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Classroom Technology Standards

The Classroom Technology standards document represents the latest standards for University Scheduled Classrooms on campus. This document is meant to be handed off to building architects, contractors, and individual departments when looking at standards, processes, and ideal room setups conducive to a great classroom experience for all users of the space (presenters, students, and technical support staff, custodial support staff) with the most weight put on the learner's experience.

CSI MasterFormat

Construction Standards Reference Section

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title1.02 Infrastructure Elements

A. Media Junction Box  

Intent

Centralized landing zone for all wiring, power, and connections required between a presenter's station and the wall which will be serviced by the campus data network, building AC power, data ports designated for audio-visual content and control transport, disconnect point for any ceiling speakers, and general disconnect point for any additional cabling needed to go out to the rest of the room and any AV rack(s).  

Specifications

Media Junction Box shall be wall recessed, flush with finished wall or finished floor. A typical size is 14” x  24” x  4”. The media box should be designed to fit between studs in the wall. Media box shall have a screw or locking cover door with flush locks and cable entry access to connection panels. Media Box shall be white or painted to match wall color. Media box shall contain AC power, networking, and media connection faceplates.  High voltA. age dividers must be used to separate AC power from low voltage signal areas. Media box shall have a minimum of (1) - 2” or (2) - 1.25” ‘home run conduits’ from the media box to the plenum  pull-box continuing 1.25” conduit to  display location as appropriate. Media box shall have a minimum of one (1) 1.25” conduit ‘home run’ to the nearest network cable tray.    

Specified Product(s)

Legrand EN2850 or Approved Equal  

Additional Details

Media box shall be serviced with: electrical, network, & Audio, Video and Control low-voltage connectivity (typical). Refer to Appendix for layout details. Refer to Installation Cable section below for cable details. Slanted-style Keystone faceplates are desired to mitigate bends in CAT6 a cables.  

1. Electrical  

  • 120  VAC, 20A [dedicated] service, 2 outlets   

2. Network Data, Video, Power-Over-Ethernet (POE IEEE 802.3bt)  

  • CAT6 UTP (Data)  

  • Shielded CAT6a (Video) HDBT certified.

  • Keystone RJ45 jacks must be shielded.  

3. Audio and Control  

  • Loudspeaker: Two or four-conductor, 16 AWG  STP, plenum  

    • One pair Keystone banana jacks termination for every 8-Ohm loudspeaker  

    • One pair Keystone banana jacks termination for 70-Volt loudspeaker distribution  

  • Shielded, twisted pair (STP): Single pair, 22 AWG stranded, shielded, plenum 

4.  Voice

  • CAT6 UTP for VoIP applications


B. Wall Chase

Intent

In the event that the Media Junction Box and associated conduit cannot be installed recessed  within the wall depth, an alternative floor-to-ceiling solution can be used. This has the same purpose as the Media junction box, to be a cable landing zone for classroom and building services related to technology components   

Specifications

A framed chase should be constructed to enclose the Junction Box/conduit from floor to ceiling and painted to match the adjacent wall. This is a large, square chase in anodized aluminum with a furniture feed, device cover plate with three mini-adapter openings, and access door (latching, no locks). See Media Junction Box Detail below for illustration.  

Specified Product

The Legrand Vista Architectural Column  VFL77 2345CM GY D, or Approved Equal.  

Media Junction Box Detail

Detail of media junction box

C. AV Break-Out-Box (BOB) Junction Box

Intent

The BOB Junction box is meant to house a 2-Gang HDBaseT transmitter that can be used to facilitate a hardwired connection for a digital video cable (HDMI) from the outside, and be connected via a single CAT6A junction on the inside of the junction box. This is a surface mounted box for environments where a recessed box is not feasible.

Specification

The ‘BOB’ junction box shall be a surface mounted 2- gang, 4 3/4" (121mm) x 4 3/4" (121mm) x 2 3/4" (57mm) deep box with a 1-¼” conduit pathway ‘home run’ to the media junction box. It should be co-located near user data and electrical outlets. All BOB connections are low-voltage. The junction box will house the wall plate/interface (an HDBT transmitter)  

Specified Product

Wiremold Part# V5744-2 in Ivory or Approved Equal  

Additional Connectivity/Cabling Requirements

  • Shielded, CAT 6 cabling (HDBT-certified) terminated with shielded, female RJ-45 key stone jacks.  

  • STP cable, single pair, unterminated


D. Floorbox

Intent

Floorboxes are typically used to provide AC outlets, AV connections, and LAN connections to a podium or table. Multiple floorboxes in a room can be used to enable relocating the instructor station or in active learning scenarios, infrastructure connection points for group tables/pods.

Specifications

Floor box shall be suitable for raised concrete floor applications. The floor box shall contain minimum for (4) 1-1/4” knockouts and have serviceable gang- sized mount plates with dividable sections for power data and audio-visual connections. Hinged cover plate should allow for attached cables to exit without damage.  

