Full text of the National Building Code of the Philippines (Republic Act No. ) - Featured on the Internet by the Chan Robles Virtual Law Library. structure as provided for in the National Building Code; building rules and . National Building Code PD - ronaldweinland.info . Emerging Issues Download as PPTX, PDF, TXT or read online from Scribd . RA entitled An Act to Ordain and Institute a National Building Code of the Philippines was passed by the defunct congress in .. _LFD_Retaining_Walls_Sept_ .pdf.
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WHEREAS, while there is Republic Act No. , entitled "An Act to. Ordain and Institute a National Building Code of the Philippines", the same does not. REGULATIONS. OF THE. NATIONAL BUILDING CODE. OF THE PHILIPPINES. ( PD ). OFFICIAL TEXT. REVISED EDITION. INCLUDES. • NBCDO. Implementing Rules and Regulations of the National Building Code of the Philippines (PD). It appears your Web browser is not configured to display PDF.
The organizational structure and the machinery conceived in the code to oversee the implementation of its provisions were vested in the Joint Building and environmental Planning Research and Standards Commission. When the martial law was declared on September 21, , the enforcement and administration of RA was deemed nullified with the abolition of congress from which most of the Commission s membership was drawn. The formation and adoption of an up-to-date National Building Code was therefore one of the imperatives of time and necessity. All buildings or structures. Buildings or structures and all parts thereof.
Unless your community has adopted the latest model building code, including its seismic provisions, new structures in your community will probably not provide the current minimum level of protection from earthquake hazards to you and others who use them. How Are the Codes Enforced?
Adopting the latest building codes is only part of the solution. Codes must also be effectively enforced to ensure that buildings and their occupants benefit from advances in seismic provisions in the model codes. For the most part, code enforcement is the responsibility of local government building officials who review design plans, inspect construction work and issue building and occupancy permits. What about Older Buildings? Except in certain circumstances, such as when a building is significantly renovated or altered or there is a change in its use that triggers the IBC or IEBC, the code requirements for existing buildings are those that were in effect when the structure was designed and constructed.
Your community probably has many older structures that are not protected against earthquakes. This is because buildings are often used for decades before being replaced or substantially altered.
These existing buildings are the single biggest contributor to seismic risk in the United States today. Damage to older, reinforced concrete building in the Northridge Earthquake.
Clark and Regents of the University of California. Seismic retrofitting of a building must also include steps to better protect non-structural components suspended ceilings, non-load-bearing walls and utility systems and building contents furnishings, supplies, inventory and equipment.
Reducing the Risks of Non-Structural Earthquake Damage FEMA E was recently updated and is an excellent resource for information on mitigating risk to non-structural components and contents. Rule 11b. Application to Trade.
Rule 12a. Shipments not complying with national regulations shall be disposed according to policies established by the DA and the DOH; and Rule 12b. Rule 12b. The notification shall be called the Import Notification Document IND and shall contain among others, the information needed by the DA or the DOH to determine whether or not the food will require physical inspection on arrival. If a shipment requires testing, it may be held at the port or transferred to another location.
The physical transfer of the shipment while awaiting laboratory testing is not an indication that the shipment has been cleared for entry. Where no standards exist in the country of origin, the FSRAs of the country of origin or the importer shall demonstrate that the shipment was produced under a food safety regime equivalent to national standards.
The inspection and clearance procedures shall be conducted by the DA and the DOH within their respective jurisdiction. Returned shipments shall undergo border inspection clearance as provided in Section 12 b hereof. Rule 12c. Principal Responsibility of Food Business Operators.
Rule Specific Responsibilities of Food Business Operators. They shall adopt, apply and be well informed of codes and principles for good practices. Micro and small industries shall be assisted to facilitate their adoption of such practices; Rule 14a. Rule 14a. Graduates of other courses must have work experience on food safety. The FBOs shall ensure that such food is not adulterated, contaminated, misbranded, and misleading. FBOs shall monitor the performance of control measures and maintain monitoring records as a matter of routine practice.
