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Cross-market term

Guard and handrail

The barrier that stops a person falling from a change in level, and the rail a person holds while using a stair. Separate elements with separate heights and separate loadings, whatever they are called.
  • 4Markets
  • NoSame thing everywhere
  • 4Calculators

What it is called, by market

One concept, four markets. Where a name means something else locally, the card says so rather than leaving you to find out on site.

  • United Kingdom

    Same word, different thing

    guarding

    also balustrade, handrail, barrier, edge protection, infill

    GUARDING is the regulatory word for the barrier and HANDRAIL for the grip, but BALUSTRADE is used in the trade for both together — which is where the two requirements get merged into one.

  • Australia

    Same word, different thing

    balustrade

    also barrier, handrail, guardrail, infill

    BALUSTRADE is the code's own word for the barrier here, with the handrail named separately, so the same word is a regulatory term in Australia and trade shorthand in Britain.

  • United Statesyours

    Same word, different thing

    guard

    also guardrail, handrail, baluster, top rail, graspable

    GUARD and HANDRAIL are distinct code elements at different heights, and a stair usually needs both. GRASPABLE is a defined shape requirement for the handrail, not a description.

  • Canada

    Same word, different thing

    guard

    also guardrail, handrail, balustrade, climbable

    As the United States, with the CLIMBABLE restriction on horizontal members in a guard written explicitly — a rule British guidance expresses through the sphere test instead.

The governing standard, by market

  • United Kingdom

    Approved Document K / BS 6180

    Protection from falling, collision and impact including guarding heights, and the code of practice for barriers in and about buildings with their design loads.

  • United States

    IRC R312 / IBC 1015

    Guards for residential construction including height and opening limitations, and the commercial guard requirements with loading and opening criteria.

Calculators for this

Each works in either measurement system, and the terminology on the page follows whichever market you have selected.

Guardrail System Fall-Protection Compliance Checker →Highway Guardrail Post Spacing Calculator →Handrail Length Calculator →Glass Balustrade Bending Stress Checker →

Frequently asked questions

What is the difference between a guard and a handrail?
What they are for, which sets everything else about them. A GUARD is a barrier at the edge of a drop: its job is to stop a person, a child or a pushed object going over, so it is specified by HEIGHT above the walking surface, by the size of gap it may contain, and by a horizontal load it must resist along its top. A HANDRAIL is something to hold: its job is to steady a person and arrest a slip on a stair, so it is specified by a graspable cross-section, a height that suits a hand rather than a body, continuity along the flight, and often an extension past the top and bottom step. A stair beside a drop usually needs both, and they are at different heights — which is why an American stair often shows a low handrail mounted on the posts of a taller guard, a detail that looks redundant to anyone who thinks of the whole thing as one balustrade.
Why is a horizontal rail a problem?
Because a child climbs it, and the guard's height is measured from the floor rather than from the last thing a child can stand on. A guard made of horizontal rails is a ladder: a toddler can reach the top rail of a compliant guard in a few seconds, and the effective height of the barrier becomes the distance from the highest foothold to the top, which may be a fraction of what the drawing says. Canadian and American codes address this directly by restricting climbable members within a defined zone of the guard. British guidance reaches the same place from a different direction: it requires that guarding in a building where children under five may be present should not be readily climbable, and applies the sphere test — no gap that a 100 mm sphere can pass — to the openings. The design consequence is the same in all three: vertical infill, glass, mesh or solid panels, and horizontal rails only where the building will not have small children in it.
What does the load on a guard actually represent?
A crowd leaning, not a person tripping — and that is why the figure varies so much with the building's use. A barrier is designed for a horizontal line load applied along its top, and the value depends on what is behind it: a domestic stair carries a small figure because the worst realistic case is one person losing balance, while a grandstand, a balcony at an assembly building or a barrier at the front of a queue carries a figure several times larger, because the design case is many people pressing. There is usually also a separate uniformly distributed load on the infill and a point load, since a guard can fail by a panel giving way rather than by the whole assembly moving. The practical consequences are two: the guard's load case comes from the OCCUPANCY rather than from the height of the drop, and the fixing at the base is almost always the governing detail, because a line load at the top of a post is a large moment at its foot.