Specified Product

FSR Part# FL-500 series or Approved Equal; Cover panel t.b.d.  


E. Over-the-floor Cable Raceway

Intent

Raceway is used for any cable(s) that needs to run openly between a wall and across an unobstructed the floor for more than 12 inches to a mobile display, podium, or table.

Specifications

Raceway must meet ADA ramp guidelines and all building codes.  Must be suitable for installation in any floor type. AV, Power, and Data should run through separate channels in raceway. Cables in raceway must be easily accessible via a removable cover

Specified Product

ConnectTrack 2.7 On Floor Wireway or Approved Equal


F.  Ceiling Equipment Storage Box

Intent

Ceiling box is used to discreetly place equipment in ceiling, typically above where a display is mounted.  Equipment stored in the box could include an audio amplifier or an HDBaseT receiver.

Specifications

Ceiling junction box shall be plenum-rated false ceiling equipment storage. Projector ceiling box shall fit in “T-Bar” type 2’x2’ or 2’x4’ drop ceiling grids or similar cutouts in hard lid applications. Projector ceiling box shall contain a minimum of 4 electrical outlets, one exposed on ceiling surface specifically for the projector.  Projection Box shall contain fully terminated Media Connection Faceplate from Media Connection Box. Projector ceiling box shall contain 2 rack units of space inside enclosure with optional exhaust fan and have locking door accessible from below finished ceiling. Projector ceiling box shall provide 1.5” NPT threaded fitting to allow for mounting a projector. Ceiling Box shall have adequate seismic safety cabling and shall be anchored to the ceiling top deck, minimum of 4 anchor points. All mounts shall be installed according to manufacturer’s specifications and campus guidelines .  

Specified Product

Premier Mounts Part# GB-AVSTOR3/GB-AVSTOR5 or Approved Equal


G.  Display Ceiling Mount for Ceiling Tile Replacement

Intent

Projector ceiling mount attachment that drops into ceiling tile grid is used in situations were mounting directly to the deck is problematic.  Will still need to be tethered to structural supports.

Specifications

Projector ceiling mount shall be plenum-rated, full-tile false ceiling adapter with quick-lock cables which replaces a  24 inch  (610 mm) x 24 inch (610 mm) ceiling tile. Mount shall feature two or more electrical and cable knockouts for running power or signal. Accepts a  1.5 inch  (38 mm) NPT pipe and uses wingnuts for rapid projector adjustments. The mount also has the ability to shift the display or projector by 4 inches (102 mm) in any direction. All mounts shall be installed according to manufacturer’s specifications and campus guidelines .   All mounts shall have  adequate seismic anchors and a minimum of 4 anchor points.  

Specified Product

Premier Part# PP-FCMA-QL/GB-AVSTOR 5 or Approved Equal


H. TV Box

Intent

To efficiently manage cables behind a wall-mounted display for appropriate wall types.

Specifications

  • TV Box shall install in-between 2 standard wall studs in wall cavity flush to finished wall. 

  • TV Box shall contain 2 low voltage back boxes and 2 UL listed Gem boxes. 

  • Box shall contain one (1) 120 VAC duplex outlet, 2 CAT6 network drops [home run to cable tray, 1-1/4” conduit]. 

  • TV Box shall contain 1-1/4” conduit to AV pull box (ceiling above TV) and 1-1/4” conduit to 3 gang double deep box at 10” A.F.F. (below TV); for conference rooms, AV pathway shall continue to conference table location.

  • TV Box Shall contain mounting for AV connection modules.

Specified Product

FSR Part# PWB-100 or Approved Equal

TV BoxImage RemovedTV BoxImage Added

I. Loudspeaker Back Box

Specifications

Speaker back box shall contain seismic wire safety connection, ¾” conduit connections with whip and sufficient speaker cable to allow for installation and servicing. In most cases, the back box is an integral part of the specified ceiling loudspeaker.

Specified Product

JB L Part# Control-26C; Extron Part# CS120P, SM26, or Approved Equal


J. EMT Conduit

  1. Requirements

    1. All conduits shall be continuously bonded back to the TGBB (telecommunication grounding bus bar) in the TR/ER (telecommunication room/electrical room).

    2. All Audio/Visual Conduits must be (1) 2” or (2) 1-¼ ” between Media Connection box and above ceiling junction box. minimum (1) 1-¼" conduit to each display location.

    3. Audio/Visual Conduits used only for two pair of two-conductor 14AWG speaker wiring can be 1" in diameter.

    4. All conduit terminations will be equipped with bushings.

    5. All conduits shall contain a pull string.

    6. Conduits run for horizontal cabling shall not be installed below a building’s slab; however, they may be installed within the slab.

    7. The maximum allowable pulling force on a 4-pair cable or bundle of cables is 25 lbs. Over-filled conduit, long conduit runs and bends increase the pulling force required to pull the cable.

