor or ground. Projections into the clear opening width between 34 inches (864 mm) and 80 inches (2032 mm) above the floor or ground shall not exceed 4 inches (102 mm).
Door closers, overhead door stops, frame stops, power door operators, and electromagnetic door locks shall be permitted to project into the opening height not lower than 78 inches (1980 mm) minimum above the floor.
Egress doors shall be of the side-hinged swinging door, pivoted door or balanced door types.
Side-hinged swinging doors, pivoted doors and balanced doors shall swing in the direction of egress travel where serving a room or area containing an occupant load of 50 or more persons or a Group H occupancy.
The forces to unlatch doors shall comply with the following:
The forces to open doors shall comply with the following:
Forces shall be applied to the latch side of the door.
Where a manual horizontal sliding door is required to latch, the latch or other mechanism shall prevent the door from rebounding into a partially open position when the door is closed.
There shall be a floor or landing on each side of a door. Such floor or landing shall be at the same elevation on each side of the door. Landings shall be level except for exterior landings, which are permitted to have a slope not to exceed 0.25 unit vertical in 12 units horizontal (2-percent slope).
Landings shall have a width not less than the width of the stairway or the door, whichever is greater. Doors in the fully open position shall not reduce a required dimension by more than 7 inches (178 mm). Where a landing serves an occupant load of 50 or more, doors in any position shall not reduce the landing to less than one-half its required width. Landings shall have a length measured in the direction of travel of not less than 44 inches (1118 mm).
Landing length in the direction of travel in Groups R-3 and U and within individual units of Group R-2 need not exceed 36 inches (914 mm).
Thresholds at doorways shall not exceed 3/4 inch (19.1 mm) in height above the finished floor or landing for sliding doors serving dwelling units or 1/2 inch (12.7 mm) above the finished floor or landing for other doors. Raised thresholds and floor level changes greater than 1/4 inch (6.4 mm) at doorways shall be beveled with a slope not greater than one unit vertical in two units horizontal (50-percent slope).
Space between two doors in a series shall be 48 inches (1219 mm) minimum plus the width of a door swinging into the space. Doors in a series shall swing either in the same direction or away from the space between the doors.
Except as specifically permitted by this section, egress doors shall be readily openable from the egress side without the use of a key or special knowledge or effort.
The unlatching of any door or leaf shall not require more than one operation. Manual bolts are not permitted.
Door handles, pulls, latches, locks and other operating devices on doors required to be accessible by Chapter 11 shall not require tight grasping, tight pinching or twisting of the wrist to operate.
Door handles, pulls, latches, locks and other operating devices shall be installed 34 inches (864 mm) minimum and 48 inches (1219 mm) maximum above the finished floor. Locks used only for security purposes and not used for normal operation are permitted at any height.
Access doors or gates in barrier walls and fences protecting pools, spas and hot tubs shall be permitted to have operable parts of the release of latch on self-latching devices at 54 inches (1370 mm) maximum above the finished floor or ground, provided the self-latching devices are not also self-locking devices operated by means of a key, electronic opener or integral combination lock.
Locks and latches shall be permitted to prevent operation of doors where any of the following exist:
MANUAL BOLTS, AUTOMATIC FLUSH BOLTS AND CONSTANT LATCHING BOLTS ON THE INACTIVE LEAF OF A PAIR OF DOORS
Reserved.
Reserved.
Interior stairway means of egress doors shall be openable from both sides without the use of a key or special knowledge or effort.
In Group E occupancies, Group B educational occupancies and Group I-4 occupancies, egress doors from classrooms, offices and other occupied rooms with locking arrangements designed to keep intruders from entering the room shall comply with all of the following conditions:
Remote locking or unlocking of doors from an approved location shall be permitted in addition to the unlocking operation in Item 1.
Swinging doors serving a Group H occupancy and swinging doors serving rooms or spaces with an occupant load of 50 or more in a Group A or E occupancy shall not be provided with a latch or lock other than panic hardware or fire exit hardware.
Refrigeration machinery rooms larger than 1,000 square feet (93 m2) shall have not less than two exit or exit access doorways that swing in the direction of egress travel and shall be equipped with panic hardware or fire exit hardware.
