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Lead Lined Control Window

Ray-Bar Lead Lined View Windows

  • Over 48+ standard modular profile sizes fitting new or existing walls from 4-1/2" and up to 8" thick
  • Includes X-Ray Glass or Impact Resistant X-Ray Safety Glass factory set into our adjustable radiation shielded frame
  • Easily installs literally as a modular assembly in only minutes
  • Numerous protective shielding levels available to meet your projects radiation protection requirements.
  • Available with Impact Resistant X-Ray Safety Glass to meet building code required glazing safety standards
  • Alternate Materials: Brushed Stainless Steel or Grained Aluminum (Typically in only 10-15 working business days)
  • In Stock Frames are Galvanized Steel with Primer Finish ready for paint
  • Specialty Options: Splayed, Bottom Voice Passage, Powder Coated, Slanted, Staggered/Offset, or Vertical Mullions for Multiple Panes
  • Available crated, ready to ship typically in only 2 to 10 business working days. (Excluding weekends and Holidays and transit times)

Ray-Bar's Telescopic X-Ray Control View Window Frames are internally shielded to properly provide x-ray protection from Alpha, Beta and Gamma Ionizing radiation for meeting National NCRP and International ICRP safety code compliant shielding of medical diagnostic imaging and radiation therapy procedures.

Ray-Bar Lead Lined Telescopic View Windows are manufactured for ease of installation in rough opening after Ray Bar Lead Backed Drywall is installed, with over 48+ standard profile and sizes “good in stock”.

Designed for use in medical shielding applications, our window frame assembly achieves an effective lead equivalency radiation shielding level of 5/64"
(2.0 mm) 5#, with X-Ray Protective Lead Glass factory set into each of our Ray-Bar Lead Lined Telescopic View Windows.
*Higher radiation shielding levels of our Control Window Frame and X-Ray Glass assemblies are available upon request

Standard frame construction is 16-gauge electro-galvanized and primer finished steel ("ready to paint"), but other finish options are available such as solid color powder-coated steel, solid color or metallic enamel painted, brushed stainless steel, grained aluminum, or anodized aluminum to integrate seamlessly into your design.

All of Ray-Bar’s various X-Ray Lead Glass products and Insulated Glass Units are available factory set into our frames prior to shipment.

All standard sizes are "ready to ship" typically in just 2 to 3 days. Custom sizes, radiation protection shielding levels, frame profiles and material options are available in only 10 to 15 business working days. (Excluding Holidays and weekends).

Please note that while Ray Bar Engineering does offer “in-stock” frames each order is custom to your shielding requirements. 


Ray-Bar proprietary lead lined telescopic view window frames are fabricated from 16-gauge electro-galvanized and primered steel providing a rust resistant, ready to paint surface, with internal lead lining providing 2.0mm / 5# lead shielding equivalency as standard. Higher shielding value ratings are available upon request.

  • Standard Ray-Bar X-Ray Lead Glass is 5/16" thick, providing 2.0 mm (5#) lead equivalent of shielding value.Ray-Bar Telescopic Steel View Control Window
  • Ray-Bar X-Ray Safety Glass is available upon request, labeled to meet impact resistance ANSI Z97.1 and CPSC 16 CFR 1201 Cat 2 and is required in any window within 24" of any door opening, per glazing safety codes and regulations. All x-ray windows should be located at least 38" above finish floor (or more), and utilized in interior applications only.
  • All x-ray windows should be located at least 38" above finish floor (or more), and typically utilized in interior applications. 
  • Please note: x-ray lead glass cannot be tempered as it is physically impossible due to its low melting temperature and surface characteristics. It will not survive the thermal tempering process or accept a chemical salt bath regardless of manufacturer; however x-ray lead glass is not required by any safety code to be "tempered". The good news is Ray-Bar X-Ray Safety Glass meets all current glass safety codes for impact resistance and is permanently labeled accordingly per ANSI Z97.1 and CPSC 16 CFR 1201 Cat 2 and IBC 2406 requirements for hazardous locations indoors, which is particularly applicable in a medical facility environment.
  • Standard Ray-Bar frame throat telescopes fit wall thickness from 4-1/4" to 8".
  • Other Glass Options are also available such as our Ray Bar Integral Mini Blind IGU in double or triple configurations, and fire rated options.


