Publishing the Full Text of Memorandum from the Office of the Presidential Assistant for Rehabilitation and Recovery Infrastructure Cluster Dated June 11, 2014, Entitled "Minimum Performance Standards and Specifications for Public Buildings"

July 10, 2014 REVENUE MEMORANDUM CIRCULAR NO. 064-14 SUBJECT : Publishing the Full Text of Memorandum from the Office of the Presidential Assistant for Rehabilitation and Recovery Infrastructure Cluster Dated June 11, 2014, Entitled "Minimum Performance Standards and Specifications for Public Buildings" TO : All Internal Revenue Officials, Employees and Others Concerned For the information and guidance of all concerned, quoted hereunder is the full text of Memorandum from the Office of the Presidential Assistant for Rehabilitation and Recovery Infrastructure Cluster dated June 11, 2014: "Republic of the Philippines DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS OFFICE OF THE SECRETARY Manila June 11, 2014 OFFICE OF THE PRESIDENTIAL ASSISTANT FOR REHABILITATION AND RECOVERY INFRASTRUCTURE CLUSTER MEMORANDUM FOR: Secretary VIRGILIO R. DE LOS Secretary MARIO G. MONTEJO REYES Department of Science and Department of Agrarian Reform Technology Secretary PROCESO J. ALCALA Secretary RAMON R. JIMENEZ, JR. Department of Agriculture Department of Tourism Secretary ARMIN A. LUISTRO Secretary GREGORY L. DOMINGO Department of Education Department of Trade and Industry Secretary CARLOS JERICHO L. Secretary JOSEPH EMILIO A. PETILLA ABAYA Department of Energy Department of Transportation and Communications Secretary RAMON J. P. PAJE Hon. PATRICIA B. LICUANAN Department of Environment and Commission on Higher Education Natural Resources Secretary CESAR V. PURISIMA Hon. EMMANUEL JOEL J. Department of Finance VILLANUEVA Technical Education and Skills Development Authority Secretary ENRIQUE T. ONA Hon. ANDRES F. IBARRA Department of Health Local Water Utilities Administration Secretary MANUEL A. ROXAS II Hon. GAMALIEL A. CORDOBA Department of the Interior and Local National Telecommunications Government Commission Secretary LEILA M. DE LIMA Undersecretary ALEXANDER P. Department of Justice PAMA Office of Civil Defense Secretary ROSALINDA Hon. JOSE MIDAS P. MARQUEZ DIMAPILIS-BALDOZ Supreme Court Office of the Court Department of Labor and Administrator Employment SUBJECT : MINIMUM PERFORMANCE STANDARDS AND SPECIFICATIONS FOR PUBLIC BUILDINGS Please refer to the attached "Minimum Performance Standards and Specifications for Public Buildings" for your reference in the preparation of design plans for the rehabilitation and reconstruction of typhoon Yolanda damaged office buildings and other vertical structures. ETDSAc Thank you for your cooperation. (original signed) ROGELIO L. SINGSON Secretary Chairperson, Infrastructure Cluster Cc: Secretary PANFILO M. LACSON Office of the Presidential Assistant for Rehabilitation and Recovery MINIMUM PERFORMANCE STANDARDS AND SPECIFICATIONS FOR PUBLIC BUILDINGS (e.g., Municipal Building, Multi-Purpose Building, Public Market) ARCHITECTURAL DESIGN STANDARDS: Public Office Building Design: Particulars Recommended Space Requirements Main Lobby 0.25 sq.m./pax; minimum for lobby as waiting/standing room = 0.28 sq.m./pax Working area of personnel (rank and file) 4.00-6.00 sq.m./pax Conference Room 1.20 sq.m./pax including aisles and demonstration space Toilet Facilities {per Revised National 1.50 sq.m. per one (1) water closet (WC) Plumbing Code of the Philippines (R.A. enclosure/toilet stall 1378)} a. For Employee's use 1 WC/1-15; 2 WC/16-35; 3 WC/36-55 for male and female 1 lavatory/40 for male & female (or ratio of: 1 lavatory/2 WC) b. For Public use 1 WC/1-100 for female 1 WC/1-200 for male 1 urinal/1-100 for male 1 lavatory/2 WC for male & female c. For persons with disabilities 1 WC/toilet stall (1.70m x 1.80m (PWDs) clear dimension) per male & female (or 1 PWD toilet common for male PWD, female PWD & for the elderly) Hallway/Corridor/Stairway Width 1.20 m wide (minimum); ideal = 2.40 m wide (clear) or 0.60m width per person No. of Fire Escape Stair/Exit Required Minimum of two (2) exits