Exit or exit access doors serving transformer vaults, rooms designated for batteries or energy storage systems, or modular data centers shall be equipped with panic hardware or exit hardware. Rooms containing electrical equipment rated 800 amperes or more and that contain overcurrent devices, switching devices or control devices and where the exit or exit access door is less than 25 feet (7620 mm) from the equipment working space as required by NFPA 70, such doors shall not be provided with a latch or lock other than panic hardware or exit hardware. The doors shall swing in the direction of egress travel.
Where panic or fire exit hardware is installed, it shall comply with the following:
If balanced doors are used and panic hardware is required, the panic hardware shall be the push-pad type and the pad shall not extend more than one-half the width of the door measured from the latch side.
Where electrical systems that monitor or record egress activity are incorporated, the locking system shall comply with Section 1010.2.11, 1010.2.12, 1010.2.13, 1010.2.14 or 1010.2.15 or shall be readily openable from the egress side without the use of a key or special knowledge or effort.
Door hardware release of electric locking systems shall be permitted on doors in the means of egress within any occupancy except in Group H where installed and operated in accordance with all of the following:
Sensor release of electric locking systems shall be permitted on doors located in the means of egress with an occupancy in Group A, B, E, I-1, I-2, I-4, M, R-1 or R-2 where installed and operated in accordance with all of the following criteria:
Delayed egress locking systems shall be permitted to be installed on doors serving Group B, F, I, M, R, S and U occupancies in buildings that are equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or an approved automatic smoke or heat detection system installed in accordance with Section 907.
The delayed egress locking system shall be installed and operated in accordance with all of the following:
Electric locking systems, including electro-mechanical locking systems and electromagnetic locking systems, shall be permitted to be locked in the means of egress in Group I-1 or I-2 occupancies where the clinical needs of persons receiving care require their containment. Controlled egress doors shall be permitted in such occupancies where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or an approved automatic smoke or heat detection system installed in accordance with Section 907, provided that the doors are installed and operate in accordance with all of the following:
In buildings within correctional and detention facilities, doors in means of egress serving rooms or spaces occupied by persons whose movements are controlled for security reasons shall be permitted to be locked where equipped with egress control devices that shall unlock manually and by not less than one of the following means:
In other than high-rise buildings and Group I-3, R-3 and R-4 occupancies, electrically locked exit access doors providing egress from elevator lobbies shall be permitted where all the following conditions are met:
Special doors and security grilles shall comply with the requirements of Sections 1010.1.3.1 through 1010.1.3.4.
Revolving doors shall comply with the following:
MAXIMUM DOOR SPEED MANUAL REVOLVING DOORS
| REVOLVING DOOR MAXIMUMNOMINAL DIAMETER (FT-IN) | MAXIMUM ALLOWABLEREVOLVING DOOR SPEED (RPM) |
| 6-0 | 12 |
| 7-0 | 11 |
| 8-0 | 10 |
| 9-0 | 9 |
| 10-0 | 8 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
MAXIMUM DOOR SPEED AUTOMATIC OR POWER-OPERATED REVOLVING DOORS
| REVOLVING DOOR MAXIMUMNOMINAL DIAMETER (FT-IN) | MAXIMUM ALLOWABLEREVOLVING DOOR SPEED (RPM) |
| 8-0 | 7.2 |
| 9-0 | 6.4 |
| 10-0 | 5.7 |
| 11-0 | 5.2 |
| 12-0 | 4.8 |
| 12-6 | 4.6 |
| 14-0 | 4.1 |
| 16-0 | 3.6 |
| 17-0 | 3.4 |
| 18-0 | 3.2 |
| 20-0 | 2.9 |
| 24-0 | 2.4 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
A revolving door used as a component of a means of egress shall comply with Section 1010.3.1 and the following three conditions:
A revolving door used as other than a component of a means of egress shall comply with Section 1010.3.1. The breakout force of a revolving door not used as a component of a means of egress shall not be more than 180 pounds (801 N).