  2. Conduit Bends

    1. There should be no more than two 90-degree bends (or combination of bends equaling 180 degrees) between pull boxes or pull points.

    2. For reverse bends (between 100 and 180 degrees) insert a pull box at each bend.

    3. The recommended 90-degree bend radius for conduit is 6 times the internal diameter of the conduit; 10 times the internal diameter if the conduit is larger than 2 inches.

    4. Conduit runs should contain no continuous sections longer than 100 ft. without a pull box.

    5. All firewall penetrations will be sleeved and fire-stopped.

  3. Pull Boxes

    1. Pull boxes shall not be used in lieu of a 90-degree bend, and conduits should be aligned such that pulls are straight through with no jogs.

    2. Pull boxes should be located such that conduit runs do not exceed 100 feet.

    3. Minimum size for pull boxes; length should be 8x diameter of the largest entering conduit; width should be 4x the diameter of the largest entering conduit.

    4. If the pull box will require a faceplate with an integrated CAT6 connector, the box depth must allow for an internal cable radius; typically, a 4-11/16” deep box with a 1-1/4” conduit pathway and preferably using a side cable entry.

    5. Where possible, 6-ft. cable service loop(s) should be secured with Velcro-type fasteners above the projector ceiling plate. Zip-ties should never be used on Category cable.


K. Projection Screens  

Motorized screens

Projection Screen wider than 7 feet shall be motorized.

Specifications

  • Projection screen fabric shall have a matte white projection surface (1.0 gain) with black borders if audience falls within viewing angle of screen. 

  • If audience falls within the narrower band a gray "HD" screen (1.2 or 0.8 gain) may be used for the projection screen fabric with black borders.

  • Motorized Screen stop point shall be four feet about finished floor in most situations, exceptions must be reviewed with ITS AV designer and/or client(s). 

  • Screen shall not cover any building system sensors, clocks, or fire alarm flashers.  

  • Recessed screen housing should be separate from any ceiling gird system, allowing for replacement and servicing of screen without damaging ceiling materials. Seismic cables are required , minimum of 4 anchor points.  

  • Screen location must take into account viewing angles, the closest and furthest viewer, and minimize coverage of whiteboards. Refer to Appendix.  

  • Screen control shall below voltage switch and be mounted close to the user area.  

  • Screens must be installed according to manufacturer’s specifications and campus standards.  

Specified Product

Da-lite Cosmopolitan Electrol or Approved Equal  

Manual Screens

  • Manual projection screens over seven feet in width shall not be used.  

  • Projection screen shall have a matte white projection surface with black borders. Screen stop point shall be four feet about finished floor. Screen shall have slow retraction mechanism. Screen shall not cover any building system sensors, clocks, or fire alarm flashers.   

  • Recessed screen housing should  be separate from any ceiling grid system, allowing for replacement and servicing of screen without damaging ceiling materials.  

  • Wall-mounted screens should use a wall mounting board, 1” thick and 8” longer than the screen case dimension, with appropriate and rated mounting brackets.  

  • Screen location must take into account viewing angles, the closest and furthest viewer, and minimize coverage of whiteboards. Refer to Appendix.  

  • Screens must be installed according to manufacturer’s specifications and campus standards.  

  • Any S-clip style mounting components must have a closing mechanism to prevent projector screen from jumping off of bracket.

Specified Product

Da-lite Advantage Model-C CSR or Approved Equal  

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title1.03 Installation Practices and Cabling

Compliance

Comply with the following Codes and Industry Standards 

  1. American National Standards Institute (ANSI).

  2. Electronics Industry Association (EIA).

  3. Audio Engineering Society (AES).

  4. National Electrical Code (NEC).

  5. National Fire Protection Association (NFPA).

  6. UL Compliance: Comply with requirements of UL 50.

  7. California Building Code 2010

  8. California Fire Code 2010

  9. Building Industry Consulting Service International (BICSI)

  10. Audiovisual and Integrated Experience Association (AVXIA)

  11. Cal State Telecommunication and Infrastructure Performance standards (TIP) 

  12. Any other additional codes or regulations as identified by the AHJ

Installation Practices

  • Dedicated EMT conduit shall be installed when possible. In the situation where dedicated conduit runs are not viable ,  non-contiguous cable support mechanisms may be used.  Non-contiguous cable support mechanisms such as hangers, rings, and hooks shall not be   spaced farther than four (4) feet apart. All manufactured raceways used for cables shall be installed according to the raceway manufacturer’s specifications.

  • All above-tile plenum cables cannot lay against the ceiling tile and must be supported with dedicated hanging wire(s) and J-hooks.  

  • Cable runs shall be supported with devices  such as J-hooks designed for this purpose, and are to be installed independent of any other structural component.  

  • Cables routed vertically up walls, or between floors as vertical riser, shall be supported with clamps or other mechanisms. These supports shall occur at least three times per floor.  

