Norton Rixson 51 Series Shallo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,038.82
$1,244.24
Norton Rixson 51 Series Shallow Depth Floor Closer with 3/4" Offset Hung Configuration

Norton Rixson 51 Series Shallow Depth Floor Closer with 3/4" Offset Hung Configuration

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Model: 5103-NBC-LAP-LH

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,038.82
$1,244.24
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Norton Rixson 51 Series Shallow Depth Floor Closer with 3/4" Offset Hung Configuration

Professional Concealed Floor Closer for Limited Depth Applications

The Norton Rixson 51 Series Shallow Depth Floor Closer delivers full-strength door control performance in installations with restricted floor depth. This 3/4" offset hung closer supports doors up to 300 lb and 4'0" width while maintaining the same reliability as standard-depth models. Constructed with a heavy-duty cast iron body and stainless steel internal components, this ANSI/BHMA A156.4 Grade 1 certified closer provides concealed installation with clean architectural appearance.

Professional Features & Benefits

  • Shallow Depth Design: Engineered for installations with limited floor depth while retaining full closer functionality and durability for space-constrained projects.
  • Heavy-Duty Load Capacity: Supports doors up to 300 lb (136 kg) and maximum width of 4'0" (1219 mm) for demanding commercial applications.
  • 3/4" Offset Hung Configuration: Provides stable, precise door alignment and balanced swing for heavy-duty commercial doors with optimal weight distribution.
  • Precision Adjustable Controls: Features independent adjustments for closing speed, latch speed, and backcheck for smooth, controlled operation tailored to specific requirements.
  • Heavy-Duty Cast Iron Construction: Built with cast iron body and stainless steel internal components for long-term reliability and strength in high-traffic environments.
  • Concealed Installation Design: Floor-mounted, hidden design ensures clean architectural finish with minimal visual impact while transferring door weight directly to floor.
  • ANSI/BHMA Grade 1 Certification: ANSI/BHMA A156.4 Grade 1 certified with ADA-compliant options available for code compliance and accessibility requirements.
  • Versatile Finish Options: Available in 626 (Satin Chrome), 630 (Satin Stainless), 613 (Oil-Rubbed Bronze), and other architectural finishes to complement any design environment.

Technical Specifications

  • ANSI/BHMA: ANSI/BHMA A156.4, Grade 1
  • Commercial/Residential: Commercial
  • Cover Type: Cast iron cement case
  • Department: Door Hardware
  • Door Swing: Single Acting
  • Duty Level: Heavy Duty
  • Hold Open Feature: No
  • Product Group: Door Controls
  • Product Subgroup: Door Closers - Floor
  • Product Type: Floor Door Closers
  • Subcategory: Specialty Closers

Installation & Operation

  1. Review manufacturer specifications and verify floor preparation requirements including shallow recess depth, door thickness, and handing as applicable to this offset hung configuration.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on floor surface and door frame preparation points.
  3. Prepare floor by creating shallow recess per manufacturer specifications and drilling required holes for mounting hardware and pivot points.
  4. Install cast iron cement case in floor recess and secure the closer mechanism to floor and door per manufacturer torque specifications.
  5. Adjust operational components including closing speed, latch speed, and backcheck for proper alignment and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings with Limited Floor Depth
  • Educational Facilities with Shallow Slab Construction
  • Healthcare Institutions Requiring Concealed Hardware
  • Retail Establishments with Architectural Design Constraints
  • Industrial and Warehouse Facilities with Space Limitations
  • Multi-Tenant Residential Properties with Restricted Floor Access
  • Government and Municipal Buildings with Specialized Construction Requirements

Why Choose Norton Rixson Quality?

Norton Rixson 51 Series floor closers deliver professional-grade reliability with heavy-duty cast iron construction and stainless steel internal components rated for doors up to 300 lb capacity. ANSI/BHMA A156.4 Grade 1 certification ensures compliance with commercial building standards. Engineered for demanding commercial applications where dependable performance and space efficiency are essential, while maintaining clean architectural appearance through concealed installation design.

