What is guardrail bridge?
Bridge railings are guardrail systems designed to prevent people or vehicles from falling off the bridge. They can be made of concrete or steel. Guardrails for bridges are located prominently to make the public stay alert and safe during their drive through bridges.
How high should a handrail be on a bridge?
The railing shall have a vertical height of 42 inches nominal from the upper surface of the top rail to the floor, platform, runway, or ramp. The intermediate rail shall be about halfway between the top rail and the floor, platform, runway, or ramp. A bottom rail (called a toeboard by OSHA) is recommended.
What are the rails on a bridge called?
Guard rail: A guard rail is a system used on the sides of bridges — and sometimes, the median — to keep people and vehicles from entering unsafe areas or falling off the edge.
Why do bridges have railings?
A bridge’s railing depends on various factors such as location, material, and purpose. The railing adds safety for pedestrians, aesthetics, and a custom touch to bridge construction.
What is a guard rail?
Definition of guardrail : a railing guarding usually against danger especially : a barrier placed along the edge of a highway at dangerous points.
What is bridge parapet?
A bridge parapet is a safety barrier that is installed on the edge of a bridge, retaining wall or similar structure with a vertical drop, providing protection for vehicles and pedestrians.
How do you design a bridge structure?
For designing safe bridge structures, the engineering design process includes the following steps: 1) developing a complete understanding of the problem, 2) determining potential bridge loads, 3) combining these loads to determine the highest potential load, and 4) computing mathematical relationships to determine the …
How thick is a guardrail?
The minimum thickness for guardrails, midrails and vertical members is 1/4 inch in diameter. The ends of top rails and midrails of a guardrail system must not extend past the final post.
What is the OSHA standard for guardrails?
OSHA states that guardrail must reach a height of 42 inches, plus or minus 3 inches, above the walking-working surface and withstand a force of 200 pounds at any point in a downward or outward direction. If the railing dips below 39 inches, due to the force, the railing is not OSHA compliant.
What is the standard height of a guardrail?
(a) A standard guardrail shall consist of top rail, midrail or equivalent protection, and posts, and shall have a vertical height within the range of 42 inches to 45 inches from the upper surface of the top rail to the floor, platform, runway, or ramp level.