  • Cable stapling of any recognized media type shall not be permitted.  

  • Cables shall be dressed in conveniently sized bundles and either laced or banded. Lacing   or banding shall not be so tight as to deform cable bundles.  

  • Cabling installed with a bend radius less than that recommended by the cabling manufacturer is not acceptable.  

  • Cables and bundles terminating at equipment or connector panels shall be supported so as not to put strain on connections or connectors.  

  • All bulk cables  shall be cut to the length dictated by the run. No splices shall be permitted in any pull   boxes without prior approval of the Owner.  

  • Cabling for equipment mounted in drawers or on slides shall be provided with a service loop   of appropriate length. A cable management support for the service loop shall be provided to   prevent the service loop travel from interfering with the operation of the drawer or slide, or   snagging on adjacent cabling.  

  • Wherever possible, m microphone level, line  level, loudspeaker level  and  data cables  shall  each  be run in separate   conduits, trough, raceway divider, and cable bundles. Low voltage DC and control may be   run along with any but microphone or line-level runs.  

Termination

  • All termination components must meet or exceed all specifications for given media type and application as described in this document and system drawings.  Cable service loops shall be provided. 

  • Crimp-on connectors shall be installed only on the appropriate size cable using the manufacturer-recommended crimp tool and die set. 

  • Connections to electronic devices providing screw terminals shall be terminated using the appropriate gauge insulated spade or ring crimp terminal connector and crimp tool. 

  • All mechanical solder-on connectors shall be attached to cable ends using rosin core solder. 

  • Audio signal cable shields shall be protected with the appropriate gauge Teflon or heat-shrinkable tubing. The jacket end of each audio cable shall be fitted with the appropriate gauge heat shrinkable tubing to provide additional protection to the base of the shield or shield foil. This also applies to the inside of mechanical connectors and cables that terminate at partitioned barrier strips.

Labeling

  • All cables shall be permanently identified at each end by machine-printed cable markers. 

  • Every cable shall have a unique tag number identifier for each cable. The Contractor shall include this unique tag number on the As-Built signal flow documentation. 

  • Cable markers shall be placed two (2) inches from where the cable exits the strain relief of the connector, but never within a cable bundle. 

  • Cable labeling followings the AVIXA Standard, Cable Labeling for Audiovisual Systems, AVIXAF501.01:2015

  • Each cable marker shall include, in addition to the unique tag number identifier, the name of the origination and destination equipment termination at each cable end. 

Specified Product

Impact Inc, Advanced Wire Marking System, LSL-78 or equivalent

  • Example of Existing Labelling

    Old Label ExampleImage RemovedOld Label ExampleImage Added
  • Updated Labeling to Match AVIXA Standards

    DAV-R03. PnI02-Swt4

Video Cable (Bulk)

CAT6A

Specifications

Cable for video should be HDB aseT (HDBT) certified CAT6 a , s solid conductor, 23  AWG, 4-pair, shielded, 625-MHz. Plenum-rated. Color: green, else black. 

Specified Product

Infinity Cable ABA TSP2304503, ICE CAT6 a  Plenum Shielded, or Approved Equal  

CAT6A Connector

Specifications

CAT6A cables shall be terminated with shielded, modular keystone jacks  ( Hubbell  style) .

Specified Product

Hubbell PART# SJ6A or Approved Equal

Coaxial (single)  

Specifications

Cable should be RG59/U, Plenum-rated, white.  

Specified Product

ICE RG-59 HDTV Plenum


Video Cables (Patch)

HDMI User Cable

Specifications

  • HDMI Patch Cable should be  at minimum HDMI 2.0 verified, 18 Gbps, CL3P certified, shielded, 24awg, gold plated connectors.

  • 6 to 15 feet in length

  • Flexible PVC cable

Specified Product

Extron HDMI Ultra Series (length TBD) or Approved Equal

HDMI Patch Cable

Specifications

  • HDMI Patch  Cable should be  at minimum   HDMI  2.0  verified , 1 8  Gbps, CL3P certified, shielded, 24awg, gold plated connectors. 

  • Color: green, if available.

Specified Product

Comprehensive MICROFLEX Pro AV/IT Series High Speed HDMI 24 AWG with ProGrip, SureLength, CL2P Cable or Approved Equal, length TBD

Shielded CAT6 a  (Video- HDBT)

Specifications

Shielded CAT6 a, Solid conductor, 24 AWG, 4-pair,  475-MHz. Terminated with shielded RJ-45 plugs.

Specified Product

Extron XTP DTP 24/n (length TBD) or Approved Equal


Audio & Control Cable (Bulk)

Loudspeaker cable 

Specifications

Loudspeaker Cable is jacketed 16 AWG  or 14 AWG, depending on amplifier wattage and cable length; shielded, and plenum-rated with overall jacket.  