A breakout force in excess of 180 pounds (801 N) is permitted if the breakout force is reduced to not more than 130 pounds (578 N) when not less than one of the following conditions is satisfied:
Where means of egress doors are operated or assisted by power, the design shall be such that in the event of power failure, the door is capable of being opened manually to permit means of egress travel or closed where necessary to safeguard means of egress. The forces required to open these doors manually shall not exceed those specified in Section 1010.1.3, except that the force to set the door in motion shall not exceed 50 pounds (220 N). The door shall be capable of opening from any position to the full width of the opening in which such door is installed when a force is applied to the door on the side from which egress is made. Power-operated swinging doors, power-operated sliding doors and power-operated folding doors shall comply with BHMA A156.10. Power-assisted swinging doors and low-energy power-operated swinging doors shall comply with BHMA A156.19. Low-energy power-operated sliding doors and low-energy power-operated folding doors shall comply with BHMA A156.38.
In other than Group H occupancies, special purpose horizontal sliding, accordion or folding door assemblies permitted to be a component of a means of egress in accordance with Exception 6 to Section 1010.1.2 shall comply with all of the following criteria:
In Groups B, F, M and S, horizontal sliding or vertical security grilles are permitted at the main exit and shall be openable from the inside without the use of a key or special knowledge or effort during periods that the space is occupied. The grilles shall remain secured in the full-open position during the period of occupancy by the general public. Where two or more exits or access to exits are required, not more than one-half of the exits or exit access doorways shall be equipped with horizontal sliding or vertical security grilles.
The temporary installation or closure of storm shutters, panels and other approved hurricane protection devices shall be permitted on emergency escape and rescue openings and egress doors in Group R occupancies during the threat of a storm. Such devices shall not be required to comply with the operational constraints of Section 1030.4 or 1010.2. While such protection is provided, at least one means of escape from the dwelling or dwelling unit shall be provided. The means of escape shall be within the first floor of the dwelling or dwelling unit and shall not be located within a garage without a side-hinged door leading directly to the exterior. Occupants in any part of the dwelling or dwelling unit shall be able to access the means of escape without passing through a lockable door not under their control.
Gates serving the means of egress system shall comply with the requirements of this section. Gates used as a component in a means of egress shall conform to the applicable requirements for doors.
Horizontal sliding or swinging gates exceeding the 4-foot (1219 mm) maximum leaf width limitation are permitted in fences and walls surrounding a stadium.
Panic hardware is not required on gates surrounding stadiums where such gates are under constant immediate supervision while the public is present, and where safe dispersal areas based on 3 square feet (0.28 m2) per occupant are located between the fence and enclosed space. Such required safe dispersal areas shall not be located less than 50 feet (15 240 mm) from the enclosed space. See Section 1028.5 for means of egress from safe dispersal areas.
Turnstiles or similar devices that restrict travel to one direction shall not be placed so as to obstruct any required means of egress, except where permitted in accordance with Sections 1010.5.1, 1010.5.2 and 1010.5.3.
Each turnstile or similar device shall be credited with a capacity based on not more than a 50-person occupant load where all of the following provisions are met:
Where located as part of an accessible route, turnstiles shall have not less than 36 inches (914 mm) clear at and below a height of 34 inches (864 mm), not less than 32 inches (813 mm) clear width between 34 inches (864 mm) and 80 inches (2032 mm) and shall consist of a mechanism other than a revolving device.
Security access turnstiles that inhibit travel in the direction of egress utilizing a physical barrier shall be permitted to be considered as a component of the means of egress, provided that all of the following criteria are met:
Turnstiles more than 39 inches (991 mm) high shall meet the requirements for revolving doors or the requirements of Section 1010.5.2 for security access turnstiles.
Where serving an occupant load greater than 300, each turnstile that is not portable shall have a side-hinged swinging door that conforms to Section 1010.1 within 50 feet (15 240 mm).
Exception: A side-hinged swinging door is not required at security access turnstiles that comply with Section 1010.5.2.
DOORS, GATES AND TURNSTILES – FLORIDA BUILDING CODE 7TH EDITION (2020)
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]]>Guards shall comply with the provisions of Sections 1015.2 through 1015.7. Operable windows with sills located more than 72 inches (1829 mm) above finished grade or other surface below shall comply with Section 1015.8.
