Zero #368, Automatic Door Bottom, Heavy Duty Semi-Mortised, Double Neoprene, .562" Drop
This Zero International #368, Semi-Mortised, Heavy Duty, High Sound Automatic Door Bottom with a double solid neoprene seal offers the best sound control for high sound levels and will prevent infiltration of light, drafts and more. Made with high-quality mechanism that has been tested to 5 million opening and closings. Sound, Smoke and Fire-Rated and is available in various anodized finishes. Length is custom cut to size.
View more details in description tab below.
How to Order: Selecting Finish and Exact Size required will give you your total price. Note, product is priced per range with 18.25"-36" being the lowest priced range. Need help to determine sizing, see How To Measure For An Automatic Door Bottom.
This Zero International #368, Semi-Mortised, Heavy Duty, High Sound Automatic Door Bottom with a double solid neoprene seal offers the best sound control for high sound levels and will prevent infiltration of light, drafts and more. Made with high-quality mechanism that has been tested to 5 million opening and closings.
Installation: Casing is Semi-Mortised applied to the face of the door. Installation instructions and screws included. Screws are colored to coordinate with casing.
Please note, images are for illustrative purposes only. They are not actual photos. Therefore, actual colors may vary slightly and size many be enlarged to show detail. See product specs for exact measurements.
This product has a 1 year guarantee against defects in material and workmanship.
Click to view our Full Warranty Policy.
For a surface mounted option, see our Zero International #2673 High Sound Surface Mounted Automatic Door Bottom
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QuickShipNo
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ManufacturerZero International
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MPN368
- Product Design
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Seal TypeNeoprene Rubber Seal
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Mounting TypeSemi-Mortised
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Door TypeWooden Door
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- Dimensions
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Casing DimensionsCasing measures 1.901" by .916". Made of .093" thick aluminum.
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LengthCustom Cut to Size
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Drop SizeUp to 1" Drop
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- Installation
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HandingNon-Handed
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Installation ScrewsInstallation Screws Provided
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SizingTo determine sizing required see 'How to Size an Automatic Door Bottom'
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- Finishes
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FinishClear Anodized Aluminum (US28), Dark Bronze Anodized Aluminum (313), Gold Anodized Aluminum, Flat Black (US19)
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- Compliance Details
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Compliance DetailsFire Rated, BHMA Certified
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ANSI DesignationR3B3441
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Warranty1 Year Limited Warranty
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Click here for a Printable Copy of How to Install an Automatic Door Bottom.
Automatic Door Bottoms are available with three mounting options: Surface Mounted, Semi-Mortised and Fully Mortised. A surface mounted application can be applied without removing the door from its hinges. For a semi-mortised, if the rabbet in the door is cut-out already, the door does not need to be removed. For a fully mortised application the door should be removed before starting. |
STEP 1: SIZING YOUR DOOR BOTTOM Once your door is ready for installation you need to determine the size required for your door bottom:
For visual presentation see How to Measure for an Automatic Door Bottom. |
Once you have determined the size needed, if necessary, trim your door bottom. Use a chop saw or table saw to create a perfectly straight cut. Note, Only trim opposite the actuating plunger, brass nut. (Trimming from the brass nut side will ruin your ADB).
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You can trim from the edge up to one inch of the screw in the side wall of the ADB. |
STEP 2: PREP FOR ATTACHING AUTOMATIC DOOR BOTTOM Surface Mounted and Semi-Mortised models need to be applied to the push side of the door only (the side with the door stops). The actuating plunger needs to be applied to the hinge side of the door for all applications. Place the automatic door bottom against the door Once you have the automatic door bottom leveled and positioned correctly, with a pencil or marker mark where the attachment screws need to be drilled. |
STEP 3: ATTACHING THE AUTOMATIC DOOR BOTTOM To make installation easier you can drill a pilot hole which will ensure you attach the door bottom to the correctly marked spot. With the screws provided, screw in the automatic door bottom. In some models, a plate is provided for the hinge side of the frame. This will protect the door frame from getting worn down by the actuating plunger. If provided, attach to corresponding point on the frame. |
STEP 4: TESTING YOUR AUTOMATIC DOOR BOTTOM Now that the door bottom is attached, test the door bottom by opening and closing the door to ensure there is a full seal. If the seal does not come down far enough twist the brass nut out, if it seals too tight twist the brass nut in. |
Once you have followed through with all the instructions your Automatic Door Bottom is good to go! Enjoy years of quality sound, draft and light infiltration control with your new door bottom.
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Automatic Door Bottoms utilize a concealed flat spring mechanism and plunger. When the door is closed, a brass plunger is compressed to automatically lower the seal, starting from the hinge side first. This motion ensures a smooth usage even on an uneven surface and prevents drag. The seal is automatically raised upon opening. These automatic door bottoms have been successfully tested through 5 million cycles!
See also About Automatic Door Bottoms.