Our standard "in-stock" sizes available in 2 to 3 business days are:

8” x 10” 18” x 18” 24” x 36" 30" x 48" 36" x 84 " 48" x 48 "
10" x 10" 18" x 24” 24" x 42" 36" x 36 " 42" x 42 " 48" x 60 "
10” x 12”
12" x 12"
18” x 36”
18” x 42”
24" x 48" 36" x 42 " 42" x 48" 48" x 72 "
12" x 16" 20" x 20" 30" x 30" 36" x 48 " 42" x 60 " 48" x 84 "
12" x 24" 24" x 24" 30" x 36" 36" x 60 " 42" x 72 " 48" x 96 "
12" x 36" 24" x 30" 30" x 42 " 36" x 72 " 42" x 84 "  

Stock sizes are typically available "Ready To Ship" in only 2 to 3 days, with X-Ray Glass modularly factory installed and crated/boxed.

Custom sizes available in approximately 10 to 15 working days from date of order.

Higher lead equivalencies also available upon request.

Customer must order frame to match same shielding value in wall/partition that window occurs in.


Our standard lead lined telescopic frames are ordered by actual glass size and fit into rough opening of 1" larger than glass size to allow 1/2" clearance around perimeter of the frame. The outside dimensions of our standard frame are 3" larger than glass size on x-ray side and 4-1/2" larger than glass size on control side.

Example: A 12" X 12" telescopic frame will fit into a rough opening of 13 " X 13 " and will have an outside dimension of 15" on x-ray side and 16-1/4" outside dimension on control side.

Please note: Dimensions vary for telescopic view window frames with special options.


Ray Bar Engineering has designed our Telescopic Steel View Window Frame with the glass installer in mind. It installs in a fraction of the time that it takes to install traditional hollow metal frames without any specialty tools or any steep learning curve. Because of the Telescopic Design the frame is able to slip over the rough opening after the drywall is installed, eliminated the risk of the frame or glass being damaged by other trades coming after the window is installed, and allowing your wall construction, taping and finishing of the project to move forward and meeting today’s fast paced completion schedules without the need of waiting for a hollow metal frame to be installed first.

To install your window frame simply, remove the slip side of telescopic view window frame 2-piece assembly and install lead lined/lead glass portion on x-ray source side of rough opening. Install "Slip-Side" flange on control side of rough opening at same time and slide both pieces together tight to wall. Check to verify that frame is level and fasten with self-tapping pan head screws through the factory pre-drilled holes on flat flange portion. Always screw through both halves of frame, the factory set screw-holes are typically 6" on center (4 places minimum on a small frame). 

Special Frame Options

All custom Ray-Bar Telescopic frame options listed below are available independently or in various unique combinations with any of the listed options to meet your project requirements.