They shall also report any incident that indicated that the said product has caused or contributed to the death, serious illness or serious injury to a consumer or any person. Rule 14b. Rule 14c. The actions undertaken shall be subject to verification by the FSRA. Rule 14d. Principal Responsibilities of Government Agencies.
Primary production refers to the production, rearing or growing of primary products including harvesting, milking and farmed animal production up to slaughter, and the rearing and growing of fish and other seafood in aquaculture ponds. Rule 15a. Postharvest stages involve minimal transformation of plant and animal foods after primary production such as removal of field heat for fruits, slaughter of animals, sorting, grading and cutting of fresh plant and animal foods, icing and freezing, and the milling and storage of grain.
Rule 15b. The processing stage of the food supply chain is that stage that substantially alters the initial raw materials or product or ingredients including, but not limited to, heating, smoking, curing, maturing, drying, marinating, extraction, extrusion and a combination of those processes intended to produce food.
The LGU shall also be responsible for street food sale, including ambulant vending; Rule 15c. They shall be guided by national regulations. Rule 15c. Rule 15e. Rule 15f. Rule 15g. Monitoring shall be used among others, to determine the effectiveness of the food safety regulatory system. Specific Responsibilities of the Department of Agriculture. It shall monitor and ensure that the relevant requirements of the law are complied with by farmers, fisher folks and food business operators.
Pursuant thereto, the DA Secretary shall ensure that the food safety regulatory mandates and functions for fresh plant, animal, fisheries and aquaculture foods of the DA agencies are clearly defined. The maximum rise from one row of seats to the next shall not exceed 40 centimeters 16 inches. For determining the seating capacity of a stand, the width of any seat shall be not less than 45 centimeters 18 inches nor more than 48 centimeters 19 inches.
The number of seats between any seats and an aisle shall not be greater than 15 for open air stands with seats without backrests; 9 for open air stands with seats having backrest in buildings, and 6 for seats with backrest in building.
Aisles shall be provided in all stands: Except, That aisles may be omitted when all the following conditions exists: Seats are without backrest; the rise from row to row does not exceed 30 centimeters 12 inches per row; the number of rows does not exceed 11 in height; the top seating board is not over 3.
No obstruction shall be placed in the required width of any aisle or exitway. When an aisle is elevated more than 20 centimeters 8 inches above grade, the aisle shall be provided with a stairway or ramp whose width is not less than the width of the aisles.
No vertical aisle shall have a dead and more than 16 rows in depth regardless of the number of exits required. Aisles shall have a minimum width of 1. The requirements in this Code shall apply to all stairs and ramps except for portions that pass through the seating area.
The maximum rise of treads shall not exceed 20 centimeters 8 inches and the minimum width of the run shall be 28 centimeters 11 inches. The slope of ramp shall be of approved nonslip material. A ramp with a slope exceeding 1 in 10 shall have handrails. Stairs for stands shall have handrails. Handrails shall conform to the requirements of this Code. Where only sections of stands are used, guardrails shall be provided as required in this Code. Except, That the height may be reduced to 90 centimeters 3 feet for guardrails located in front of the grandstand.
The intervening space shall have one additional rail midway in the opening: Except, That railings may be omitted when stands are placed directly against a wall or fence giving equivalent protection; stairs and ramps shall be provided with guardrails. Handrails at the front of stands and adjacent to an aisle shall be designed at resist a load of 74 kilograms per linear meter 50 pounds per linear foot applied at the top rail.
Other handrails shall be designed at resist a load of 9 kilograms 20 pounds. Footboards shall be provided for all rows of seats above the third row, or beginning at such point where the seating plank is more than 60 centimeters 2 feet above grade. The line of travel to an exit shall be not more than For stands with seats without backrests this distance may be measured by direct line from a seat to the exit from the stand. An aisle may be considered as only one exit unless it is continuous at both ends to a legal building exit or to a safe dispersal area.