Guards shall be located along open-sided walking surfaces, including mezzanines, equipment platforms, aisles, stairs, ramps and landings that are located more than 30 inches (762 mm) measured vertically to the floor or grade below at any point within 36 inches (914 mm) horizontally to the edge of the open side. Guards shall be adequate in strength and attachment in accordance with Section 1607.9.
Exception: Guards are not required for the following locations:
Where glass is used to provide a guard or as a portion of the guard system, the guard shall comply with Section 2407. Where the glazing provided does not meet the strength and attachment requirements of Section 1607.9, complying guards shall be located along glazed sides of open-sided walking surfaces.
Required guards shall be not less than 42 inches (1067 mm) high, measured vertically as follows:
Required guards shall not have openings that allow passage of a sphere 4 inches (102 mm) in diameter from the walking surface to the required guard height.
Porches and decks that are enclosed with insect screening shall be provided with guards where the walking surface is located more than 30 inches (762 mm) above the floor or grade below.
Guards shall be provided where various components that require service are located within 10 feet (3048 mm) of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches (762 mm) above the floor, roof or grade below. The guard shall extend not less than 30 inches (762 mm) beyond each end of such components. The guard shall be constructed so as to prevent the passage of a sphere 21 inches (533 mm) in diameter.
Guards are not required where permanent fall arrest/restraint anchorage connector devices that comply with ANSI/ASSE Z359.1 are affixed for use during the entire roof covering lifetime. The devices shall be reevaluated for possible replacement when the entire roof covering is replaced. The devices shall be placed not more than 10 feet (3048 mm) on center along hip and ridge lines and placed not less than 10 feet (3048 mm) from the roof edge or open side of the walking surface.
Guards shall be provided where the roof hatch opening is located within 10 feet (3048 mm) of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches (762 mm) above the floor, roof or grade below. The guard shall be constructed so as to prevent the passage of a sphere 21 inches (533 mm) in diameter.
Guards are not required where permanent fall arrest/restraint anchorage connector devices that comply with ANSI/ASSE Z359.1 are affixed for use during the entire roof covering lifetime. The devices shall be reevaluated for possible replacement when the entire roof covering is replaced. The devices shall be placed not more than 10 feet (3048 mm) on center along hip and ridge lines and placed not less than 10 feet (3048 mm) from the roof edge or open side of the walking surface.
Windows in Group R-2 and R-3 buildings including dwelling units, where the top of the sill of an operable window opening is located less than 36 inches (914 mm) above the finished floor and more than 72 inches (1829 mm) above the finished grade or other surface below on the exterior of the building, shall comply with one of the following:
Window opening control devices shall comply with ASTM F2090. The window opening control device, after operation to release the control device allowing the window to fully open, shall not reduce the minimum net clear opening area of the window unit to less than the area required by Section 1030.2.
GUARDS – FLORIDA BUILDING CODE 7TH EDITION (2020)
GUARDS – FLORIDA BUILDING CODE 6TH EDITION (2017)
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]]>Handrails serving flights of stairways, ramps, stepped aisles and ramped aisles shall be adequate in strength and attachment in accordance with Section 1607.9. Handrails required for flights of stairways by Section 1011.11 shall comply with Sections 1014.2 through 1014.9. Handrails required for ramps by Section 1012.8 shall comply with Sections 1014.2 through 1014.8. Handrails for stepped aisles and ramped aisles required by Section 1029.16 shall comply with Sections 1014.2 through 1014.8.
Handrail height, measured above stair tread nosings, or finish surface of ramp slope, shall be uniform, not less than 34 inches (864 mm) and not more than 38 inches (965 mm). Handrail height of alternating tread devices and ship’s ladders, measured above tread nosings, shall be uniform, not less than 30 inches (762 mm) and not more than 34 inches (864 mm).
Exceptions:
Required handrails shall comply with Section 1014.3.1 or shall provide equivalent graspability.