  • Ray-Bar Anti-Microbial Telescopic X-Ray Control View Window Frame
  • Ray-Bar Telescopic Steel View Control Window 
    • Ray-Bar's "Anti-Microbial" Telescopic X-Ray Control Window Frame is internally shielded to properly provide x-ray protection from Alpha, Beta and Gamma Ionizing radiation for proper shielding of medical diagnostic imaging procedures.
    • Ray-Bar's frame is designed to overlap between the shielded wall partition and our factory set Ray-Bar "Easy-Clean" X-Ray Glass that is factory surface treated by Ray-Bar to inhibit bacterial adhesion, colonization and "bio-film" build ups.
    • Ray Bar’s Telescopic Steel View Window acts as a sealed modular unit that instantly adjusts to fit a large range of wall thicknesses from 4-1/4" to 8" and the assembly easily installs in 3 to 10 minutes with regular skills and common tools.
    • Protective level: 2.0 MM / 5# / 5/64" Pb shielding equivalency @ 150 kVp is minimum standard.
    • Additionally, Ray-Bar color coats our proprietary telescopic frame with a highly durable and corrosion resistant finish that includes a composite additive that homogeneously defends against the growth of micro-organisms such as bacteria, viruses, mildew, algae and fungi.
    • Ray-Bar's Anti-Microbial color-coating technology utilizes non-migratory, long term durable finish that promotes a broad-spectrum antimicrobial effectiveness with a slow-release silver ion exchange process that disrupts bacterial and resists microbes and the formation of bio-film.
  • Bottom Voice Passage Baffle: Allows better voice transmission and communication, through the bottom sill, between the x-ray technician and patient during medical imaging procedures. 

  • Lead Lined "Splayed" Telescopic Control View WindowRay-Bar Telescopic Steel View Splayed Control Window

  • 45 Degree "Splayed" Faces: Allows wider angle range of view into image room, particularly beneficial on smaller frame sizes or frames occurring in very thick walls.

  • Lead Lined Window with Vertical Mullions Vertical Center Mullions: Allows for extra wide control windows (up to 16'0") with 2 or more panes of X-Ray Glass with slim mullions for less obstruction of technicians view during imaging or other medical procedures. Provides additional structural support, and proper internal lead shielding overlaps as required per applicable NCRP codes. Fabricated with 16 gauge steel for additional overall frame strength. 

  • Ray-Bar Telescopic Steel View Control WindowSlanted/Angled/Sloped X-Ray Glass: Ray-Bar exclusive design lead lined telescopic control window frame profile securely sets X-Ray Lead Glass at a 1" overall vertical sloped angle reducing glass surface reflection and visual light refraction and providing a clearer view for the technician of the patient and imaging procedures. Frames available fabricated in 16ga. galvanized and primered steel, Solid Color Powder Coated, Brushed Aluminum or Brushed Stainless Steel.

  • Vertical "T" Joints: Allows larger width frames with a very narrow vertical shielded joint of approximately 1/2" between X-Ray Glass panes. This provides less vision obstruction in view area than a vertical center mullion; however, this does not provide any additional frame strength

  • Extra Thick Wall Frame Throats: Allows frame to adjust beyond the standard 7-1/2" wide wall, for extra thick stud or concrete walls available up to 24" thick or as per customer’s project conditions and requirements.

  • Heavy Lead-Lining: Heavier lead-lining beyond the standard 1/16" (1.6mm). Available in many thicknesses for higher energy shielding applications from 3/32" (2.4mm) to 1" (25.4mm), along with matching heavier X-Ray Glass lead equivalencies for proper shielding continuity and compliance. Heavier gauge steel construction may be required for additional structural support.

  • Thicker X-Ray Glass: Available for higher energy lead shielding equivalency requirements such as 3/32" (2.4mm) to 1" (25.4mm) or more with glass thicknesses of 1/2" to 5" total available. Also with matching frame lead-lining for proper shielding continuity and compliance. Heavier gauge steel construction may be required for additional structural support.

  • Heavier Gauge Steel Material Construction: Beyond our standard 16 gauge electro-galvanized steel, this heavy steel is available in 14 and 12 gauge "JetKote" or "Paint-Lock" Galvanized Steel.

  • Ray-Bar Telescopic Steel View Control Window AluminumLead Lined Telescopic Control View Window (Stainless Steel) Available in 16 gauge 304 Stainless Steel with a #4 brush grained finish. Utilized where low ferrous (iron-free) material conditions are required.

  • Aluminum Material Construction Available in .063" thick 5052-H32 aluminum with brush grained finish and also optionally available as clear anodized for added durability. Utilized where non-ferrous (iron-free) material conditions are preferred or required.