where no. of occupants is: over 30 for offices; over 50 for assembly areas (e.g., training room/hall, gymnasia, auditoriums) Subject for compliance with the provisions of the New Fire Code of the Philippines (R.A. No. 9514) and the National Building Code of the Philippines (P.D. No. 1096); whichever provision is more stringent shall apply. shall apply. OFFICE SPACES OF KEY OFFICIALS/OFFICES FOR A TYPICAL MUNICIPAL BUILDING: (Subject for verification) Particulars Recommended Space Requirements 1. Mayor's Office 48.00-50.00 sq.m. Staff 4.00-6.00 sq.m./pax Conference Room 1.20 sq.m./pax Toilet/Bathroom (T&B) 3.75-4.00 sq.m. Pantry 10.00 sq.m. Storage Area 10.00 sq.m. 2. Vice Mayor's Office 40.00-48.00 sq.m. Staff 4.00-6.00 sq.m./pax Conference Room 1.20 sq.m./pax T&B 3.75-4.00 sq.m. Pantry 8.00-10.00 sq.m. Storage Area 8.00-10.00 sq.m. 3. Municipal Administrator Chief's Office = 12.00 sq.m.; staff = 4.00-6.00 sq.m./pax; storage area = 6.00 sq.m. 4. Office of the Sangguniang Bayan (SB) SB/SK Member Cubicle/ SB Members Office = 9.00-12.00 sq.m.; SK Members staff = 4.00-6.00 sq.m./pax; SB Secretariat storage area = 6.00 sq.m.; Toilet 3.00-4.00 sq.m. Storage Area 8.00-10.00 sq.m. 5. Session Hall 1.40 sq.m./pax 6. Municipal Planning & Chief's Office = 12.00 sq.m.; Development Office staff = 4.00-6.00 sq.m./pax; storage area = 6.00 sq.m. 7. Municipal Engineer's Office Chief's Office = 12.00 sq.m.; staff = 4.00-6.00 sq.m./pax; storage area = 8.00-10.00 sq.m. 8. Municipal Social Welfare & Chief's Office = 12.00 sq.m.; Development Office staff = 4.00-6.00 sq.m./pax; storage area = 6.00 sq.m. 9. Municipal Budget Officer Chief's Office = 12.00 sq.m.; staff = 4.00-6.00 sq.m./pax; storage area = 6.00 sq.m. 10. Municipal Treasurer's Office Chief's Office = 12.00 sq.m.; staff = 4.00-6.00 sq.m./pax; storage area = 6.00-8.00 sq.m.; vault room/sto. = 6.00-8.00 sq.m. 11. Municipal Accounting Office Chief's Office = 12.00 sq.m.; staff = 4.00-6.00 sq.m./pax; storage area = 6.00-8.00 sq.m. 12. Municipal Legal Officer -do- 13. Municipal Assessor's Office -do- 14. Municipal Agricultural -do- Services 15. Municipal Disaster Risk -do- Reduction Management Office (MDRRMO) 16. Municipal Post Office Chief's Office = 12.00 sq.m.; staff = 4.00-6.00 sq.m./pax; storage area = 6.00-8.00 sq.m. 17. Municipal Trial Court MTC Judge Room 12.00-16.00 sq.m. Court Room 30.00-40.00 sq.m. Staff 4.00-6.00 sq.m./pax Pantry 6.00-8.00 sq.m. Toilet 3.00-4.00 sq.m. Storage Area 8.00-10.00 sq.m. 18. Extension Offices of National 4.00-6.00 sq.m./pax; Government Agencies, e.g.,: (subject for verification) storage area = 5.00-6.00 sq.m. DILG COMELEC BIR (DOF) Multi-Purpose Building/Public Gymnasium Design: Particulars Recommended Space/Area Requirements Equipment Storage Room 3.75 m x 8.8 m 33.00 sq.m. Female Locker & Shower Room 3.75 m x 5.00 m 18.75 sq.m. Female Toilet 3.75 m x 5.00 m 18.75 sq.m. PWD Toilet 2.00 m x 2.00 m 4.00 sq.m. Male Toilet 3.75 m x 5.00 m 18.75 sq.m. Male Locker & Shower Room 3.75 m x 4.2 m 15.75 sq.m. Basketball Court 28.00 m x 14.00 m 392.00 sq.m. Stage 4.00 m x 11.2 m 44.80 sq.m. Circulation and Bleachers -- 506.9 sq.m. Total -- 1,052.7 sq.m. ============== =========== NOTE: For determining the seating capacity of a stand/bleacher, the width of any seat shall not be less than 450 millimeters nor more than 480 millimeters (per Section 1207, Rule XII General Design and Construction Requirements, Revised IRR of P.D. No. 1096). PUBLIC MARKET DESIGN: Site Selection Site selection for public markets will primarily consider the physical site condition, availability of infrastructure/utilities, accessibility and location with respect to the population or service center. ISAcHD Location and Topography Public markets shall be located in sites determined in accordance with the National Building Code of the Philippines (P.D. No. 1096) and its Revised Implementing Rules and Regulations (IRR), concerned LGU's zoning laws/ordinances. Site location should be within designated commercial zone/area and accessible, preferably through an arterial street. Service access for trucks is essential for