A stand with the first seating board not more than 50 centimeters 20 inches above grade of floor may be considered to have two exits when the bottom of the stands is open at both ends. Every stand or section of a stand within a building shall have at least two means of egress when the stand accommodates more than 50 persons.
Every open air stand having seats without backrest shall have at least two means of egress when the stand accommodates more than persons. Three exits shall be required for stands within a building when there are more than occupants within a stands, and for open air stands with seats without backrests where a stand or section of a stand accommodates more than occupants.
Four exits shall be required when a stand or section of stand accommodates more than occupants. Except, That for an open air stand with seats without backrest four exits need not be provided unless there are accommodations for more than occupants. The total width of exits in meters shall be not less than the total occupant load served divided by by 50 in feet: Except, that for open air stands with seats without backrests the total width of exits in meters shall be not less than the total occupant load served divided by in feet when exiting by stairs, and divided by by in feet when exiting by ramps or horizontally.
When both horizontal and stair exits are used, the total width of exits shall be determined by using both figures as applicable. No exit shall be less than 1. Exits shall be arranged a reasonable distance apart. When but two exits are provided, they shall be spaced not less than one-fifth of the perimeter apart. Chairs and benches used on raised stands shall be secured to the platform upon which they are placed: Except, That when less than 25 chairs are used upon a single raised platform the fastening of seats to the platform may be omitted.
When more than loose chairs are used in connection with athletic events, chairs shall be fastened together in groups of not less than three, and shall be tied or staked to the ground. Each safe dispersal area shall have at least two exits. If more than persons are to be accommodated within such an area, there shall be a minimum of three exits, and for more than persons there shall be a minimum of four exits. The aggregate clear width of exits from a safe dispersal area shall be determined on the basis of not less than one exit unit 56 centimeters 22 inches for each persons to be accommodated and no exit shall be less than 1.
Exits shall be a reasonable distance apart but shall be spaced not less than one-fifth of the perimeter of the area apart from each other. Frames of skylights shall be designed to carry loads required for roofs. All skylights, the glass of which is set an angle of less than 45 degrees from the horizontal, if located above the first story, shall be at least 10 centimeters 4 inches above the roofs.
Curbs on which the skylight rests shall be constructed of incumbustible materials except for Type I or II constructions. Corrugated wired glass may have supports 1.
All glass in skylights shall be wire glass: Except, That skylights over vertical shafts extending through two or more stories shall be glazed with plain glass as specified in this Code: Provided, That wire glass may be used if ventilation equal to not less than one-eighth the cross-sectional area of the shaft but never less than 1.
Any glass not wire glass shall be protected above and below with a screen constructed of wire not smaller than 12 U. The screen shall be substantially supported below the glass. The use of wood in the frames of skylights will be permitted in greenhouses outside of highly restrictive Fire Zones if the height of the skylights does not exceeds 6.
Any such glass over square centimeters 16 square inches in area shall have wire mesh embedded in the same or shall be provided with a wire screen underneath as specified for skylights in this Code. All portions of the floor lights or sidewalk lights shall be of the same strength as required for floor or sidewalk lights shall be of the same strength as construction, except in cases where the floor is surrounded by a railing not less than 1.
The roof covering of a bay or oriel window shall conform to the requirements of the roofing of the main roof. Exterior balconies attached to or supported by walls required to be of masonry, shall have brackets or beams constructed of incombustible materials. Railings shall be provided for balconies, landings, or porches, which are more than 75 centimeters 2 feet, 6 inches above grade.
No penthouse or other projection above the roof when used as an enclosure for tanks or elevators which run to the roof and in all other cases shall be not extend more than 3. No penthouse, bulkhead, or any other similar projection above the roof shall be used for purposes other than shelter of mechanical equipment or shelter of vertical shaft openings in the roof.
A penthouse or bulkhead used for purposes other than that allowed by this Section shall conform to the requirements of this Code for an additional story. Roof structures constructed with walls, floors, and roof as required for the main portion of the building except in the following cases: The above restriction shall not prohibit the placing of wood flagpoles or similar structures on the roof of any building.