Specified Product

Belden Part# 6200UE; West Penn Part# 25225B or Approved Equal  

Control & Audio Wire  

Specifications

Cable is 22 AWG, shielded, twisted-pair, stranded, plenum-rated  

Specified Product

Belden Part# 9451P or Approved Equal


Data Communication Cable

Bulk cable  

Specifications

Data communication cable shall be Plenum-rated CAT6, 23awg, 4  Pr, Solid, 550mhz (w/spine), HDBaseT Certified, color blue.  

Specified Product

Infinity Cable ABA TSP 2304503 or Approved Equal  

Data Patch Cables  

Specifications

Data patch cables shall be 23awg, 4 Pair, Stranded, Color blue with RJ45 connectors.   
Length TBD

Specified Product

TBD

...

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title1.06 Room Design Considerations

Projector Mounting Distance  

  1. The projector mount shall be located at the closest distance that allows for 50% focal length of the lens to  project the required image size; the distance is typically twice the width of the projection screen with "normal" lens.    

  2. Construction documents must specify consultation with knowledgeable  university official prior to the installation of the projector infrastructure to  insure  the proper locations as dictated by purchased projector model  relative to infrastructure such as lighting and HVAC .  

Lighting

  1. Lighting Design: Lighting shall have the ability to be turned on/off in zones progressing from the front of the room to  the rear . 

  2. Lighting fixtures shall be ceiling recessed ( no hanging light fixtures ) and non-obstructing for the use of a video projector. 

  3. The projection screen surface  or LCD display  shall be free  of any direct lighting illumination .    

DAY LIGHTING MODE  

General Mode / Non-Daylight  

AV Mode  

Student Desk  

30 fc min   150-200 fc max  

30 fc min   70 fc max  

10 fc min  

Whiteboard  

30 fc vertical min  

30 fc vertical min  

N/A  

Screen  

N/A  

N/A  

8 fc vertical allow 8:1 video image with 3000 lumen  projector  

Walls  

10 fc vertical  

10 fc vertical  

N/A  

Table 2:  Illumination values Foot Candle (fc) Guidelines based on the “IESNA Lighting Handbook Reference and Application”, Ninth Edition Figure  4  - Lighting Zones  

Window Shades

Window coverings Windows shall have window coverings capable of reducing outside light with easy to operate controls. 

Available Whiteboard Space with Concurrent Projector Use  

  1. Whiteboard usable space  

  2. Whiteboards placed in classrooms shall have a minimum of 10’ of total linear writing surface available to users while the projection screen is in use.  

Building Systems/Life Safety Systems  

Safety systems  

  1. Design considerations shall incorporate the use of Mass Notification systems as warranted by National Fire Alarm Code (NFPA 72) and campus standards. The Audio Speakers shall comply with the intelligibility requirements set forth in NFPA 72-2010.

  2. Safety system warning devices shall not be placed on wall surfaces that will be covered by a projection screen. 

Clock systems  

Clocks shall not be placed on the projection wall.  Clocks shall be self-correcting and integrated into the building clock system.    

Building system sensors  

Building systems sensors shall not be placed on wall surfaces that will be covered by a projection screen.  

Assisted Listening Systems (ALS)  

Compliance

  1. Assisted listening systems shall be in accordance with section 219 and in compliance  California Building Code Title 24 and  section 706 of the revised  2010 ADA regulations. 

  2. Assisted  Listening Systems shall be integrated into Audio – Visual systems, have auxiliary inputs, and appropriate signage.   

Specifications

  1. Furnish and install a net work a net work based, wireless assisted listening system for use by the hearing-impaired  or impaired  or others needing hearing assistance assistance .

  2. The assisted listening system (ALS) shall be capable of  streaming of  streaming audio to end-user mobile devices devices .

  3. The ALS system shall have 80dB SNR or greater, end-to-end. 

  4. The  application The  application on the mobile device  will  allow device  will  allow for the use of  a stereo headset , Bluetooth audio of  a stereo headset , Bluetooth audio transmission, or the use of a neck loop depending on the device’s hardware capabilities.      

Specified Product

Broadcast Vision Entertainment  AudioFetch Express  or Entertainment  AudioFetch Express  or Approved Equal  .

Furnish and install the following components

*The Americans with Disabilities Act (ADA) 2010 ADA Standards requires public facilities to provide auditory assistance devices.  Section: 706 Assistive Listening Systems 

  1. AudioFetch Express (Qty: 1 ea.) 

  2. Listen Technologies LA-166 Neckloop.  (Qty: 2 ea.) 

  3. Listen Technologies LA-304 ADA Access/Compliance signage kit. (Qty 1 ea.) 

...