the delivery of goods and other services. The market site shall be located at least 50m away from schools, religious institutions, public offices, funeral establishments and other public gathering/places such as auditorium, public plazas and 25m away from abattoirs and sources of contamination. The market should be located at a site which is accessible by walking (0.75km) or an average of 15-minute travel time by public vehicles. The market site should have an adequate size and suitable shape to allow proper area and space for expansion. Infrastructure/facilities ( e.g. , electricity, water supply, telecommunications, etc.) shall be available at the proposed sites. If located near rivers, streams or lakes, the easement shall be in accordance with the Water Code of the Philippines (R.A. No. 1067). Market Lot Use Use the following guide for land use allocation and market lot area: IDETCA Building Area: 50 to 70%; and Space: 30 to 50%. - Based on the above guidelines, the maximum use of building area is 70% of the market area and market building basically consists of stalls (area) and related offices and facilities. The open spaces will be used for loading and unloading purposes, parking area and maintenance. - Landscaping and Buffering. The market complex needs sufficient landscaping and buffering. A minimum of 5.00m for this purpose may be provided along perimeter of the site. Building Structure and Architectural Standard All market buildings shall be designed in accordance with the provisions of P.D. No. 1096 and its Revised IRR. New market buildings shall be constructed in an orientation such as no side must be directly east or west to avoid glare to shoppers. If possible, a North-South or Northeast-Southwest orientation (second is the best choice) of the market building should be adopted. The building shall be properly oriented in such a way that the prevailing breeze blows at a right angle to the building walls. The following are the approximate building area distribution by percentage: EcTCAD Selling Area: 55 to 60% ; Circulation: 35 to 40% ; and Facilities (Toilets and Utility Rooms) and Offices: 5 to 10% . The market building shall be designed and constructed to allow adequate natural light and ventilation. To ensure cleanliness and sanitation, adequate supply of water and a good drainage system shall be provided. The design shall be open and flexible for future renovation. The structure shall be designed and constructed to withstand tropical typhoon and earthquakes. The market height level shall be 4.50m. This is measured from the floor level to the top of the roof beam or bottom of the truss. Accessibility facilities and features for persons with disabilities (PWDs), as provided under the Accessibility Law (B.P. Blg. 344), shall be integrated in the design. Water Supply Potable water supply should be adequate to keep the market clean. The fish and eatery section shall have one 12mm faucet in each stall. The meat and vegetable sections shall have at least one 12mm faucet for every five (5) stalls. Furthermore, comfort rooms and cold storages should be provided with water. ISAaTH Drainage and Sewage Facilities Sewage shall be disposed to a public sewerage system or in the absence thereof, in a manner complying with Chapter XVII Sewage Collection and Disposal, Excreta Disposal and Drainage of the Sanitation Code of the Philippines (P.D. No. 856) and its IRR. There shall be sufficient facilities in the market and its premises. At least one floor drain shall be provided in every 46.50 sq.m. of floor area. Slope shall not be less than 20.50mm per meter to the drainage outlet. The fish and meat sections should be provided with ample catch basins for retention of solids. Sewer lines from toilets and urinals shall not be connected with drainage lines in the market. All floor drains shall be provided with a deep seal trap (P-trap or U-trap). Waste Disposal Proper solid waste management shall be instituted in the market in accordance with the pertinent provisions of Chapter XVIII 'Refuse Disposal' of P.D. No. 856 and its IRR. On market premises, adequate