Towers or spires when closed shall have exterior walls as required for the building to which they are attached. Towers not enclosed and which extend more than No tower or spire shall occupy more than one-fourth of the street frontage of any building to which is attached and in no case shall the base area exceed square meters square feet unless it conforms entirely to the type of construction requirements of the building to which it is attached and is limited in height as a main part of the building.
If the area of the tower or spire exceeds The roof covering of the spires shall be as required for the main roof of the roof of the rest of the structure. Skeleton towers used as radio masts, neon signs, or advertisement frames and placed on the roof of any building shall be constructed entirely of incombustible materials when more than 7.
No such skeleton towers shall be supported on roofs of combustible framings. They shall be design to withstand a wind load from any direction in addition to any other loads. Chimneys shall be designed, anchored, supported, reinforced, constructed, and installed in accordance with generally accepted principles of engineering. Every chimney shall be capable of producing a draft at the appliance not less than the required for the safe operation of the appliance connected thereto.
No chimney shall support any structural load than its own weight unless it is designed to act as a supporting member. Chimneys in an wood-framed building shall be anchored laterally at the ceiling and each floor line which is more than 1. Every masonry chimneys shall have walls of masonry units, bricks, stones, listed masonry units, reinforced concrete or equivalent solid thickness of hollow masonry and lined with suitable liners in accordance with the following requirements: Masonry chimneys shall be constructed of masonry units or reinforced concrete with walls not less than 10 centimeters 4 inches thick or rubble stone masonry not less than 30 centimeters 12 inches thick.
The chimney linear shall be in accordance with this Code. Masonry chimneys shall be constructed of masonry units or reinforced concrete with walls not less than 20 centimeters 8 inches thick except that rubbles stone masonry shall be not less than 30 centimeters 12 inches thick. The chimneys linear shall be in accordance with this Code. Masonry chimneys for medium-heat appliances shall be constructed of solid masonry units of reinforced concrete not less than 20 centimeters 8 inches thick, except that stone masonry shall be not at less than 30 centimeters 12 inches thick and, in addition shall be lined with not less than 10 centimeters 4 inches of firebrick laid in a solid bed of fire clay mortar with solidity filled head, bed, and wall joints, starting not less than 60 centimeters 2 feet below the chimney connector entrance and extending for a distance of at least 7.
Chimneys extending 7. Masonry chimneys for high-heat appliances shall be constructed with double walls of sold masonry units of reinforced concrete not less than 20 centimeters 8 inches in thickness, with an air space of not less than 5 centimeters 2 inches between walls.
The inside of the interior walls shall be of firebrick not less than 10 centimeters 4 inches in thickness laid in a solid bid of fire clay mortar with solidly filled head, bed and wall joints. Chimneys for incinerators installed in multi-story buildings using the chimney passageway as a refuse chute where the horizontal grate area of combustion chamber does not exceed 0. If the grate area of such an incinerator exceeds 0.
Masonry chimneys for commercial and industrial-type incinerators of a size designed for not more than kilograms pounds or refuse per hour and having a horizontal grate area not exceeding 0. If the design capacity or grate area of such an incinerator exceed kilograms pounds per hour and 0.
The lining shall extend from 20 centimeters 8 inches below the lowest inlet or, in the case of fireplaces, from the throat of the fireplace to a point above enclosing masonry walls.
Fire clay chimney linings shall be installed ahead of the construction of the chimney as it is carried up, carefully bedded one on the other in fire clay mortar, with close-fitting joints left so smooth on the inside. Firebrick not less than 5 centimeters 2 inches thick may be used in place of fire clay chimney. No chimney passageway shall be smaller in area than the vent connection on the appliance attached thereto.
Every masonry chimney shall extend at least 60 centimeters 2 feet above the part of the roof through which it passes and at least 60 centimeters 2 feet above the highest elevation of any part of a building within 3. No masonry chimney shall be corbel from a wall more than 15 centimeters 6 inches nor shall a masonry chimney be corbeled from a wall which is less than 30 centimeters 12 inches in thickness unless it projects equally on each side of the wall.