Exceptions:
Handrails with a circular cross section shall have an outside diameter of not less than 11/4 inches (32 mm) and not greater than 2 inches (51 mm). Where the handrail is not circular, it shall have a perimeter dimension of not less than 4 inches (102 mm) and not greater than 61/4 inches (160 mm) with a maximum cross-sectional dimension of 21/4 inches (57 mm) and minimum cross-sectional dimension of 1 inch (25 mm). Edges shall have a minimum radius of 0.01 inch (0.25 mm).
Handrails with a perimeter greater than 61/4 inches (160 mm) shall provide a graspable finger recess area on both sides of the profile. The finger recess shall begin within a distance of 3/4 inch (19 mm) measured vertically from the tallest portion of the profile and achieve a depth of not less than 5/16 inch (8 mm) within 7/8 inch (22 mm) below the widest portion of the profile. This required depth shall continue for not less than 3/8 inch (10 mm) to a level that is not less than 13/4 inches (45 mm) below the tallest portion of the profile. The width of the handrail above the recess shall be not less than 11/4 inches (32 mm) to not greater than 23/4 inches (70 mm). Edges shall have a minimum radius of 0.01 inch (0.25 mm).
Handrail gripping surfaces shall be continuous, without interruption by newel posts or other obstructions.
Exceptions:
Handrails shall not rotate within their fittings.
Handrails shall return to a wall, guard or the walking surface or shall be continuous to the handrail of an adjacent flight of stairs or ramp run. Where handrails are not continuous between flights, the handrails shall extend horizontally not less than 12 inches (305 mm) beyond the top riser and continue to slope for the depth of one tread beyond the bottom riser. At ramps where handrails are not continuous between runs, the handrails shall extend horizontally above the landing 12 inches (305 mm) minimum beyond the top and bottom of ramp runs. The extensions of handrails shall be in the same direction of the flights of stairs at stairways and the ramp runs at ramps.
Exceptions:
Clear space between a handrail and a wall or other surface shall be not less than 11/2 inches (38 mm). A handrail and a wall or other surface adjacent to the handrail shall be free of any sharp or abrasive elements.
On ramps and on ramped aisles that are part of an accessible route, the clear width between handrails shall be 36 inches (914 mm) minimum. Projections into the required width of aisles, stairways and ramps at each side shall not exceed 41/2 inches (114 mm) at or below the handrail height. Projections into the required width shall not be limited above the minimum headroom height required in Section 1011.3. Projections due to intermediate handrails shall not constitute a reduction in the egress width. Where a pair of intermediate handrails are provided within the stairway width without a walking surface between the pair of intermediate handrails and the distance between the pair of intermediate handrails is greater than 6 inches (152 mm), the available egress width shall be reduced by the distance between the closest edges of each such intermediate pair of handrails that is greater than 6 inches (152 mm).
Stairways shall have intermediate handrails located in such a manner that all portions of the stairway minimum width or required capacity are within 30 inches (762 mm) of a handrail. On monumental stairs, handrails shall be located along the most direct path of egress travel.
HANDRAILS – FLORIDA BUILDING CODE 7TH EDITION (2020)
HANDRAILS – FLORIDA BUILDING CODE 6TH EDITION (2017)
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]]>Actual wall thickness of extruded aluminum members shall be not less than 0.040 inch (1 mm).
Reserved.
Vinyl, tempered glass, and acrylic panels shall be removable. Removable panels shall be identified as removable by a decal. The identification decal shall essentially state “Removable panel SHALL be removed when wind speeds exceed 75 mph (34 m/s).” Decals shall be placed such that the decal is visible when the panel is installed.
Structural members supporting screened enclosures shall be designed for wind in both of two orthogonal directions using the pressures given in Table 2002.4. Each primary member shall also be designed for a 300 pound (1.33 kN) load applied vertically downward along any 1 foot (305 mm) of any member, not occurring simultaneously with wind load.
Exception: In addition to wind pressures, purlins shall also be designed for a 200 pound (0.89 kN) load applied vertically downward along any 1 foot (305 mm) of any member, not occurring simultaneously with wind load.
