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Baluster Spacing & Opening Requirements for balcony guardrail

Balusters (vertical posts comprising the barrier in guards and railings)

Baluster opening between vertical members (maximum sphere passage <= 4 3/8″)

Baluster opening in triangular area below guard bottom rail and stair tread (maximum sphere passage <= 6″)

Hand-railing heights are given:

U.S. handrails for stairs with one side against a wall: 30-38″

U.S. handrails at open stairs: 34-38″ above the stairs

Canadian stair handrails: 32-36″ above the stairs

Wall clearance: Handrails along a wall must have at least 1.5″ of clearance between the inside surface of the rail and the wall surface.

Railings should not project into the required width of the stairway by more than 4.5″ at or below the handrail height above the stairs.

Floor clearance: OPINION: we recommend either 4″ between bottom surface of the guardrail or stair rail bottom and the top of the floor surface, or use 2″ or less to avoid a foot trap.

balcony guardrail