Introduction
Features
Performance
Selective Hold-Open (SHO) Factory-installed on 27 & 28 Series closers. Hold-open may be turned on/off. Automatic Hold-Open (AHO) Available on certain series closers with or without dead stop. Preset at factory for specific degree of hold-open. Degree of hold-open cannot be changed, nor can closer be made into non hold-open. Delayed Action (DA) Provided on barrier-free installations. Permits door to remain ajar (at 70°) for up to 30 seconds. Operates by separate valve and can be shut off if not needed. Not available on closers furnished with cold weather fluid, and not recommended for exterior applications because of weather factors. (27 & 28 series only) Physically Handicapped (PH) To comply with guidelines established in the American With Disabilities Act, lighter opening forces are met if closers are ordered with a PH prefix. If 5 pounds of opening on interior doors is needed, simply order PH. If 8.5# of force is needed, specify Prefix PH and suffix 8.5#. Be advised that lower opening forces mean lower closer forces. PH products should not be ordered for exterior doors or fire rated openings. Fire/Lifesafety openings take precedence over the convenience of ADA. Securing a building is also a major concern and a lighter closer may not be strong enough to secure a latch bolt in a strike. Use care when specifying PH products. Cold Weather Fluid (CWF) Should be considered in installations where ground temperature is constantly below +15°F.May be used in temperatures as low as -35°F. Sealed Closer (SC) Used where water contact may occur. Provides gasketing and a cover plate that are epoxied around the case with the closer inside.Not available for replacement closers unless cement case is also replaced. Fire Rated (F) Used on labeled fire door requiring steel base pivot. PH with 3 pounds of opening force may not be used on fire doors.
Product Description & Features
• No arm or top pivot provided • Patch fittings by others. Rixson will provide spindle configuration to fit – provide details when ordering • Built-in positive dead stop prevents door from swinging beyond the desired opening degree (specify 85, 90, 95 or 105°) • Separate and independent valves for closing speed, latch speed and backcheck • Delayed action available-prefix “DA” • Available non hold-open (NHO), automatic hold open (AHO) or selective hold open (SHO) at same degree as dead stop • Models available to meet ANSI A117.1 opening force requirements. Prefix “PH” • Cold weather fluid available-specify “CWF” (not available for closers with “DA”) • Sealed closer available-specify “SC” • Available with floor plate or threshold installation (floor plate shown) • Cycolac cement case • Not allowed for fire rated doors • Applied stop required
Technical Information
Download File
Which shows the height as 4-1/16"
and then following the Installation Instructions here:
you see the called out the depth of the preparation to be 4-1/2"
Therefore I understand the answer to the question to be 7/16" is the minimum concrete slab thickness requirement under the Rixson 328 Center Hung Floor Closer.
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