number of refuse bins (separate bin or bins with separator) or refuse depository, one for biodegradable and one for non-biodegradable wastes, shall be provided in strategic places for temporary disposal of refuse before being collected. Each stall shall be provided with at least two (2) covered refuse receptacles lined with green-colored plastic bag for biodegradable and another receptacle line with black-colored plastic bag for non-biodegradable wastes. EcTIDA Electrical Power Supply Power supply shall be connected to an approved public or community power supply system. A standby generator must be provided in case of power failure. Guidelines for the design and installation of an electrical system shall be in accordance with the latest Philippine Electrical Code (PEC). Telecommunication Supply Telecommunication supply shall be connected to an approved public or local Telecommunication exchange company. Guidelines for the design and installation of the telecommunication system shall be in accordance with the local Electronics and Communication Laws and Code. Fire Protection System An adequate fire protection system should be installed providing for fire hydrants and rising mains with pipe hydrant outlets connected directly to the main distribution line. Fire hydrants should likewise be visibly and accessibly installed or provided outside market buildings. Fire hydrants inside market building should be provided with fire hose cabinets and should be unobstructed from internal traffic circulation. A portable fire extinguisher is recommended for every market stall, except wet and semi-wet. CcAITa Road Network and Pedestrian Walk Intersection of major pedestrian and vehicular flows should be minimized. Loading and unloading areas should be located as near as possible to the market but should not influence traffic congestion to the main roads. Customers and service access and circulation must be separated. Pedestrian walks should likewise be isolated from vehicular traffic and protected from weather elements. Long walks should as much as possible be discouraged. Priority should be given to market-goers availing of public transportation modes. The road system should be provided with safe and convenient ingress and egress from the site to a collector street or feeder road. If this has to connect to an arterial road, provision of service road is recommended. Market roads shall be at least two (2) lanes or at least 7.00m in carriageway width ( i.e. , excluding sidewalks). Road intersections must be properly designed to minimize traffic congestion in the vicinity of the market. Parking and Delivery Area The provisions of adequate parking area is a basic requirement of any market, regardless of its size and location (reference to P.D. No. 1096). The location of the parking area is generally between the stores and the streets that it will be away from the pedestrian areas. ITECSH For planning purposes, it may be assumed that for every 100 sq.m. of leasable (stalls) floor area, four (4) parking spaces (both for consumers and stallholders) with an area of 2.50m by 5.00m shall be provided. Parking is recommended on the lowest level of the public market. Off-street parking is not encouraged since it contributes to traffic congestion. The hawker's plaza and 'bagsakan' (wholesale) area are places near the semi-wet and dry sections for the convenience of both vendors and delivery vans, most of which supply goods such as groceries and sari-sari items (different/wide variety of goods). It is recommended that the hawker's plaza should not exceed 60% of the size of the market core, except for those markets which may have only one or two market per week. The 'bagsakan' (wholesale) area is computed at around 10% to 13% of the total built-up area. Market Stalls and Aisles A public market basically consists of stalls and aisles. A stall is the most important element of the market. In detailed design, great care must be exercised in analyzing the needs of vendors, particularly in the case of the net stalls. The required stall area for a market must be about 60% of the total