How many exterior steps require a handrail?

Thursday, January 9, 2020

The building code is the same for both interior and exterior steps: a handrail is required for 4 or more risers (3 treads). Here’s the citation in the Residential Edition of the Florida Building Code (FBC), and the International Residential Code (IRC) is the same:

     This is a summary of the other handrail requirements found at R311.7.8:

• Handrail height must be 34 to 38 inches high, measured from the tread nosing or ramp surface, with two exceptions allowed: 1) a volute (shown below) is allowed over the lowest tread, and 2) the transition from handrail to guard, or at the start of a stair flight, my exceed 38 inches.

• Handrail should be continuous for the full length of the stair flight, from above the highest riser to above the lowest riser, but can be interrupted by a newel post.

• Handrails ends should be returned to the wall or terminate at newel post or safety terminal. The handrail shown at the top of the page is an example of one that is not terminated properly and the end sticking out could snag a handbag, causing a fall.

• Handrails next to a wall must have a minimum of 1.5 inches between wall and handrail.

• A round handrail diameter must be between 1.25 and 2 inches. If handrail is not round, the perimeter should be between 4 and 6.25 inches, and have edges slightly rounded with a diameter of at least 1/100th of an inch. 

• Handrails with a perimeter of more than 6.25 inches must have a finger-grippable recess on both sides. The requirements for the shape and recess are very specific: "The finger recess shall begin within a distance of 3/4 inch (19mm) 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 depth shall continue for not less than 3/8 inch (10mm) to a level that is not less than 1-3/4 inches (45mm) below the tallest portion of the profile. The width of the handrail above the recess shall be not less than 1-1/4 inches (32 mm) and not more than 2 3/4 inches (70 mm). Edges shall have a radius of not less than 0.01 inch (0.25 mm)."

     Here’s some examples of both acceptable and rejected handrail profiles from the folks at Code Check®. 

    When the steps are more than 30 inches above ground there must also be a guardrail. See our blog post What is the difference between a handrail and a guardrail? 

    And, finally, this is an example of the wrong way to do a handrail.

• • • • • • • • • • • • • • • • • • • • • • • • • 

Here’s links to a collection of our other blog posts about STAIRS:

What is the minimum headroom clearance for stairs?

Is a landing always required at the top and bottom of stairs? 

When is a railing required at stairs?

What is the building code for the minimum height of stair steps (risers)? 

When is a nosing required on a stair tread?

What is the building code requirement for receptacle outlets at stairs and stair landings?  

Are open stair risers acceptable?

What is the steepest residential stair allowed?

Why is a single step dangerous in a house?

 Do I need stairs at all exit doors from a mobile home? 

The stairs feel too steep. What's the building code? 

• What do home inspectors check when inspecting stairs?

• What is the longest stair run allowed? 

• What is the lighting requirement for stairs?

• A light is required over a stair after how many steps/risers? 

• When is safety glass required for windows at stairs and stair landings?

• What is the difference between a handrail and a guardrail? 

    Visit our STAIRS page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

site-built, mobile/manfuactured and modular homes






Air Conditioner & Furnace Age/Size



Aging in Place


Click Below  

for Links

to Collections

of Blog Posts

by Subject


Doors and Windows


Energy Efficiency

Fireplaces and Chimneys

Heating and Air Conditioning

Home Inspection

Hurricane Resistance

Electrical Receptacle Outlets

Electrical Panels

Garages and Carports

Common Problems

Exterior Walls & Structures



Life Expectancy

Mobile/Manufactured Homes

Older and Historic Houses

Mold, Lead & Other Contaminants

Modular Homes

Metal Roofs



Pool and Spa

Roof and Attic




"Should I Buy A..."


Termites, Wood Rot & Pests

Structure and Rooms


Water Heaters

Water Heater Age

Septic Tank Systems

Plumbing Pipes


When It First Became Code

Park Model Homes

Shingle Roofs


Wind Mitigation Form

"Does A Home


"What Is The Difference Between..."


Concrete and Concrete Block


Rain Gutters


Crawl Spaces

Building Permits

Clay Soil




HUD-Code for Mobile Homes

Flat Roofs

Sprinkler Systems

4-Point Inspections

Frequently Asked Questions (FAQ)

Building Codes

Inspector Licensing

& Standards

Washers and Dryers



Electrical Wiring

Plumbing Drains and Traps

Smoke & CO Alarms

Top 5 results given instantly.

Click on magnifying glass

for all search results.