Stakeholder Work Session Simplification of the Tailored Method - - PowerPoint PPT Presentation

California Statewide Utility Codes and Standards Program

10/18/2010

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Stakeholder Work Session Simplification of the Tailored Method

Heschong Mahone Group, Inc. Integrated Lighting Concepts, Inc. October 19, 2010

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Simplification of the Tailored Method Agenda

• Review proposed language and tables for the Area

Category Method and Tailored Method

• Additional lighting allowances
• Discuss which linear or area allowances can be reduced in this

cycle, based on advances in lamp efficacy.

• Overlap between the general 0.2 W/sf allowance for task lighting,

and the proposed additional task lighting adders.

• There is not currently a definition for “task area” in Title 24.

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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Simplification of the Tailored Method Agenda (continued)

• Room Cavity Ratio allowances
• Does the proposed multiplier account for real-world variation?
• Should base LPDs be based on low RCR spaces, with additions

for higher RCRs?

• Discuss the possibility of gaming, and any added compliance

burden.

• New IESNA Handbook #10
• Title 24 may refer to the new IESNA Handbook (10th Edn.), if it is

available in advance of the third stakeholder meeting (January 2011)

• 10th Edn. will likely include new age-based illuminance
• recommendations. Discuss whether/how Title 24 should allow

additional power for spaces with older occupants.

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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Current Code Requirements

• Area Category
• Area Category LPD allowances (table 146-F)
• Plus additional allowances in footnotes
• Tailored Method
• Special LPD allowances (table 146-G)
• IESNA Illumination Category (typically B-D)
• Wall Display Power (W/ft)
• Floor Display Power (W/ft²)
• Ornamental/ Special Effect Lighting

(W/ft²)

• Adjustments for Mounting Height (table 146-H)
• LPDs based on IESNA categories (table 146-I)

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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

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Summary of Code Change Proposals

• Remove as many Primary Function Areas as possible

from Tailored Method, focusing on those that have one

• r fewer special allowances
• Consolidate the extensive footnotes under the Area

Category table (146-F), designate which area types are eligible

• Eliminate Mounting Height Factor Table
• Eliminate Room Cavity Ratio table
• Merge Common Space Types Under Tailored
• Hotel, Dinning, Convention/Conference into Hospitality
• Retail Merchandise, Groceries and Dining into Retail

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Additional Lighting Allowances

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Primary Function Areas to Primary Function Areas to be Trans be Transferred erred to to Area Category Area Category Method Method

Il Illuminat nation

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Categor Category Wall ll Disp Display y Power Power (W/ (W/ft) Floo Floor r Disp Display y Power Power (W/ (W/ft²) Ornam Ornamenta ntal/ Spe Special Effect Effect Ligh Lighting ng Commercial and industrial storage Inactive Active: bulky items; large labels Active: small items; small labels B C D Correction Facility cells and day rooms D Dressing room D Education facilities Classrooms, lecture, training, vocational room Science Labs D E 5.5 5.5 Food Service Facilities Butcher Shop, Food Display, Galley, Kitchen, Scullery All other E C Housing, Public and Commons Areas Multi-family Dormitory, Senior Housing D D 0.9 0.9 Laundry D Library (Reading areas, Stacks ) D 0.6 Locker C Office Open office; Intensive VDT use Open office; Intermittent VDT use Private Office D E E Stairways and corridors; toilets and washrooms B Tenant lease space C

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Additional Lighting Allowances

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Primary Function Primary Function areas to be areas to be retained retained in Tailore in Tailored d Method Method —CAN ANY B —CAN ANY BE REDUCED? REDUCED?

Il Illuminat nation

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Categor Category Wall ll Disp Display y Power Power (W/ (W/ft) Allowed Floo Allowed Floor r Disp Display Power y Power (W/ (W/ft²) Allowed Allowed Ornam Ornamenta ntal/ Spec Special Effect l Effect Ligh Lighting ng Auditorium D 2.25 0.3 0.5 Civic Meeting Place D 3.15 0.2 0.5 Convention, conference, multipurpose and meeting centers D 2.5 0.4 0.5 Dining B 1.5 0.6 0.6 Exhibit, museum C 20.0 1.4 0.7 Financial Transactions D 3.15 0.2 0.6 Grocery store D 9.9 1.1 Hotel function area D 2.25 0.2 0.5 Lobbies: Hotel lobby C 3.15 0.2 0.60 Lobbies: Main entry lobby C 0.2 Lounge/recreation C 7 0.7 Malls and atria D 3.5 0.5 0.6 Religious worship D 1.5 0.5 0.5 Retail merchandise sales, wholesale showrooms D 17.0 1.2 0.7 Theaters: Motion picture C 3 0.6 Theaters: Performance D 6 0.6 Transportation Function D 3.15 0.3 0.6 Waiting area C 3.15 0.2 0.6 All other primary function areas not already included in Tables 146-F or 146-G IESNA HB