In the second story of a two-story building of Group A Occupancy, corbeling of masonry chimneys on the exterior of the enclosing walls may equal the wall thickness. In every case the corbeling shall not exceed 2. No change in the size or shape of a masonry chimney where the chimney passes through the roof shall be made within a distance of 15 centimeters 6 inches above or below the roof joists or rafters.
When more than one passageway is contained in the same chimney, masonry separation at least 10 centimeters 4 inches thick bonded into the masonry wall of the chimney shall be provided to separate passageways. Combustible materials shall not be placed within 5 centimeters 2 inches of smoke chamber walls or masonry chimney walls when built within a structure, or with 2. Cleanout opening shall be provided at the base of every masonry chimney. Fireplaces, barbecues, smoke chamber, and fireplace chimneys shall be of solid masonry or reinforced concrete and shall conform to the minimum requirements specified in this Code.
Factory-built metal room heating stoves may be used in accordance with generally recognized engineering practices.
Walls of fireplaces shall be not less than 20 centimeters 8 inches in thickness. Walls of fireboxes shall be not less than 25 centimeters 10 inches in thickness: Except, That where a lining of firebrick is used such walls shall be not less than 20 centimeters 8 inches in thickness. The firebox shall be not less than 50 centimeters 20 inches in depth.
Metal hoods used as a part of a fireplace or barbecue shall be not less than No. The hoods shall be sloped at an angle of 45 degrees or less from the vertical and shall extend horizontally at least 15 centimeters 6 inches beyond the limits of the firebox. Metal hoods shall be kept a minimum of 40 centimeters 18 inches from combustion materials unless approved for reduced clearances.
Approved metal heat circulators may be installed fireplaces. Front and side walls shall be not less than 20 centimeters 8 inches in thickness. Smoke chamber back walls shall not be not less than 15 centimeters 6 inches in thickness. Walls of chimneys without flue lining shall be not less than 20 centimeters 8 inches in thickness. Walls of chimneys with flue lining shall be not less than 10 centimeters 4 inches in thickness and shall not be constructed in accordance with this Code.
Combustible material shall not be placed within 5 centimeters 2 inches of fireplace, smoke chamber, or chimneys walls when built entirely within a structure, or within 2.
In lieu of 2. Combustible materials shall not be placed within 15 centimeters 6 inches of the fireplace opening. No part of metal hoods used as part of a fireplace, barbecue, or heating stove shall be less than 40 centimeters 18 inches from combustible material. This clearance may be reduced to the minimum requirements set forth in this Code. The net cross-sectional area of the flue and of the throat between the firebox and the smoke chamber of a fireplaces shall be not less than the requirements according to internationally recognized and accepted principles of engineering.
Where dampers are used, they shall be of not less than No. When fully opened, damper openings shall be not less than 90 per cent of the required flue area.
When fully opened, damper blade shall not extent the line of inner face of the flue. Masonry over the fireplace opening shall be supported by an incombustible lintel. Every fireplace shall be provided with a brick, concrete, stone, or other approved incombustible hearth slab at least 30 centimeters 12 inches wider on each side than the fireplace opening and projecting at least 30 centimeters 18 inches therefrom.
This slab shall be not less than 10 centimeters 4 inches thick and shall be supported by incombustible materials or reinforced to carry its own weight and all imposed loads. Combustible forms and centering shall be removed. Where Required. Standard automatic fire-extinguishing systems shall comply with requirements of generally recognized and accepted practices and shall be installed in the following places: Every building six more stories in height shall be equipped with one or more dry standpipes.
Dry standpipes shall be of wrought iron or galvanized steel and together with fittings and connections shall be of sufficient strength to withstand 20 kilograms per square centimeter pounds per square inch of water pressure when ready for service, without leaking at the joints, valves, or fittings. Tests shall be conducted by the owner or his representative or contractor in the presence of a representative of the City or Municipal Fire Department whenever deemed necessary for the purpose of certification of its proper function.
