Zero International

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Automatic Door Bottoms

Finish:

Engineered for easy installation and superior sealing performance.

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Overview

From ease of installation to hassle-free performance, the patented technology in ZERO automatic door bottoms deliver superior results.

They ensure an efficient seal with an adjustable plunger that is compressed against the frame as the door is closed, activating a concealed flat spring mechanism. This mechanism drops the seal smoothly from the housing in a scissor-like motion. The seal compresses on either even or uneven surfaces and retracts automatically when the door is opened.

Automatic Door Bottoms serve many important functions, including blocking penetration by:

Sound
Air
Smoke
Flames

Features & Benefits

A variety of types of automatic door bottoms are available to accommodate the specific needs of your application. Our special-purpose door bottoms give optimal results to help meet the biggest challenges in sealing door perimeters:

High-level sound control achieved with unique, patented design features
Blocking fire, smoke and toxic gases with integral intumescent material
Minimizing door-opening force with "Light Spring" action to meet ADA access requirements

Specifications

ZERO automatic door bottoms meet the highest standards in the industry for reliability and performance. See the catalog for specific certification by model number. They include certifications for:

Fire Rating
Smoke and Draft Control
Air Infiltration
Sound

Types

See catalog for dimensions, drawings, available options and certifications for each part number.

Heavy duty automatic door bottoms: For high use and abuse applications, primarily in institutional and commercial markets requiring the best acoustical performance.

Regular duty automatic door bottoms: For standard applications, primarily in commercial markets.

Light duty automatic door bottoms: For applications with lower abuse and traffic applications, primarily for use in multifamily markets or projects where cost is a concern.

Special purpose automatic door bottoms: Unique solutions including intumescent fire protection and applications with sliding doors.

Finishes

ZERO automatic door bottoms are available in the following finishes:

AA Clear anodized aluminum

Clear Anodized Aluminum Finish

BK Aluminum black anodized

Aluminum Black Anodized

D Aluminum dark bronze anodized

Aluminum Dark Bronze Anodized

G Aluminum gold anodized

Aluminum Gold Anodized

Options

Door bottoms are available in specialized versions for a variety of applications, including:

Light spring (LS)
This feature can be useful for reducing opening and closing force for use with ADA-compatible doors
Air flow/sound block (FLO)
This option uses sound-dampening silicone seals or nylon brush which are notched and overlapped in staggered rows for applications requiring air flow while blocking sound
Z49 End cap (Z49)
Easy-access end caps for mortised door bottoms provide easy access for cleaning, well suited for health care applications