• Proposed Tailored Method Special LPD allowances (table 146-G)

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Specifics of Code Change Proposals

• The following primary function areas may use the IESNA Lighting

handbook to determine Illuminance categories

• Exercise center, gymnasium
• Medical and clinical care
• Police or fire stations, correctional facilities
• Public rest areas along state and federal roadways
• All other primary function areas not already included in Tables 146-F or

146-G

• To calculate LPD for these types, determine the Illuminance

category (A-G) specified in the IESNA Lighting Handbook (IESNA HB), and refer to the “Design Guide” for Illuminance (fc) values. These function areas do not receive lighting power allowances for wall display, floor display, or ornamental/special effects lighting.

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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Additional Lighting Allowances

Area Category Method

Table 146-F Footnotes: The additional LPDs listed below may be added when using the Area Category Method of Compliance. Only those primary function areas having one of the following footnote numbers are allowed this added lighting power. The plans shall clearly identify all task spaces using these tasks and the lighting equipment designed to illuminate these tasks. Tasks that are performed less than two hours per day or poor quality tasks that can be improved are not eligible for these allowances. Footnote Number

Type of lighting system Highest allowed added lighting power 1 specialized task work 0.2 W/ft² area of task space 2 specialized task work 0.5 W/ft² area of task space 3

• rnamental or special effects

lighting 0.6 W/ft² area of task space 4

• rnamental chandeliers and

sconces 1.0 W/ft² area of task space 5 precision commercial and industrial work 1.0 W/ft² area of task space 6 white board or chalk board 5.5 W/ linear foot

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Industrial, auto repair, electrical rooms etc. Library stacks & reading areas, kitchens Hotel lobbies etc

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Additional Lighting Allowances

• Task lighting
• Current definition in Section 101:
• TASK LIGHTING is lighting that is designed specifically to

illuminate a task location, and that is generally confined to the task location.

• Proposal is to remove the allowance for task lighting:
• EXCEPTION to Section 146(a) Up to 0.2 watts per square

foot of portable lighting for office areas shall not be required to be included in the calculation of actual indoor lighting power density.

• Instead, offices would receive a 0.2 W/sf adder from

the footnotes under the Area Category table

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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Room Cavity Ratio Allowances

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IESNA Illuminance Category RCR<3.5 3.5<RCR<7.0 RCR>7.0 A 0.2 0.3 0.4 B 0.4 0.5 0.7 C 0.6 0.8 1.1 D 0.9 1.2 1.4 E 1.3 1.8 2.5 F 2.7 3.5 4.7 G 8.1 10.5 13.7

• Current allowances for Room Cavity Ratio
• Current (2008) code, Table 146-I Illuminance

Categories A Through G, Lighting Power Density Values (Watts/Ft2)

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

Room Cavity Ratio Allowances

• Proposed PAFs for Room Cavity Ratio
• Proposal is to replace Table 146-I with PAFs
• Values are based on the ratios between LPD

allowances in Table 146-I 2008, for categories A-G

• Does this accommodate real-world variation?
• Does this encourage gaming?

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TYPE OF CONTROL TYPE OF SPACE FACTOR

Luminaires in spaces with high Room Cavity Ratio (may be used in conjunction with other PAFs) 3.5 < RCR < 7.5 0.75 7.5 < RCR 0.55

CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

Revisions to the Tailored Method

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

• New IESNA Handbook #10
• Title 24 may refer to new IESNA Handbook

(10th Edn.), if available January 2011

• 10th Edn. will likely include new age-based

illuminance recommendations.

• Should Title 24 be based on the “middle column”?
• Should Area Category Method allow additional

power for spaces with older occupants?

• Should Title 24 allow designers to choose Tailored

“all other“ space type to claim the age allowance?

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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM

10/19/2010 CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes

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QUESTIONS & COMMENTS