floor area. The circulation area, which is the aisle, is 35% and the offices, toilets and utility room at 5% of the total floor area. For planning purposes, the average sizes of the different market stalls may be assumed at: EAHDac 2-4 sq.m. per stall for vegetables, fruits, meat and dried fish; 5-9 sq.m. per stall for shops and sari-sari (general) store; and 15-18 sq.m. for carinderia (eatery) and cereals. For purposes of preliminary programming, the following illustrate the above applications: 1.70m x 2.25m or 3.80 sq.m. for meat and vegetables; 1.70m x 2.25m or 3.80 sq.m. for fruits and vegetables; 3.40m x 4.50m or 15.30 sq.m. for cereals and carinderia (eatery); 2.25m x 3.41m or 7.67 sq.m. for shops and sari-sari (general) store; and 2.27m x 4.49m or 10.19 sq.m. for garments. Recommended stall sizes should be matched with existing stall sizes and should be related to the market vendor analysis. Any deviations from the recommended stall sizes should be done in increments/multiples of 1.44 sq.m. (1.20m x 1.20m) or even fractions (1/2, 1/4, 1/8, 1/16). The counter aisle should be at 1.50-2.00m wide while the primary and secondary entry aisles may be assumed at 2.00-3.50m wide. DCAHcT Comfort Rooms and Hand-Washing Facilities The public comfort rooms shall be adequately and strategically located within the market area. One (1) toilet stall and a wash-hand basin for personnel and stallholder's use and the same ratio for the consumers' use may be allocated for every 50 market stalls. Seventy percent (70%) of the toilet facilities may be allocated for women since approximately 70% of the market-goers are women. Offices The Administrative Office must be situated at a strategic point wherein it can control deliveries and at the same time watch over market operation. It will provide office space for the market administrator, chief teller, vendor's association and conference room. The office space shall be 4.2 sq.m. per person. This office can be located in any part of the market building or an independent small building. A small mezzanine floor for administration office located at the center of the proposed market building is highly recommended. Maintenance Room This room serves as the locker room for the security and maintenance staff. It may be adjacent to the administration office. Structural Design Standard The structural design must be in accordance with the latest edition of the National Structural Code of the Philippines (NSCP), Volume 1, 2010 and P.D. No. 1096, the 1977 NBCP and its 2004 Revised IRR. AcSIDE All concrete materials and workmanship shall conform to the latest building code of American Concrete Institute (ACI-138) while steel construction will be based on AISC Manual. The Structures shall be designed to have a life to last at least fifty (50) years. Classification of Structures Excerpt from the NSCP 2010, the Public buildings/structures shall be designed for the classification as follows: Occupancy Category Occupancy or Functions Public School Buildings, Fire & Essential Facilities Police Stations, Aviation Control towers, Hospitals, Evacuation Centers Municipal Buildings, Covered Standard Occupancy Court, Multi-Purpose Building, Housing, Public Market I. Loadings Wind Load The public buildings/structures, roofing systems and walls shall be designed with the basic wind speed: Zone Basic Wind Speed Zone I 250 kph Zone II 250 kph Zone III 150 kph The importance factor for wind design shall be based from the occupancy category of the buildings. Occupancy Category Importance Factor Essential Facilities 1.15 Standard Occupancy 1.00 The structure should be fully sealed against rainwater intrusion during typhoons and heavy rains. All openings such as doors and windows must be fully sealed against strong vertical and lateral rains. IcSEAH Seismic Load Seismic load is defined as the horizontal and vertical forces equivalent in their design effect to the loads induced by ground motion during an earthquake. Building structures shall be designed for seismic loads in accordance with NSCP 2010 Section 208. The Philippines have two (2) seismic