Mind the Gap

Buildings aren't solid blocks - they're living structures that expand, contract, and move. Expansion joints let buildings breathe without cracking. In Miami-Dade hurricanes, these joints face extreme forces. Our engineers calculate exactly what your joint covers need to survive.

Calculate My Joints

Building Joint Movement Simulator

Thermal Expansion

0.0"

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2.0"

Thermal

Seismic

Wind

Three Forces That Move Buildings

Every building joint must handle thermal, seismic, and wind movement. In Miami-Dade, wind dominates the design.

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Thermal Movement

Buildings expand when hot and shrink when cold. A 200-foot building in Miami can grow almost 1 inch on a hot summer day.

Movement Rate 0.5"/100ft

Daily Cycle Constant

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Seismic Movement

Rare in Florida, but building codes still require consideration. Joints allow building sections to move independently during ground shaking.

FL Seismic Zone Low

Design Drift 0.5-1%

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Wind Movement

Hurricane winds push buildings sideways. Different sections move at different rates. Joints must flex while staying watertight at 180+ mph.

Miami-Dade Wind 180+ mph

Joint Pressure 72 PSF

Joint Width Calculator

Estimate the minimum expansion joint width for your building

Calculate Required Joint Width

Building Length (feet)

Number of Floors

Structure Type

Wind Zone

Recommended Joint Width

2.0

inches minimum

Frequently Asked Questions

Common questions about expansion joints in Miami-Dade

Expansion joints move due to three main forces: thermal expansion (buildings expand in heat, contract in cold), seismic activity (rare in Florida but codes require consideration), and wind pressure (hurricanes can push building sections in different directions). Miami-Dade requires joints to handle up to 4 inches of movement in some cases.

Joint width depends on building length and temperature range. For Miami-Dade, typical joints are 2-4 inches wide for buildings over 200 feet. The joint must accommodate thermal movement (about 0.5 inch per 100 feet), plus seismic and wind allowances. Our calculations determine exact width needed.

Yes! In Miami-Dade HVHZ, expansion joint covers must be engineered for 180+ mph wind speeds. Covers can experience both positive pressure (pushed down) and negative pressure (sucked up). PE-stamped calculations ensure covers stay attached and watertight during hurricanes.

Failed expansion joints cause water intrusion, structural damage, and can compromise building envelope. Water entering through joints can damage multiple floors, destroy equipment, and create mold issues. Proper engineering prevents these costly failures.