Building Occupant Load Calculation

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Questions and Answers

What factors determine the maximum height and number of storeys of a building?

Street width and car parking availability

Population density and building bulk (correct)

Architectural style and interior design

Building's age and historical significance

How is the height of a building measured?

From the middle of the building

From the lowest adjoining surface (correct)

Using GPS coordinates

From the rooftop

What is the limit on the height of towers, spires, and steeples if made of combustible materials?

No height limit

3.00 meters above the height limits

6.00 meters above the height limits for each occupancy group (correct)

Equal to the maximum building height

For Group A dwellings, what percentage of a corner lot can a dwelling occupy?

90% Signup and view all the answers

What provision must a dwelling meet regarding light and ventilation?

Provide adequate light and ventilation Signup and view all the answers

How many sanitary toilets must every dwelling have according to the code?

At least one Signup and view all the answers

What determines the total exit width required from any storey of a building?

The occupant load of that storey Signup and view all the answers

How should two exits be placed if only two exits are required for a building area?

Not less than one-fifth of the area's perimeter apart Signup and view all the answers

In what situation can the distance from exits be increased to 60.00 meters in a building?

When the building is equipped with a complete automatic fire extinguishing system Signup and view all the answers

Which type of door does the provision apply to according to the text?

Doors serving areas with an occupant load of more than 10 Signup and view all the answers

What percentage of the occupant load in the storey immediately beyond the first adjacent storey contributes to determining exit width?

25% Signup and view all the answers

Why should three or more exits be arranged a reasonable distance apart according to the text?

To allow for availability of alternative exits if one becomes blocked Signup and view all the answers

What is the minimum width required for approved revolving doors used in exit situations?

2.00 meters Signup and view all the answers

In what case can approved revolving doors be used in exit situations?

When adjacent to a conforming exit door Signup and view all the answers

How much can trim, handrails, and fully opened doors obstruct the required width of corridors and exterior exit balconies?

200 millimeters Signup and view all the answers

If more than one exit is required, how should they be arranged in relation to the corridors or exterior exit balconies?

Exits must allow going to either direction from any point in the corridor Signup and view all the answers

What is the minimum width required for every corridor or exit balcony serving as a required exit for an occupant load of more than ten?

1.10 meters Signup and view all the answers

In what case can approved revolving doors not be used in exit situations?

When reducing corridor width by more than one-half Signup and view all the answers

What is the maximum rise allowed from one row of seats to the next?

400 millimeters Signup and view all the answers

What is the required minimum width for a seat when determining seating capacity?

450 millimeters Signup and view all the answers

In open air stands with seats without backrests, what is the maximum number of seats allowed between any seat and an aisle?

15 Signup and view all the answers

Under what conditions can aisles be omitted in a stand?

The rise from row to row exceeds 300 millimeters per row Signup and view all the answers

What is the minimum width required for aisles in stands?

1.10 meters Signup and view all the answers

How many rows deep can a vertical aisle have a dead end regardless of the number of exits required?

16 rows Signup and view all the answers

Which qualifications are required for someone to be appointed as a Building Official?

Being a registered architect or civil engineer and a member of a duly accredited organization Signup and view all the answers

What is the duty of a Building Official regarding building permits?

Issuing building permits Signup and view all the answers

How long must a person be a member of a duly accredited organization to qualify as a Building Official?

2 years Signup and view all the answers

What happens if regular positions of Building Official are provided?

The Secretary's designation ends immediately Signup and view all the answers

What is the primary responsibility of a Building Official in his territorial jurisdiction?

Enforcing the provisions of the National Building Code Signup and view all the answers

Can a Building Official inspect buildings at any time?

Yes, at all reasonable times Signup and view all the answers

Study Notes

Building Official Designation and Qualifications

The Secretary's designation of a Building Official continues until regular positions are provided or terminated by law or decree.
A Building Official must possess the following qualifications:
- Be a Filipino citizen of good moral character.
- Be a duly registered architect or civil engineer.
- Be a member of a duly accredited organization of their profession for at least two years.
- Have at least five years of diversified and professional experience in building design and construction.

Duties of a Building Official

The Building Official is responsible for enforcing the provisions of the National Building Code and implementing rules and regulations.
They are charged with issuing building permits.
They may enter any building or its premises at reasonable times to inspect and determine compliance with the Code.

Maximum Height of Buildings

The maximum height and number of storeys of a building depend on the character of occupancy and type of construction.
The height is measured from the highest adjoining sidewalk or ground surface.
The height measured from the lowest adjoining surface shall not exceed the maximum height by more than 3.00 meters.
Towers, spires, and steeples are limited in height only by structural design if completely of incombustible materials.

Minimum Requirements for Group A Dwellings

A dwelling shall occupy not more than 90% of a corner lot and 80% of an inside lot.
The dwelling shall be at least 2 meters from the property line.
Every dwelling shall be constructed and arranged to provide adequate light and ventilation.
Every dwelling shall be provided with at least one sanitary toilet and adequate washing and drainage facilities.

Exits

The total exit width required from any storey of a building is determined by using the occupant load of that storey plus the percentage of the occupant loads of floors which exits through the level under consideration.
The maximum exit width from any storey of a building shall be maintained.
If only two exits are required, they shall be placed a distance apart of not less than one-fifth of the perimeter of the area served.
No point in a building without a sprinkler system shall be more than 45.00 meters from an exterior exit door, a horizontal exit, exit passageway, or an enclosed stairway.
In a building equipped with a complete automatic fire extinguishing system, the distance from exits may be increased to 60.00 meters.

Doors

Exit doors shall conform to all provisions in the following cases:
- Approved revolving doors having leaves which will collapse under opposing pressures may be used in exit situations.
- The minimum width of revolving doors is 2.00 meters or they are not used in occupancies where exits are required to be equipped with panic hardware.

Corridors and Exterior Exit Balconies

Every corridor or exterior exit balcony serving as a required exit for an occupant load of more than 10 shall have a minimum width of 1.10 meters.
The required width of corridors and exterior exit balconies shall be unobstructed.
Doors in any position shall not reduce the required width of the corridor by more than one-half.

Seating Capacity

The width of any seat shall not be less than 450 millimeters nor more than 480 millimeters.
The number of seats between any seat and an aisle shall not be greater than 15 for open air stands with seats without backrests, 36 for open air stands with seats having backrests, and 6 for seats with backrests in buildings.

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Description

Test your knowledge on calculating the total exit width required from any storey of a building based on the occupant load and percentage distribution. Understand how to determine the exit width for different storeys of a building.