Hardscape Design Flashcards
6 cards from real Landscape Design practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Hardscape Design flashcards as text
What is 'permeable paving' and what environmental benefit does it provide?
Answer: Porous paving that allows water to infiltrate through the surface, reducing stormwater runoff
Permeable paving allows stormwater to infiltrate through the surface into the ground below, reducing runoff volume, recharging groundwater, and filtering pollutants.
What is the primary structural role of a 'deadman' in a retaining wall?
Answer: A perpendicular anchor element extending into the hillside to resist overturning forces
A deadman is a tie-back element placed perpendicular to the wall face and extending into the backfill, anchoring the wall against the horizontal soil pressure that could cause it to overturn.
What is 'polymeric sand' used for in paver installations?
Answer: A sand and polymer binder mixture swept into paver joints that hardens to resist erosion and weed growth
Polymeric sand contains a polymer binder that, when activated with water, hardens in the joints between pavers to resist erosion, insect intrusion, and weed germination.
Which outdoor structure requires a building permit in most US jurisdictions?
Answer: A deck attached to the house structure exceeding 30 inches in height
Attached decks exceeding 30 inches above grade typically require building permits in most US jurisdictions due to structural, safety, and zoning code requirements.
What is the recommended setback distance from structures for planting large deciduous trees in a residential landscape?
Answer: 15–20 feet minimum depending on mature canopy width
Large deciduous trees should be planted at least 15–20 feet from structures to allow for root spread, mature canopy width, and to prevent root or branch damage to the building.
What is 'light pollution' in the context of landscape lighting design, and how is it mitigated?
Answer: Unwanted light spillage beyond the intended area, mitigated using shielded fixtures and proper aiming
Light pollution refers to light that escapes beyond its intended target area into the sky or neighboring properties, reduced by using full-cutoff shielded fixtures aimed precisely at the intended subject.
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