  • Ray-Bar Telescopic Steel View Control Window with Mini BlindsInternal Mini Blinds: Provides easy to use manual dial controlled privacy by tilting open and close mini blinds in a sealed, dust-free IGU assembly and assists in meeting Federal HIPAA privacy requirements.

  • Security Designs: Heavier gauge steel construction with abuse and impact resistant x-ray safety glass set in place with tamper resistant fasteners. Utilized in security and high risk applications such as jail or prison x-ray rooms.

  • Lead Lined Telescopic Control View Window (Powder Coated) Powder Coating Color Finishes: High quality powder coating finishes available in a large variety of colors offering convenience, durability and an aesthetically pleasing appearance option on any of our standard Ray-Bar telescopic window frames.Ray-Bar Telescopic Steel View Control Window Powder Coated

  • Enamel Painted Color Finishes: Semi-gloss enamel paint applied to all visible frame surfaces available in a wide variety of solid colors allows the ease and convenience of a fully retro-fit, ready to install, assembly as a completely finished x-ray control window system.


Specialty Color and Finish Options

Many specialty options are available for our window frame finishes including: Aluminum, stainless steel, "Alumicoat" powder coat, any solid color powder coat and multiple wood grain finishes

Ray-Bar Staggered Off-Set Split Glass Shielded Windows


Staggered Overlapping Glass

  • Offers excellent clear view without mullions or obstructions
  • Provides natural voice passage communication with patients
  • Allows clear view windows up to 14'0" wide
  • Perfect for CT Scan, PET Scan and Angiography rooms
  • Many protective shielding levels available
  • Optional Impact Resistant X-Ray Safety Glass
  • Available with Ray-Bar custom lead lined frames specially designed rabbets and multiple stops for staggered multi-pane-glass configurations

Ray-Bar manufactures custom "Staggered Off-Set Split Glass Window" designs that provide radiation shielding protection and eliminate the need for vertical mullions and T-Joints. This allows a clear view in larger size windows while providing the additional advantage of clear natural voice communications between the medical technician and patient during PET or CT imaging procedures. This unique design utilizes 2, 3, or 4 panes of overlapping X-Ray Glass (or safety glass) panels on the vertical sides. Contact us for additional technical design information.

Hollow Metal Lead Lined Welded Window Frames

  • Ray Bar EngineeRay Bar Hollow Metal Xray Control Window Framesring offers Hollow Metal Lead Lined Welded Window frames for fire-rated applications where a Fire-Rated X-ray Lead Glass Insulated Glass Unit is required.
  • Ray Bar can also provide Hollow Metal Frames when required due to specifications, or higher radiation lead shielding requirements.
  • Only offered if purchased with Ray-Bar X-Ray Lead Glass or X-Ray Safety Glass.
  • Available in single pane sizes from 8" x 8" and up to 48" x 96". Larger Sizes are also available with the use of vertical mullions.
  • Hollow Metal Welded Window Frames are 16 gauge primered steel with anchors for metal studs, wood studs or concrete "cast in place" or retro-fit bolt-anchor (Hilti) into existing concrete or masonry walls.
  • Equal rabbet or single step rabbet frame profiles can be formed to fit wall thicknesses from 5" up to 24"
  • Heavier 14 gauge or 12-gauge hollow metal frames available for structural support, larger windows or higher radiation lead shielding applications.
  • Welded Frames must be installed in place prior to any lead backed drywall.
  • Lead Lined Welded HM frames typically available in approximately 15 to 21 working days for faster lead times we recommend our Telescopic Steel View window frame.
  • Customer must order frames with same lead thickness as required and specified by the project radiation physicist in each wall or partition.
  • Customer must order frames internally lead lined on same side as radiation and properly install by the same orientation.
  • Available in 12 lead thickness levels of internal radiation shielding within frame throats.
  • Available Labeled as Fire Rated with Ceramic Fire-Resistant Glass or U.L. listed fire rated Insulated Glass Units "IGU" double or triple assemblies