Dry standpipes shall be of such size as to be capable of delivering liters gallons per minute from each of any three outlets simultaneously under the pressure created by one fire engine or pumper, based on the existing city equipment available.
The local Fire Department shall be consulted as to the proper size and threads of those connections. Every building six or more stories in height where the area of any floor above the fifth floor is square meters 10, square feet or less shall be equipped with not less than one dry standpipe and an additional standpipe shall be installed for each additional square meters 10, square feet or fraction thereof.
Standpipes shall be located within stairway landings or near such stairways as possible or immediately inside of an exterior wall and 30 centimeters 12 inches of an opening in a stairway enclosure of the balcony or vestibule of a smokeproof tower or an outside exit stairway.
Subject to the provisions of subparagraph 2 , all centimeter 4-inch dry standpipes shall be equipped with a two-way Siamese fire department connection. All All Siamese inlet connections shall be located on a street front of the building and not less than 30 centimeters 12 inches nor more than 1.
All Siamese inlet connections shall be recessed in the wall or otherwise substantially protected. All dry standpipes shall be extend from the ground floor to and over the roof and shall be equipped with a 6.
All dry standpipes shall be equipped with a two-way 6. All outlets shall be equipped with gate valves with substantial chains. An iron or bronze sign with raised letters at least 2. Every Group H and I Occupancy of any height and every Group C Occupancy of two or more stories in height, whose corridors are flanked on both sides, and every Group C Occupancy of two or more stories in height, whose corridors serve only one row of rooms on one side and with an open court on the other side, and every Group B, D, E, F, and G Occupancy of three or more stories in height and every Group G and E Occupancy over square meters 20, square feet in area shall be equipped with one or more interior wet standpipes extending from the cellar or basement into the topmost story: Provided, That Group H buildings having no stage and having a seating capacity of less than need to be equipped with interior standpipes.
Interior wet standpipes shall be constructed as required for dry standpipes. Buildings of Groups H and I Occupancies shall have wet standpipe systems capable of delivering the required quantity and pressure from any two outlets simultaneously; for all other occupancies only one outlet need be figured to be at one time.
In no case shall the internal diameter of a vet standpipe be less than 5 centimeters 2 inches , except when the standpipe is attached to an automatic fire-extinguishing system as set by the internationally recognized and accepted engineering practices. The Building Official may require delivery and pressure tests on completed wet standpipe systems before approving such systems. Wet standpipes shall be so located that any portion of the can be reached therefrom with a hose not exceeding In Groups H and I Occupancies, outlets shall be located as follows: Where occupant loads are less than the above requirements may be waived: Provided, That portable fire-extinguishers of appropriate capacity and type are installed within easy access from the said locations.
In Groups B, C, D, E, F, and G Occupancies the location of all interior wet standpipes shall be in accordance with the requirements for dry standpipes: Provided, That at least one wet standpipe is installed to cover not more than square meters square feet.
All interior wet standpipes shall be equipped with a 3. All hose threads in connection with the installation of such standpipes, including valves and reducing fittings, shall be uniform with that used by the local Fire Department.
All interior wet standpipes shall be connected to a street water main not less than 10 centimeters 4 inches in diameter, or when the water pressure is sufficient, to a water tank of sufficient size as provided in subparagraph 8.
When more than one interior wet standpipe is required in the building, such standpipes shall be connected at their bases or at their tops by pipes of equal size.
Tanks shall have a capacity sufficient to furnish at least liters gallons per minute for a period of not less than 10 minutes.
Such tanks shall be located so as to provide not less than Discharge pipes from pressure tanks shall extend 5 centimeters 2 inches into and above the bottom of such tanks. All tanks shall be tested in place after installation and proved tightly at a hydrostatic pressure 50 per cent in excess of the working pressure required. Where such tanks are used for domestic purpose the supply pipe for such purposes shall be located at or above the center line of such tanks.