Manufacturer Resources

Product Specs

Subcategory:
Floor Closers
Door Swing:
Single Acting
ANSI/BHMA:
ANSI/BHMA A156.4, Grade 1
Product Group:
Door Controls
Product Subgroup:
Door Closers - Floor
Product Type:
Floor Door Closers
Duty Level:
Heavy Duty
Commercial/Residential:
Commercial
Cover Type:
Cast iron cement case
Hold Open Feature:
No
Department:
Door Hardware
Product Category:
Door Controls

Norton Rixson 5103-NBC-LAP-LH – Frequently Asked Questions

1) What does 3/4 inch offset hung mean on a Rixson floor closer, and is it the same as center hung?
Offset hung means the pivot point sits 3/4 inch in from the face of the door rather than on the door's centerline. The door swings from a point near the hinge edge, so it opens in one direction only, and the frame and floor prep are laid out to that 3/4 inch offset. Center hung pivots on the centerline and lets a door swing both ways. The 51 Series is built as a single acting closer in the 3/4 inch offset configuration, so it is not a substitute for a center hung double acting setup, and the floor case location differs between the two. Get the offset confirmed before the slab is cut.
2) Is the Rixson 51 Series floor closer ANSI Grade 1, and does it meet ADA opening force?
Certified to ANSI/BHMA A156.4 Grade 1, which is the top durability tier for door controls and what most institutional and government specs call for on an entrance. ADA compliant options are available in the series, which matters because ADA opening force is a matter of how the closer is specified and adjusted, not a blanket property of the body. If the opening is on an accessible route, call out the ADA requirement on the order so the correct spring configuration goes in.
3) Do I need to order a left hand and a right hand floor closer for a pair of doors?
Yes, handing has to be specified. The 51 Series in this configuration is a single acting offset hung closer and is built handed, currently offered as a left hand unit. A pair of doors swinging in opposite directions needs the matching hand for each leaf. Determine handing standing outside the opening on the secure side: if the hinges are on your left and the door swings away from you, it is left hand. Order the wrong hand and the closer will not mount correctly in the prep.
4) I need a floor closer that holds the door open. Can I use the Norton Rixson 51 Series or the Dorma BTS75V?
Neither one. The Norton Rixson 51 Series has no hold open feature, and the Dorma BTS75V is a non hold open closer as well. If the opening needs to stand open, specify a hold open model from the same family rather than adapting either of these; both are built to close the door under control every cycle, with the 51 Series offering independent closing speed, latch speed, and backcheck adjustment.
5) What adjustments does a Rixson 51 floor closer have if the door slams or does not latch?
Three independent adjustments: closing speed, latch speed, and backcheck. Closing speed governs the main sweep, latch speed handles the last few degrees so the door pulls into the strike without banging, and backcheck cushions the door when someone throws it open into a wall. A door that slams is usually latch speed set too fast; a door that stalls short of the strike is usually latch speed too slow or a stiff weatherstrip. All three are set at the closer after installation, so a complaint call is normally an adjustment, not a replacement.
6) Should I use a floor closer or a surface mounted overhead closer on a glass front entrance?
A floor closer is the choice when you want nothing visible on the door or the head. The 51 Series mounts in the floor and carries the door's weight straight into the slab, which is why it suits heavy entrance doors and storefronts where the leaf hangs on pivots rather than hinges. The tradeoff is the floor: it takes a recess cut and a cement case, so it is a build decision, not a retrofit you make on a Friday afternoon. An overhead surface closer is faster and cheaper to install and is the right call on an existing hollow metal or wood door with butt hinges and a finished floor you do not want to cut.
7) Our facility standard is a Grade 1 floor closer. Do the Norton Rixson 51 Series and the Dorma BTS75V both meet that?
Yes. The Norton Rixson 51 Series is certified to ANSI/BHMA A156.4 Grade 1 and is a commercial heavy duty product, and the Dorma BTS75V is listed as Grade 1. For standardizing across a facility, the practical separator is configuration rather than grade: the 51 Series is a single acting 3/4 inch offset hung closer engineered for shallow floor depth, so it suits slabs that cannot take a full depth case.
8) What finishes does the Norton Rixson 51 Series floor closer come in?
The exposed cover plate is offered in 626 satin chrome, 630 satin stainless, and 613 oil rubbed bronze, among other architectural finishes. On a floor closer the finish only affects the top plate you walk over, since the body and cement case are buried in the slab. Satin stainless 630 is the usual pick on a commercial entrance because it hides scuffing from foot traffic better than a polished finish.
9) Will a cast iron floor closer hold up in a lobby that sees constant traffic and floor mopping?
The body is cast iron with stainless steel internals, and it sits inside a cast iron cement case in the slab, which is the construction that survives high traffic openings and the water that gets pushed around a lobby floor. It carries a heavy duty rating and ANSI/BHMA A156.4 Grade 1 certification. For a property manager standardizing across a portfolio, that combination is what separates an entrance closer from a light commercial one.
How fast can I get the Norton Rixson 5103-NBC-LAP-LH delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Norton Rixson 5103-NBC-LAP-LH come with a warranty?
Absolutely. The Norton Rixson 5103-NBC-LAP-LH is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Norton Rixson 5103-NBC-LAP-LH?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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