zones. The provinces of Palawan, Sulu and Tawi-Tawi are under the Zone 2 while the rest of the Philippines are Zone 4. The public buildings/structures in the Philippines shall be designed to withstand earthquakes with corresponding seismic zone factor of 0.20 for Zone 2 and 0.40 for Zone 4. The location and type of the seismic sources should also be defined and near source factors (N a &N v ) should be considered (NSCP 2010 Section 208.4.4.4) . A Seismic Importance Factor shall be used for the effect of the nearby fault lines. Occupancy Category Importance Factor Essential Facilities 1.50 Standard Occupancy 1.00 The default soil profile type SE for earthquake load computation purposes shall be used in the absence of geotechnical report. HcDSaT Live Load The live loads shall be the weight of all movable loads including personnel, tools, miscellaneous equipment, and movable partitions. The minimum occupancy or live loads shall be used in the design from the recommended values of the NSCP 2010. Structure Part Live Load Offices 2.4 kPa Schools (Classrooms) 1.9 kPa Restrooms 2.4 kPa Roof decks Same as area served Corridors above ground floor 3.8 kPa Lobbies & ground floor corridors 4.8 kPa Hospitals (wards & rooms) 1.9 kPa Hospitals (Laboratories & 2.9 kPa operating rooms) Exit facilities 4.8 kPa Stores - Wholesale 6.0 kPa Assembly Areas & Auditoriums 2.9 kPa (movable seats) Excerpt from NSCP 2010 Table 205-1 Roof live loads will be as per recommended by the NSCP 2010 Table 205-3. For the design of the roof truss, a 0.60 kPa will be used due to the large tributary area of the roof. Dead Load Dead Load shall be the weight of materials forming the permanent part of a building, built-in partitions, equipment, insulation, piping, electrical conduit and other permanent fixtures. Material Unit Weight Concrete 24 kN/m 3 Steel 77 kN/m 3 150mm (6") thick CHB 2.73 kPa 100mm (4") thick CHB 2.11 kPa Wall Plaster 0.24 kN/m 3 II. Materials & Design Stresses Structural Concrete All concrete shall develop a minimum compressive strength at the end of twenty eight (28) days with corresponding maximum size aggregate and slumps as follows: HAEDIS Location 28 Days Maximum Maximum Slump Strength Aggregate Size Foundation, Elevator shaft, columns, slab & 20.7 MPa 3/4 inch (19mm) 4 inches (100mm) beams Slab on grade 17.2 MPa 3/4 inch (19mm) 4 inches (100mm) Reinforcing Steel Bars All reinforcing steel bars shall be hot-rolled non-weldable deformed, new billet bars conforming to ASTM A615 Grade 33 for 12mm diameter and smaller bars while Grade 40 for 16mm diameter and larger. Steel reinforcement shall be free from loose mill and rust scale and from coating that may destroy or reduce the concrete-steel bond. The elastic modulus of reinforced steel bars to be used for analysis purpose is 200,000 Mpa. Concrete cover shall be provided for protection of reinforcement as per NSCP Section 407.8. The following are the minimum concrete cover for nonprestressed cast-in-place concrete. Usage/Purpose Minimum Cover Footing and base slabs at uniform surfaces and 75mm bottom in contact with earth Formed Concrete surfaces exposed to earth, water or weather: 20mm diameter bar and larger 50mm 16mm diameter bar and smaller 40mm Concrete not exposed to weather or in contact with ground Slabs, walls, joists 42mm & 58mm diameter 40mm 36mm diameter and smaller 20mm Beams and columns 40mm Structural Steel and Cold Formed Sections All structural steel such as trusses, beams, columns, bracings, struts, etc. shall have a minimum yield strength of 248 MPa (36,000 psi) conforming with standards for Rolled Structural Steel Sections as per ASTM A36. ACETID High strength connection bolts shall conform to ASTM A325 while anchor bolts shall conform to ASTM A307. Steel Sections for purlins and girts shall be as per JIS G#101 with yield strength of 245 MPa. All welding shall have E70xx conforming to specifications in the AWS section D1.1. Masonry and Concrete Blocks All non-load bearing type concrete blocks shall have a minimum compressive strength of 2.40 MPa while 6.90 MPa shall be developed for load bearing type