Incombustible supports shall be provided for all such supply tanks and not less than centimeters 3-foot clearance shall be maintained over the top and under the bottom of all pressure tanks. Fire pumps shall have a capacity of not less than liters gallons per minute with a pressure of not less than The source of supply for such pump shall be a street water main of not less than centimeter 4-inch diameter or a well or cistern containing a one-hour supply.
Such pumps shall be supplied with an adequate source of power of the building and shall be automatic in operation. Each hose outlet of all interior wet standpipes shall be supplied with a hose not less than 3. Such hose shall be equipped with a suitable brass or bronze nozzle and shall be not over An approved standard form of wall hose reel or racks shall be provided for the hose and shall be located so as to make the hose readily accessible at all times and shall be recessed in the walls or protected suitable cabinets.
Basement pipe inlets shall be installed in the first floor of every store, warehouse, or factory where there are cellars or basements under same: Except, Where in such cellars or basements there is installed a fire-extinguishing system as specified in this Code, or where the cellars or basements are used for banking purposes, safe deposit vaults, or similar uses. All basement pipe inlets shall be of cast iron, steel brass, or bronze with lids of cast brass or bronze and shall consist of a sleeve not less than 20 centimeters 8 inches in diameter through the floor extending to and flush with the ceiling below and with a top flange, recessed with an inside shoulder, to receive the lid and flush with the finish floor surface.
The lid shall be a solid casting and have a ring lift recessed on the top thereof, so as to be flush. The lid shall be installed in such a manner as to permit its removal readily from the inlet.
Basement pipe inlets shall be strategically located and kept readily accessible at all times to the Fire Department. All fire-extinguishing systems, including automatic sprinkles, wet and dry standpipes, automatic chemical extinguishers, basement pipe inlets, and the appurtenance thereto shall meet the approval of the Fire Department of the particular municipality or city as to installation and location and shall be subject to such periodic tests as may require.
There shall be one or more ventilators constructed of metal or other incombustible material near the center and above the highest part of any working stage raised above the stage roof and having a total ventilation area equal to at least five per cent of the floor area within the stage walls.
The entire equipment shall conform to the following requirements: Ventilators shall open by spring action or force of gravity sufficient to overcome the effects of neglect, rust, dirt, or expansion by heat or warning of the framework. Glass, if used in ventilators, must be protected against falling on the stage. A wire screen, if used under the glass, must be so placed that if clogged it cannot reduce the required ventilating area of interfere with the operating mechanism or obstruct the distribution of water from the automatic fire-extinguishing systems.
Ventilators, penthouses, and supporting framework shall be designed in accordance with this Code. Each ventilator shall be arranged to open automatically after the outbreak of fire by the use of an approved automatic closing device as defined in this Code.
The fusible link and operating cable shall hold each door closed against a minimum This minimum counterforce shall be exerted on each door through its entire arc of travel and for a minimum degrees. A manual control shall be provided. Springs, when employed to actuate ventilator doors, shall be capable of maintaining full required tension indefinitely.
Springs shall not be stressed more than 50 per cent of their rated capacity and shall not be located directly in the air stream, nor exposed to the elements. A fusible link shall be placed in the cable control system on the underside of the ventilator at or above the roof line, and shall be so located as not to be affected by the operation of fire-extinguishing systems. Remote, manual, or electrical control shall provide for both opening and closing of the ventilator doors for periodic testing and shall be located at a point on the stage designated by the Building Official.
When remote control of ventilator is electrical, power failure shall not affect its instant operation in the event of fire. Hand winches may be employed to facilitate operation of manually controlled ventilators. Curbs shall constructed as required for the roof. Gridirons and fly galleries shall be designed to support a live load of not less than kilograms per square meter 75 pounds per square foot.
Each loft block well shall be designed to support The head block well must be provided with an adequate strongback of lateral brace to offset torque.