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title1.10 Appendix

Essential Loudspeaker Formulas

RC = (HC - HL) tan (A)
DC = (HC - HL) / cos (A)
ΔLA = 20 log [DR / (HC - HL)]
ΔLE = 20 log (DR / DC)
LMINREF = LMIN - ΔLE + Isobar
LMAXREF = LMAX - ΔLA

Where:
RC = Radius at coverage angle and listening plane
HC = Ceiling height
HL = Listener height
A = Coverage angle at isobar
DC = Distance from speaker at coverage angle and listening plane
ΔLA = Distance loss for listener on-axis (inverse square law)
DR = 1 meter or 3.28 feet reference distance
ΔLE = Distance loss for listener at isobar
LMINREF = Minimum target level on-axis at reference distance
LMIN = Minimum needed level for listener at isobar
Isobar = Boundary with a specified SPL attenuation
LMAXREF = Maximum target level on-axis at reference distance
LMAX = Maximum target level for listener on-axis


Viewing Distances

There are different models for calculating the optimal screen size of a display or projection screen based on where the closest and furthest viewers are located based on the type of viewing activity.  For classroom designs we specifically look at two models,    Calculations are based on information from the AVIXA standard:  The Basic Decision Making Model and the Advanced Decision Making Model.  The formula takes into account 20/20 vision and and the size of an element on a screen.  A guide on the AVIXA BDM and ADM calculations are shown below.

DISCAS standard- key steps to determine the image size
Second, determine the viewability of display content
BDM Farthest Viewer
While the standard's formula will give you your exact EH, there are some general guidelines for practical
The key factors

Where the formula comes from:

Projector formula
Projector formula variables
For 20-20 vision

Media Junction Box Detail (typical use)  

The Media Junction Box is the common connection point in the front of the room for AV gear dispersed throughout the facility. The connections include—but are not limited to—LAN, 120VAC service,  loudspeaker, RS-232 control, HDB aseT video, etc. All connections are to terminate with standard connectors on standard plates.    

Specified Product

Legrand EN2850, Legrand Vista Column or Approved Equal  

Media Junction Box diagram. Outline of ChaseDownward facing 120VAC Duplex

Equipment Mounting (typical use)  

There are unlimited mounting possibilities. These represent some of the solutions we have used in previous installations, but the Project Designer or Architect may require further customization for any given project. Seismic anchoring shall be used; all-thread shall be 3/8” minimum. 

Figure 7    Figure 8 

Figure 9     Figure 10

Figure 11     Figure 12

Figure 13     Figure 14

Equipment Rack Layout (Typical use)

Installation Contractor Scope and Practices (Typical use)

Installation Contractor

Info
  • Refer to provided diagrams and layout drawings.

  • Refer to bulk cable schedule.

  • Install practices must adhere to campus AV standards.  

  1. Large Screen Displays

    1. Mount TV(s) to supplied TV mounts  

    2. Provide HDbaseT certified cable wiring from TV to AV Media Box location.

      1. Terminate with appropriate punch-down keystone terminal  

      2. Two (2) cables (primary and (non terminated ) spare)  

    3. Provide  HDbaseT Cat6 cable wiring from TV locations to AV Media Box location for AV control  

      1. Terminate with appropriate punch-down keystone terminal  

      2. connect network control cable  

    4. Provide speaker 16 gauge (AWG) speaker wire between TV box and AV media box  

      1. Terminate in banana plug terminals  

    5. Connect HDbaseT receiver to Displays  

      1. Supply HDbaseT patch cable  

      2. Supply 'secure-grip' HDMI cable  

      3. Supply control cable  

  2. Projector

    1. Mount projector to supplied projector mount  

      1. align image to maximum screen size  

        1. level image and minimize use digital screen/image manipulation  

        2. Provide  HDbaseT certified cable wiring from Projector to AV Media Box location  

          1. Terminate with appropriate punch-down keystone terminal  

          2. Two (2) cables (primary and spare)  

      2. Connect HDbaseT receiver to projector  

        1. Supply HDbaseT patch cable  

        2. Supply 'secure-grip' HDMI cable  

      3. Provide  HDbaseT  Cat6 cable wiring from TV locations to AV Media Box location for AV control  

        1. Terminate with appropriate punch-down keystone terminal  

        2. Connect control cable to projector

  3. Smart Whiteboard/Web Cam   

    1. Install and mount at projector location  

      1. Install USB extension cable  

      2. Connect to OFE  

  4. Speakers

    1. Install Speaker mounts  

      1. Refer to layout diagram for location 

      2. Location to be field verified with Blue tape 

      3. Mount Speaker on supplied speaker mount 

      4. connect speaker wire to display box banana plug terminal 

  5. Instructor's Table

    1. Install AV components at the instructor table

  6. Rack 

    1. Install all OFE equipment per wiring diagram and rack elevations  

      1. Update all equipment to latest firmware  

      2. Supply all necessary cables to connect OFE  

      3. Supply Laptop connection cables  

      4. Label all cables and power supplies  

      5. Configure all OFE to meet functionality of System intent  

      6. Configure EDID of all devices set to 1920x1080 2  ch  audio  

    2. Provide programming for the system and device configuration  

    3. Supply customer with original code and configurations for all devices  

    4. Provide customer with Instruction Sheet  

    5. Provide customer with all manuals and warranty information.   Interconnect AV gear in rack. HDMI cables must be supported so there is no weight on the connectors. Only Velcro-type cable straps may be used. Power cables should be bundled individually so that devices may be removed for servicing. Provide service loops. Low-voltage cables to MLC controller should be long enough to allow the controller to be removed for rear access and service.  

