NCARB Project-Planning-Design Exam Dumps

Wind pressure on a building's roof can be either positive (pressure pushing down on the surface) or negative (suction or uplift). The distribution of pressure depends largely on wind direction relative to the building geometry and roof slope.

Option C: When wind strikes the roof perpendicular to the ridge with slopes between 30 and 45 degrees, the wind creates a positive pressure on the windward side of the roof. This is because the air impinges directly onto the sloped surface, pushing downward and exerting positive pressure. The leeward side of the roof, by contrast, experiences negative pressure (suction). This condition is well documented in ASCE 7 and reflected in the IBC (International Building Code) wind load provisions.

Option A: Wind parallel to the long side with a flat roof typically causes mostly negative pressures (suction) on the roof, not positive pressures, because the airflow accelerates over the roof surface.

Options B and D: At lower roof slopes (like 15 degrees) or when the wind is parallel to the ridge with moderate slopes, the roof usually experiences suction (negative pressure) rather than positive pressure. The flatter or more parallel the surface is relative to wind flow, the more suction effects dominate.

Positive wind pressure on roofs is important for structural design because it influences the design of roofing systems, connections, and overall structural loads. Understanding when and where positive pressure occurs ensures proper anchorage and prevents failures due to uplift or overturning forces.

ARE 5.0 Project Planning & Design Content Outline: Environmental Conditions and Context - Wind Loads and Effects

ASCE 7-16: Minimum Design Loads for Buildings and Other Structures (Chapter on Wind Loads)

The Architect's Handbook of Professional Practice, 15th Edition, Chapter 13: Building Codes, Standards, and Regulations --- Wind Design

Comprehensive and Detailed Explanation From Exact Extract:

For stairs serving 100 occupants, building codes such as IBC require a minimum clear width of 44 inches to accommodate occupant egress.

36 inches is typical minimum for stairs serving smaller occupant loads.

Wider widths like 48 or 60 inches are required for higher occupant loads.

Handrails and projections may reduce nominal width but are not included in minimum clear width measurements.

ARE 5.0 PPD -- Codes and Regulations, Egress Requirements

IBC 2018 Chapter 10 -- Means of Egress

Comprehensive and Detailed Explanation From Exact Extract:

Underground detention systems store stormwater beneath the surface, reducing runoff rates by releasing water slowly to waterways. The primary benefit is that they minimize surface land use for detention basins, thereby maximizing the developable site area available for buildings and landscaping.

Groundwater purity protection (A) is managed by treatment practices but is not the primary benefit of detention.

Site improvement costs (C) may increase due to system complexity.

Creating wetlands (D) relates to retention basins, not underground detention.

ARE 5.0 PPD -- Environmental Conditions and Context, Stormwater Management

The Architect's Handbook of Professional Practice, 15th Edition -- Site Planning and Drainage

________________________________________

Comprehensive and Detailed Explanation From Exact Extract:

Using natural light as a primary source of ambient lighting is a sustainable strategy to improve indoor environmental quality and reduce energy consumption. However, careful control of daylighting is essential to avoid glare and overheating.

Exterior shading devices (such as louvers, overhangs, and fins) are critical in managing solar heat gain and glare by controlling direct sunlight before it enters the building envelope. They help maintain visual comfort and reduce cooling loads, directly impacting energy costs and occupant comfort.

Operable windows on opposite walls facilitate cross ventilation, which is beneficial for natural ventilation but does not directly control daylighting quality or energy use related to lighting.

Clear glazing window wall systems maximize daylight penetration but can increase solar heat gain if not properly shaded, thus increasing cooling loads.

Single switched lighting controls are a basic electrical feature and do not influence daylighting quality or energy efficiency related to natural light.

NCARB's PPD guidelines emphasize integrating exterior shading as a passive design strategy to optimize daylight use and reduce reliance on mechanical cooling and artificial lighting, improving building performance sustainably.

ARE 5.0 Project Planning & Design -- Environmental Conditions and Context

The Architect's Handbook of Professional Practice, 15th Edition -- Sustainable Design and Daylighting

NCARB Guidelines on Daylighting and Energy Efficiency

Comprehensive and Detailed Explanation From Exact Extract:

Designing lighting systems based on initial lamp lumen output (the maximum light output when lamps are new) without accounting for lumen depreciation (light loss over time) typically leads to increased number of lamps or fixtures to compensate for future light loss, ensuring adequate illumination throughout the system's life.

This approach does not directly affect glare (B, D).

It does not decrease the number of lamps (A); it often increases them for safety margin.

ARE 5.0 PPD -- Environmental Conditions and Context, Lighting Design

The Architect's Handbook of Professional Practice, 15th Edition -- Lighting