Medical X-Ray Radiographic Diagnostic Imaging Control View Window Design Requirements per applicable National or International Radiation Safety Codes

National Council on Radiation Protection and Measurements: NCRP Report #49 requires under Radiographic Installations 5.3.2: "Provision shall be made for the operator to observe and communicate with the patient from a shielded position at the control panel. When an observation window is provided, it shall have a lead equivalence at least equal to that required of the partition (or the door) in which it is located."

The current American Institute of Architecture AIA and FGI Guidelines for Design and Construction of Health Care Facilities requires under Shielded Control Alcoves "Each x-ray room shall include a shielded control alcove. This area shall be provided with a view window designed to provide full view of the examination table and the patient at all times, including full view of the patient when the table is in the tilt position or the chest x-ray is in use."

NCRP Report #147 requires under Types of Medical X-Ray Imaging Facilities, Radiographic Installations 2.2.1: "The control booth shall have a control window or viewing device that allows the operator to view the patient during all x-ray exposures performed in the room. The operator must be able to view the wall bucky and x-ray table, as well as patients confined to stretchers. When an observation window is used, the window and frame shall provide the necessary attenuation required to reduce the air kerma to the shielding design goal. The window(s) should be at least 45 x 45cm (18" x 18") and centered 1.5m (60") above the finished floor."

* Please note the above uses of the word "shall" is a requirement, and use of the word "should" is a recommendation.

DOA Technical Manual TM 5-805-12 and DOD Unified Facilities Criteria UFC 3-190-03A "X-Ray Shielding" both state: "Leaded Glass: The leaded glass is a clear lead glass sheet approximately 1/4" inch thick and is installed in single or multiple thicknesses to provide a lead equivalent not less than that of the partition or door of which it is a part of".

International Council on Radiation Protection: ICRP Publication#44 "Protection of the Patient in Radiation Therapy"(33): "There must be a means for observing the patient continuously during treatment. This may be accomplished by use of a lead-glass window,"

International Atomic Energy Agency: IAEA Chapter 16 "Radiation Protection and Safety in Radiotherapy" 16.10: "Adequate systems, devices or other means should be provided to allow operator to have a clear and full view of the patient. The systems for patient observation should be redundant and independent (e.g. closed circuit television or lead windows, depending on type of treatment unit)".

*Please Note these important considerations:

All television or electronic camera systems require skilled maintenance and service, and have the potential of failing, having picture loss and component problems. An x-ray lead glass control window provides a continuous view of patient, equipment and room, and has no maintenance other than occasional cleaning.

Additional Safety Design Consideration

Per current International Building Codes (IBC) 2406 for Safety Glazing requirements and meeting American National Standards Institute ANSI Z.97.1 and Consumer Product Safety Commission CPSC 16 CFR 1201 Category I or Cat II (as applicable) standards, any x-ray control window occurring within 24" of a door opening, or any vision lite window occurring in a shielded door must have impact resistant X-Ray Safety Glass, and be permanently labeled as meeting these required impact resistant standards.

Please Note: X-Ray Lead Glass cannot be tempered as it is physically impossible due to its low melting temperature and surface characteristics as it will not survive the thermal tempering process or accept a chemical salt bath regardless of the manufacturer; however, X-Ray Lead Glass is NOT REQUIRED by any safety code to be "tempered". The good news is Ray-Bar X-Ray Safety Glass meets all current glass safety codes for impact resistance and is permanently labeled accordingly as per ANSI Z97.1 and CPSC 16 CFR 1201 Cat I or Cat II as applicable, and IBC 2406 Safety Glazing requirements for hazardous locations indoors and this is particularly applicable in a medical facility environment.

Click here for the Lead Thickness Chart.

Click here for the Powder Coat Color Chart.


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