    6. Test all video and audio sources and display.  Provide completed AV9000 checklist for system performance, prior to requesting system commissioning and sign off.  

    7. Align projector as required. No keystone adjustment should be used.  

    8. Adjust projector screen drop as needed.  

    9. Notify Facilities Project Manager that room is complete and ready for inspection.  

    10. Return all remote controls, manuals, cables and software to Customer.  

    11. Provide as-built drawings.   

    12. Dispose of all boxes and packing materials

Installation Contractor Responsibilities 

Compliance: Comply with the following Codes and Industry Standards

  1. American National Standards Institute (ANSI).

  2. Electronics Industry Association (EIA).

  3. Audio Engineering Society (AES).

  4. National Electrical Code (NEC).

  5. National Fire Protection Association (NFPA).

  6. UL Compliance: Comply with requirements of UL 50.

  7. California Building Code 201 6

  8. California Fire Code 201 6

  9. Building Industry Consulting Service International (BICSI)

  10. Audiovisual and Integrated Experience Association (AVXIA)

  11. Audio-Visual System design and installation contractors shall have a minimum of 1 AVIXA CTS-D certified member   

  12. 1 4 . Cal State Telecommunication and Infrastructure Performance standards (TIP) 

Cabling, Equipment, and Installation

  1. Providing all cable and pull strings in conduits for the specified systems.  

  2. Providing station cables for connection of IP-enabled audiovisual equipment to associated data network outlets, including but not limited to instructor’s computers, laptop connections,   system processors, and LCD displays. This applies to all equipment installed by the   Contractor, including Owner-Furnished (OFCI) items. Coordinate station cable requirements with the greater building-wide structured cabling system.  

  3. Coordinating and providing cable labels as stipulated by the owner and/or specified herein. 

  4. Furnishing and/or installing all equipment as specified. 

  5. Installing Owner furnished equipment as specified. 

  6. Providing loudspeakers as complete assemblies with back boxes, grilles, tile bridges, wall mounts, hanging hardware and other installation hardware as required.

  7. Providing to the owner, upon completion, all accessories and ancillary items included with the manufacturer’s equipment but not used for the physical installation of the device. This shall include all user manuals, remote controls, batteries, tools, installation hardware,   carrying cases, protective covers, etc.  

  8. Furnishing all tools and equipment to ensure the work is performed in a safe and professional manner. 

  9. Interconnecting all components, both internal and external to rack cabinets, and furnishing all necessary cabling. 

  10. Ensuring that all cabling, equipment, and terminations are installed in accordance with accepted industry standards, approved shop drawings, manufacturer’s recommendations  and as stipulated herein.

  11. Providing cable management hardware as required including; that required internal to rack cabinets; that required between pieces of equipment not housed in rack cabinets; and that required to extend cabling from rack cabinets and equipment to the greater facility cabling infrastructure.

  12. Providing custom cover plates, wall plates, I/O connection plates, floor box insert plates as required. Coordinate with the Architect and/or Owner on the final selection of finishes. 

  13. Ensuring that all equipment, with the exception of portable equipment, is firmly fastened or attached in place. A safety factor of at least four shall be utilized for all brackets, fasteners  and attachments. Provide safety retention cables for overhead equipment such as loudspeakers, projectors, etc.

  14. Ensuring  that all equipment mounting styles and locations comply with the 2010 ADA  

  15. Standards for Accessible Design. 

  16. Ensuring all equipment including switchers, transmitters, receivers, or any other gear in the signal chain is configured appropriately for system functionality and design.  Including the proper configuration of outputs for EDID and HDCP and audio.  

System Acceptance

  1. If the Final Documentation submittal is determined by the Owner to be complete and accurate, the Owner will approve the submittal and forward the Final Documentation package to the Owner.  

  2. If the Final Documentation Submittal is determined by the Owner to not be complete and/or inaccurate, the Owner will return the package to the Contractor with a written listing of the required modifications. Upon completion of all of the required modifications, the Contractor shall resubmit the Final Documentation to the Owner for approval. The Final Documentation Submittal, and therefore the project, shall not be considered to be complete until all required documentation modifications have been made and approved by the Owner on behalf of the Owner.  

  3. Upon successful completion of Final Tests, Documentation and Training, the Contractor shall notify the Owner, in writing, that the system is complete. The Owner shall have fifteen (15) days to generate a “punch list” of omissions, adjustments, corrections and the like and respond in writing to the Contractor. In the absence of such a “Punch List”, the system shall be considered to be complete. 