of concrete blocks. Building Foundation Prior to the design/construction of the building, a soil investigation should be conducted for the basis of the foundation and structural design of the buildings/structures. For two stories and higher structures, an exhaustive geotechnical study is recommended as per NSCP 2010 Section 303. If the actual soil bearing pressure is unknown, an allowable soil bearing pressure of 96 Kpa (2,000 psf) should be assumed for the design. In case the actual soil bearing pressure is found less than or greater than the assumed value, notify the designer for a proper revision of the foundation design. aCSHDI Electrical Design Standards Roughing-ins Service Entrance Service entrance conduit shall be made of Rigid Steel or Intermediate Metallic for conductors with insulation and rigid non-metallic (non-combustible, non-absorbent insulating tubes) for open conductors. Underground conduit runs shall be encased in concrete envelope or with reinforced steel when crossing roadway. Service conduit that are not encased in concrete and that are buried 460mm or more below grade shall have their location identified by a warning ribbon that is placed in the trench at least 300mm above finished grade. Ends of conduits shall be provided with sealing compound to prevent entrance of liquids or white ants. Exposed service entrance conduits shall be painted with epoxy primer in three (3) coats application. Conduit shall be properly cut square, reamed and threaded. Electric Service Metering equipment shall be installed at a minimum height of 1600mm from the natural grade line to the center of the equipment. Branch circuit conduits, boxes, fittings and supports shall run parallel to walls and beams of the building. Metal boxes, gutters, supports and fittings shall be painted with epoxy primer in three (3) coats prior to installation. Polyvinyl Chlorine (PVC) solvent shall be applied on all PVC pipe joints/connections. cDTHIE End bells shall be used at the end of PVC pipes and locknut and bushing shall be used for metallic conduit on all boxes and gutters termination. Branch circuit conduits shall be either rigid metallic or rigid non-metallic as applicable. Ceiling mounted lighting fixture: Flexible metallic tubing shall be used as drop pipe from junction box to octagonal box. In-sight disconnecting means: Watertight type straight or angle connectors shall be used for pumps, condensing units and other equipment that will be in possible contact with water or rain. Panel boards and enclosed circuit breakers shall be used to protect the electrical systems from overloading. Stub-out conduits for spares: 15mm nominal diameter non-metallic or metallic shall be provided as stub-out conduits at different panel board as per schedule of loads and computation. Ends shall be threaded and capped. Wires and Wiring Devices Wires shall be properly designed in accordance with the allowable ampacities of insulated conductors provided by Philippine Electrical Code (PEC) Article 3.10. Grounding wires shall conform to Article 2.50 of the PEC. Wiring devices such as wall switches, duplex or single convenience/receptacle outlets, and other power outlets shall be of modern type and of the approved type for both location and purpose. CDHAcI Receptacles and other power outlets Duplex or single convenience/receptacle and power outlets of the grounding type shall be provided in all rooms/enclosed spaces where it is required. Lighting Fixtures Each room or enclosed space shall be provided with a lighting product(s) that can produce the required illumination level to wit: Room/Area to be Illuminated Lux (Lumens/m 2 ) I. For Municipal Building Offices Drafting Room Detailed drafting and designing, cartography 2200 Rough layout drafting 1600 Accounting offices Auditing, tabulating, bookkeeping, business machine operation, computer operation 1600 General offices Reading poor reproduction, business machine operation, computer operation 1600 Reading handwriting in hard pencil on poor paper, reading fair reproduction, active filing, mail sorting 1100 Reading handwriting in ink or