The sheave blocks shall be designed to accommodate the maximum load for the loft blocks or head blocks served with a safety factor of five. In buildings having a stage, the dressing room sections, workshops, and storerooms shall be located on the stage side of the proscenium wall and shall be separated from each other and from the stage by not less than a One-Hour Fire-Resistive Occupancy Separation. A stage shall be completely separated from the auditorium by a proscenium wall of not less than two-hour incombustible construction.
The proscenium wall shall extend not less than 1. Proscenium walls may have, in addition to the main proscenium opening at the orchestra pit level and not more than two openings at the stage floor level, each of which shall be not more than 2. All openings in the proscenium wall of a stage shall be protected by a fire assembly having a one and one-half-hour fire-resistive rating.
The proscenium opening, which shall be the main opening for viewing performances, shall be provided with a self-closing fire-resistive curtain according to generally recognized and accepted engineering practices. The Type of Construction for stage floors shall depend upon the requirement based on the Type of Occupancy and the corresponding fire-resistive requirements.
All parts of the stage floor shall be designed to support not less than kilograms per square meter pounds per square foot. Openings through stage floors shall be equipped with tight-fitting trap doors. The Type of Construction for platforms shall depend upon the requirements based on the Type of Occupancy and corresponding fire-resistive requirements.
Enclosed platforms shall be provided with one or more ventilators conforming to the requirements of stage ventilators: Except, That the total area shall be equal to five per cent of the area of the platform. When more than one ventilators is provided, they shall be so spaced as to provide proper exhaust ventilation.
Ventilators shall not be required for enclosed platforms having a floor area of At least one exit not less than 90 centimeters 3 feet wide shall be provided from a passageway not less than 90 centimeters 3 feet in width to a street or exit court.
An exit stair not less than 75 centimeters 2 feet, 6 inches wide shall be provided for egress from each fly gallery. Each tier of dressing rooms shall be provided with at least two means of egress each not less than 75 centimeters 2 feet, 6 inches wide and all such stairs shall be constructed as specified in this Code.
The stairs required in this Subsection need to be enclosed. Every projection room shall be of not less than one-hour fire-resistive construction throughout and the walls and ceiling shall be finished with incombustible material. The ceiling shall be not less than 2.
The room shall have a floor area of not less than 7. Every projection room shall have at least two doorway separated by not less than one-third the perimeter of the room, each at least 75 centimeters 2 feet, 6 inches wide and 2.
All entrances to a projection room shall be protected by a self-closing fire assembly having a three-fourths hour fire-resistive rating. Such doors shall open outward and lead to proper exits as required in this Code and shall not be equipped with any latch. The maximum width of such door need be no more than 75 centimeters 2 feet, 6 inches.
Ports in projection room walls shall be of three kinds: There shall be provided for each motion picture projector not more than one projection port, which shall be limited in area to square centimeters square inches , and not more than one observation port, which shall be limited in area to square centimeters square inches.
There shall be not more than three combination ports, each of which shall not exceed 75 centimeters by 60 centimeters 30 inches by 24 inches. Each port opening shall be completely covered with a pane of glass: Except, That when acetate safety film is used projection ports may be increased in size to an area not to exceed square centimeters square inches. Each port and every other opening in projection room walls, including any fresh-air inlets but excluding exit doors and exhaust ducts, shall be provided with a shutter of not less than No.
Shutters shall be arranged to slide without binding in guides constructed of material equal to the shutters in strength and fire resistance. Shutters of a size greater than square centimeters square inches shall be equipped with a counter-balance. There shall also be a fusible link located over the upper magazine of each projector, which, upon operating, will close all the shutters. In addition, there shall be provided suitable means for manually closing all shutters simultaneously from any projector head and from a point within the projection room near each exit door.
Shutters on openings not in use shall be kept closed: Except, That shutters may be omitted when acetate safety film only is used. A fresh-air inlet from the exterior of the building not less than Ventilation shall be provided by one or more mechanical exhaust systems which shall draw air from each arc lamp and from one or more points near the ceiling.
Systems shall exhaust to outdoors either directly or through an incombustible flue used for no other purpose. Exhaust capacity shall be not less than 0.