DESIGN WIND PRESSURES SCREENED ENCLOSURESa, b, f, g, h
(STRENGTH DESIGN OR LRFD ONLY)
| ULTIMATE DESIGN WIND SPEED VULT (MPH) | |||||||||||||||||||||
| 110 | 120 | 130 | 140 | 150 | 160 | 170 | |||||||||||||||
| Surface | Design Pressures by Exposure Category (psf) | ||||||||||||||||||||
| B | C | D | B | C | D | B | C | D | B | C | D | B | C | D | B | C | D | B | C | D | |
| Horizontal Pressures onWindward Surfacesd | 17 | 24 | 28 | 20 | 28 | 33 | 23 | 32 | 38 | 27 | 38 | 44 | 31 | 43 | 51 | 36 | 49 | 58 | 40 | 56 | 66 |
| Horizontal Pressures onLeeward Surfacesd | 13 | 18 | 21 | 15 | 22 | 26 | 20 | 26 | 31 | 21 | 29 | 34 | 22 | 34 | 40 | 25 | 39 | 46 | 29 | 44 | 52 |
| Vertical Pressures on ScreenSurfacesc | 4 | 7 | 8 | 6 | 8 | 9 | 6 | 9 | 11 | 8 | 11 | 12 | 9 | 12 | 14 | 10 | 14 | 16 | 11 | 15 | 18 |
| Vertical Pressures onSolid Surfacese | 17 | 24 | 29 | 21 | 29 | 34 | 24 | 34 | 40 | 28 | 39 | 46 | 32 | 45 | 53 | 36 | 51 | 60 | 41 | 58 | 68 |
For SI: 1 pound per square foot = 9.479 kN/m2.
NOTES:
HEIGHT ADJUSTMENT FACTORS
| MEAN ROOFHEIGHT | EXPOSURE | ||
| B | C | D | |
| 0–15 | 0.81 | 0.86 | 0.89 |
| 20 | 0.89 | 0.92 | 0.93 |
| 25 | 0.94 | 0.96 | 0.97 |
| 30 | 1 | 1 | 1 |
| 35 | 1.05 | 1.03 | 1.03 |
| 40 | 1.09 | 1.06 | 1.05 |
| 45 | 1.12 | 1.09 | 1.07 |
| 50 | 1.16 | 1.11 | 1.09 |
| 55 | 1.19 | 1.14 | 1.11 |
| 60 | 1.22 | 1.16 | 1.13 |
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]]>Glass used in a handrail, guardrail or guard section shall be laminated glass constructed of fully tempered or heat-strengthened glass and shall comply with Category II or CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1. Glazing in railing in-fill panels shall be of an approved safety glazing material that conforms to the provisions of Section 2406.1.1. For all glazing types, the minimum nominal thickness shall be 1/4 inch (6.4 mm).
Exception: Single fully tempered glass complying with Category II of CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1 shall be permitted to be used in handrails and guardrails where there is no walking surface beneath them or the walking surface is permanently protected from the risk of falling glass.
The panels and their support system shall be designed to withstand the loads specified in Section 1607.9 using a safety factor of four.
Guards with structural glass baluster panels shall be installed with an attached top rail or handrail. The top rail or handrail shall be supported by not fewer than three glass baluster panels, or shall be otherwise supported to remain in place should one glass baluster panel fail.
Exception: An attached top rail or handrail is not required where the glass baluster panels are laminated glass with two or more glass plies of equal thickness and of the same glass type. The panels shall be tested to remain in place as a barrier following impact or glass breakage in accordance with ASTM E2353.
Glazing materials shall not be installed in handrails or guards in parking garages except for pedestrian areas not exposed to impact from vehicles.
Glazing installed in in-fill panels or balusters in wind-borne debris regions shall comply with the following:
Glass installed in exterior railing in-fill panels or balusters shall be laminated glass complying with Category II of CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1.
When the top rail is supported by glass, the assembly shall be tested according to the impact requirements of Section 1609.1.2 (HVHZ shall comply with Section 1618.4.6.4). The top rail shall remain in place after impact.