medium pencil or good quality paper, intermittent filing 750 Private offices Reading poor reproductions, business machine 1600 operation Reading handwriting in hard pencil on poor paper, reading fair reproductions 1100 Reading handwriting in ink or medium pencil on good quality paper 7500 Reading high contrast or well-printed materials 330 Conferring and interviewing 330 Conference room Critical seeing task 1100 Conferring 330 Note-taking during projection (variable) 330 Corridors 220 Police Identification 1600 Jail cells and interrogation rooms 320 Fire hall Dormitory 220 Recreation room 320 Wagon room 320 II. For Multi-Purpose Buildings Auditoriums Assembly only 160 Exhibitions 32 Social activities 50 Gymnasiums Exhibitions, matches 540 General exercising 320 Assemblies 110 Dances 50 Lockers and shower rooms 220 Basketball College and professional 540 College intramural and high school 320 Recreational (outdoor) 110 III. For Public Market Stores/Stalls Circulation areas 320 Merchandizing areas Service 1100 Stockrooms 320 IV. For all areas Service space Stairways, corridors 220 Elevators, freight and passenger 220 Toilets and wash rooms 320 Mechanical Design Standards Air Conditioning System Rooms/enclosed spaces where temperature and relative humidity of the air for comfortable cooling shall be maintained at 20-24C and 50-55% humidity, respectively at an air movement from 4.57 to 7.6m/min within living zone, air conditioning system shall be provided. Ventilation System The quantity of air to be exhausted in a given room/enclosed area is based on the number of air changes per hour. Storage room Ventilation by gravity shall have grilles in the doors or partitions leading into corridors. Top grilles shall have total free area of 6800sq.mm. per sq.m. of floor area. Toilets Gravity ventilated toilets shall have exhaust ducts and inlet exhaust grilles with free areas of 0.093m 2 for two fixtures plus 0.031m 2 for each additional fixture. Apply 50 cubic feet per min (50CFM) per fixture bowl/urinary bowl or 4 to 6 air changes per hour on excessive area of the toilets. SAcCIH Water Pumping System A shut-off valve shall be placed at the suction and at the discharge side of the pump and check valves shall be provided at the pump discharge and before the shut-off valve. Overhead tank supply shall be provided with float switch or other device to start and stop operation of pump. Overhead water tank shall be provided with air vent and an over-flow pipe leading to a storm drain. Pneumatic tank shall be provided with suitable pressure switch and air volume control device to maintain correct air volume inside the tank. Tank with a capacity of 3785 litres or more shall be provided with air compressor. Tank shall be designed for twice the maximum total dynamic pressure required. All piping 102mm and above shall be flanged while smaller sizes can be screwed. All piping subject to varying temperature shall be provided with expansion joints. All piping shall be clamped by 20" bolts or clamps to supporting racks except steam piping. AacCIT Fire Protection System Fire Sprinkler System Pipes and tubes used in sprinkler system shall be designed to withstand a working pressure of not less than 1206 kilopascals. All pipes shall be provided with protective coating where corrosive fumes or moisture conditions exist. Mechanical groove coupling sleeves and sway bracing shall be provided to prevent pipe breakage. Drain valves and test valves shall be provided. Check valves shall be installed on a vertical or horizontal position. Valves controlling sprinkler system shall be provided. Sprinkler piping shall be substantially supported from the building structure. Flushing shall be made with a flow of not less than 2836 litres for 152mm pipe, 3785 litres for 203mm pipe, 5678 litres for 254mm pipe and 7570 litres for 305mm pipe. Hydrostatic test shall be made of not less than 1378 kilopascals for @2 hours." All concerned are hereby enjoined to be guided accordingly and give this Circular a wide publicity as possible. ISDCaT (SGD.) KIM S. JACINTO-HENARES Commissioner of Internal Revenue