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According to NFPA 101, Life Safety Code, the minimum clear width of a door opening in a means of egress is 32 inches (810 mm). This dimension ensures that the opening is wide enough to allow for the safe and efficient egress of occupants, including individuals using wheelchairs or other mobility aids, during an emergency evacuation. The width is measured from the face of the door to the opposite doorstop when the door is fully open.

On the plan sheet P01, the fire protection symbols that are square with a solid dot typically represent a recessed pendent sprinkler head designed for ordinary temperature, quick response. This symbol is used in NFPA standards, particularly in NFPA 13, to indicate sprinkler types and their installation characteristics. Recessed pendent sprinklers are installed to protect against fire hazards from the ceiling downwards, and their quick response mechanism helps to control fires rapidly in occupied spaces.

The minimum rating for visible indicating appliances in corridors is 15 cd (candela), as specified by NFPA 72, National Fire Alarm and Signaling Code. This requirement ensures that the visual signals are bright enough to be seen by occupants during an emergency, providing adequate warning to facilitate evacuation. The 15 cd rating is the standard for most corridors to ensure visibility over the required distance, especially in areas with no natural light or in emergency lighting conditions.

For educational occupancies such as a high school computer lab, the occupant load factor is typically 35 square feet per person (NFPA 101, Life Safety Code, Table 7.3.1.2). The occupant load is calculated by dividing the total area by the occupant load factor:Occupant Load=682 ft235 ft2/person≈19 occupants\text{Occupant Load} = \frac{682 \, \text{ft}^2}{35 \, \text{ft}^2/\text{person}} \approx 19 \, \text{occupants}Occupant Load=35ft2/person682ft2​≈19occupants

An elevation view is an architectural drawing that shows the vertical view of a building, including floors, building height, and the grade of surrounding ground. It is used to depict the exterior or interior walls of a structure from a vertical perspective. This view provides details on the heights of various building elements and their relationships to the surrounding terrain.

To determine the approximate length of the dead-end corridor in the given figure, we must identify the corridor section that meets the definition of a dead-end. A dead-end corridor is a hallway with only one way out, posing a potential risk in case of an emergency due to a lack of alternative egress routes.

Based on the image provided:

Locate the Dead-End Corridor:The dead-end corridor would be the section of the hallway that does not provide an exit in two directions.

Measure the Length:The length of this corridor is the distance from the point where it ends (a wall or another impassable barrier) to the nearest point where it provides access to a way out or another direction.

From the image, the corridor to the left of rooms 103, 104, and 105 appears to be a dead-end corridor.

Approximate Length Calculation:

The length of the dead-end corridor is indicated in the diagram as "31 ft 6 in. (9.6 m)".

The graph labeled as"Water Supply Graph N°2"presents a standard water supply flow test summary, which indicates the relationship between pressure (psi or kPa) and flow (gpm or Lpm) for a specific system or hydrant.

How to interpret the graph:

Static Pressure:

This is the pressure measured when there is no water flowing, shown at the highest point on the left side of the graph (indicated as approximately 100 psi or 689 kPa in this case).

Residual Pressure:

This is the pressure available when water is flowing at a specific rate. The residual pressure line decreases as flow increases, indicating that the pressure reduces when water is drawn from the system.

Maximum Available Water:

Themaximum available wateris the point where the system can deliver the highest possible flow (gpm) before the residual pressure reaches a critical minimum level, indicating the system’s limit.

Flow at Maximum Available Water:

In this specific graph, the point marked asMaximum Available Wateris where the flow reaches1,980 gpm(7,495 Lpm). This is derived by following the flow axis (horizontal axis) until it intersects with theMaximum Available Watercurve on the graph.

Why the Correct Answer is C (1,980 gpm):

By following the plotted line for residual pressure, the graph shows that the maximum flow attainable from the system is1,980 gpm(7,495 Lpm) before pressure drops too low. This value represents the system's maximum water supply capacity under normal operating conditions.

This analysis is consistent with the flow rates displayed on the graph and matches the key markers labeled, which indicate the operational limits of the system.

NFPA Relevance:

In fire protection and water supply systems, understanding the maximum available water flow is essential for ensuring that sufficient water can be delivered in the event of a fire. This calculation is particularly relevant in the context of NFPA 20 (Standard for the Installation of Stationary Pumps for Fire Protection) and NFPA 25 (Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems), as these standards require that water supply systems are capable of delivering adequate flow to suppression systems under expected fire conditions.

When reviewing drawings, the preferred method for determining measurements is to use the dimensions provided directly on the drawing. According to NFPA 1031, Fire Inspector and Plan Examiner Professional Qualifications, using the given dimensions ensures accuracy, as these measurements are usually verified by the architect or engineer responsible for the drawing. Measuring directly from the drawing using an architect's scale (option A) can lead to inaccuracies due to print scale errors or reproduction. Therefore, relying on the provided dimensions is the best practice.

In a performance-based design, the criteria the designer must meet are defined by goals and objectives related to life safety and fire protection. Performance-based designs rely on achieving specified safety outcomes, rather than strictly adhering to prescriptive code requirements. This approach allows for innovative solutions that meet or exceed the safety objectives outlined by applicable fire protection standards, such as those found in NFPA 101 and NFPA 5000.