  4. The warranty shall commence on the fifteenth day after the Contractor’s notification of completion of work, and the Owner shall process final payment. In the event that further work is required to complete this project, the Contractor shall be prepared to continue work, without additional compensation, until the system is accepted. 

Cabling

  1. All cabling and termination shall be executed in adherence to standard industry practices and as outlined in:

    1. AV Installation Handbook: Best Practices for Quality Audiovisual Systems – Second Edition:  InfoComm International, 2009  

    2. Philip Giddings - Audio Systems Design and Installation: Boston Focal Press, 1990

    3. Kenneth T.Deschler - Cable System Design and Installation: McGraw-Hill, Inc. 1987  

  2. Cable Length Verification: Cable lengths where given in the Specification, for bulk or manufactured cable assemblies, have been provided to assist the Contractor in the bidding process. Cable run lengths, where specified, are end-point-to-end-point estimates and include consideration for tails. Estimates may be based upon cable tray systems; raceways, conduit runs, and furniture layouts indicated on construction drawings and may vary from the actual installed cable pathways. It is the responsibility of the Contractor to field verify required cable lengths for bulk cable or manufactured cable assemblies prior to ordering. 

  3. Cable Installation

    1. Non-contiguous cable support mechanisms such as hangers and hooks shall not be spaced farther than four (4) feet apart. All manufactured raceways used for cables shall be installed according to the raceway manufacturer’s specifications  

    2. Cable runs shall be supported with devices designed for this purpose and are to be installed independent of any other structural component. 

    3. Cables routed vertically up walls, or between floors as vertical riser, shall be supported with clamps or other mechanisms. These supports shall occur at least three times per floor. 

    4. Cable stapling of any recognized media type shall not be permitted.

    5. Cables shall be dressed in conveniently sized bundles and either laced or banded. Lacing or banding shall not be so tight as to deform cable bundles. 

    6. Cabling installed with a bend radius less than that recommended by the cabling manufacturer is not acceptable.

    7. Cables and bundles terminating at equipment or connector panels shall be supported so as not to put strain on connections or connectors. 

    8.   All cables, with the exception of video or pulse cables, which must be cut to an electrical length, shall be cut to the length dictated by the run. No splices shall be permitted in any pull boxes without prior approval of the Owner.  

    9. Cabling for equipment mounted in drawers or on slides shall be provided with a service loop of appropriate length. A cable management support for the service loop shall be provided to prevent the service loop travel from interfering with the operation of the drawer or slide, or snagging on adjacent cabling.

    10. Microphone level, line level, loudspeaker level, and video lines shall be run in separate conduits, trough, raceway divider, and cable bundles. Low voltage DC and control may be run along with any but microphone or line-level runs.  

  4. Termination

    1. All termination components must meet or exceed all specifications for given media type and application as described in this document and system drawings.  

    2. Crimp on connectors shall be installed only on the appropriate size cable using the manufacturer recommended crimp tool and die set. 

    3. Connections to electronic devices providing screw terminals shall be terminated using the appropriate gauge insulated spade or ring crimp terminal connector and crimp tool. 

    4. All mechanical solder-on connectors shall be attached to cable ends using rosin core solder.

    5. Audio signal cable shields shall be protected with the appropriate gauge Teflon or heat shrinkable tubing. The jacket end of each audio cable shall be fitted with the appropriate gauge heat shrinkable tubing to provide additional protection to the base of the shield or shield foil. This also applies to the inside of mechanical connectors and cables that terminate at partitioned barrier strips. 

    6. Labels / Wire Markers

      1. Except where otherwise indicated, all rack-mounted equipment, switches, controls, and interface panels shall be clearly labeled. 

      2. Rack mounted equipment shall be labeled with engraved and filled plastic laminate.

      3. Where appropriate, the function of, or the input, output, or loudspeaker(s), served by each device shall be indicated.

      4. Other methods of labeling rack mounted equipment may be accepted pending prior approval by the Owner and/or Consultant.

      5. All cables shall be permanently identified at each end by machine printed cable markers.  

      6. Every cable shall have a unique tag number identifier for each cable. The Contractor shall include this unique tag number on the As-Built signal flow documentation. 

      7. Cable markers shall be placed two (2) inches from where the cable exits the strain relief of the connector, but never within a cable bundle. 

      8. Each cable marker shall include, in addition to the unique tag number identifier, the name of the origination and destination equipment termination at each cable end. (See example below). 

A107 Switcher Audio out 1-LImage RemovedA107 Switcher Audio out 1-LImage AddedDAV-R03. PnI02-Swt4
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title1.11 Standard System Designs

The layouts and designs presented below represent the standard 2019 Core 1 Classroom design for University Scheduled Classrooms.

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