Additional Resources
GLASS IN HANDRAILS AND GUARDS – FLORIDA BUILDING CODE 7TH EDITION (2020)
Using Glass Panels for Railing
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The concept and history of fences can be traced back to the earliest human settlements. Natural barriers like hedgerows, stone walls, and wooden palisades were used to delineate ownership and protect against threats. Some of the oldest known fences date back to the Neolithic period, approximately 10,000 years ago. Archaeological evidence suggests that early farmers in Mesopotamia, the Levant, and parts of Europe utilized simple post-and-beam fences to enclose their livestock and crops.
As human populations grew and communities became more organized, the need for more sophisticated fencing solutions became apparent. In ancient Egypt, large estates and royal compounds were often surrounded by mud brick or stone walls to assert the power and status of the landowner. The Great Wall of China, built in stages over centuries, is one of the most famous examples of an extensive defensive fortification system. Similarly, the Inca civilization in South America constructed impressive stone walls and terraces to demarcate the borders of their empire.
During the Middle Ages in Europe, fencing took on a more practical, utilitarian role. They built wooden palisades, hedgerows, and dry stone walls to enclose fields, pastures, and small settlements, providing both physical and symbolic barriers. The development of metal-working techniques also led to the introduction of iron and wrought-iron fencing, which became a status symbol for the wealthy classes.
As cities and towns grew in size and complexity, fences also evolved to meet the needs of urban environments. Wooden picket fences and iron railings became popular for delineating private property and public spaces. In the American colonies, colonists often used simple split-rail fences made from locally sourced timber to mark boundaries and contain livestock.
The Industrial Revolution of the 18th and 19th centuries brought about a significant transformation in fencing materials and construction methods. The mass production of steel and the invention of barbed wire in the 1870s revolutionized agricultural fencing, making it more affordable and effective for large-scale livestock operations. Wire fencing also became increasingly popular for residential and commercial applications, providing a more versatile and durable alternative to traditional wooden or iron fences.
The 20th century saw the development of even more advanced fencing technologies, such as chain-link, vinyl, and aluminum fencing. These materials offered greater flexibility, durability, and ease of installation, making them suitable for a wide range of uses, from security perimeters to decorative enclosures. The rise of suburban development in the mid-20th century also led to the widespread adoption of standardized fencing regulations and practices, further shaping the visual landscape of modern communities.
Throughout history, fencing has also served specialized purposes beyond simple property demarcation. Military fortifications, such as castles, citadels, and defensive walls, utilized fencing and barriers to protect against invaders and maintain strategic control over territories. The development of prisons and other correctional facilities also relied heavily on fencing and security measures to contain and control populations.
In the agricultural sector, fencing has played a crucial role in livestock management, crop protection, and erosion control. We have used fences to partition and manage grazing lands, prevent the spread of livestock diseases, and safeguard valuable crops from wildlife damage. In urban environments, fencing has been employed to enhance public safety, control access to sensitive areas, and create physical and psychological barriers between different land uses.
While fencing has primarily served functional purposes, it has also held significant aesthetic and symbolic value throughout history. Ornamental fencing, such as wrought-iron gates and decorative pickets, became a status symbol for the wealthy and a way to showcase the architectural styles of the time. In some cultures, fencing has also been imbued with spiritual or religious significance, serving as a physical representation of the boundaries between the sacred and the profane.
In recent decades, the aesthetic and environmental considerations of fencing have become increasingly important, with the growing popularity of “green” or “eco-friendly” fencing solutions that blend seamlessly with natural landscapes. The use of living fences, such as hedgerows and living willow walls, not only provides visual appeal but also offers ecological benefits like habitat creation and carbon sequestration.
As the world continues to evolve, the role and design of fencing will likely continue to adapt to the changing needs of society. Advancements in materials science, automation, and sustainable construction techniques may lead to the development of even more durable, efficient, and environmentally-friendly fencing solutions. Additionally, the integration of smart technologies, such as sensors and monitoring systems, could transform fencing into an integral component of comprehensive security and management systems.
Regardless of the specific materials or technologies used, fencing will undoubtedly remain a fundamental element of human civilization, serving as a physical and symbolic demarcation of our shared landscapes and our individual and collective identities. The rich history of fencing reflects the ingenuity, creativity, and practical needs of people around the world, and its continued evolution will shape the way we interact with and define our environment in the years to come.
Here is a list of websites with information on fences and barriers:
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