Site Analysis Flashcards Preview

ARE 5.0 - P&A > Site Analysis > Flashcards

Flashcards in Site Analysis Deck (46)
Loading flashcards...
1

What is the formula to calculate slope?

G=d/L x 100%

G= slope of land (%)
d= vertical distance between contours (ft)
L= horizontal distance between contours (ft)

2

List 3 things solar orientation can influence on site planning

1. Orientation of building to control solar heat gain/loss
2. Location of outdoor spaces / activities
3. Location of building entries (best on south bc sun will melt snow/ice)

3

When is the sun the lowest in the N hemisphere?

Dec 21 winter solstice

4

When is the sun the highest in the N hemisphere

June 21 (summer solstice)

5

Solar altitude

Angle above horizon

6

Azimuth

Angle of sun N/S of an E/W line

7

What orientation is best for a bldg in the N hemisphere?

Facing south. Just east of south (5°-25° east of south is best to maximize heat gain in winter and minimize heat gain in summer)

8

What is more effective for passive solar heating in winter - window overhangs or vertical baffles?

Baffles because the sun is lower in the morning/afternoon

9

List the 4 climate regions of N America

1. Cool (Canada, N US, Rocky mountains)
2. Temperate (middle US, NW US, NE US)
3. Hot humid (SE US)
4. Hot arid (SW US)

10

List some cold climate design strategies

-goal is to minimize exposed surface area to reduce heat loss & minimize northern exposure
-air locks at entries
-landscaping to block winter winds
-mech & active solar heating
-large windows facing south, small windows east/west
-dark materials for building exterior
-use interior materials with high thermal mass

11

List some design strategies for temperate climates

-minimize northern exposure, maximize southern exposure
-shade southern exposure with deciduous trees
-buildings best oriented with long direction along E-W axis
-active & passive solar heating

12

List some design strategies for hot-humid climates

-maximize natural ventilation (narrow floor plans with cross-ventilation, porches, etc.)
-shading
-use building materials with minimal thermal mass
-light color materials for building exterior

13

List some design strategies for hot-arid climates

-use materials with high thermal mass
-pools, roof ponds (for 1-2 story buildings)
-minimize opening sizes
Light color building materials on exterior

14

List 3 types of alternate energy systems

1. Passive Solar Heating
2. Natural Cooling
3. Active Solar

15

Passive Solar Cooling

Utilizes shading, natural ventilation, radiative, evaporative, ground coupling methods

16

Radiative Cooling

Use thermal mass to store heat during day, release heat at night.

Type of passive cooling method

17

Ground Coupling

Use stable coolness of earth to cool building, typically by using ground source heat pump

Type of passive cooling method

18

What are other ways to implement natural cooling on a site?

-trees (shade)
-fixed shading devices (horizontal on south facade, vertical on north)
-use light colored / reflective materials
-limit use of paving

19

Passive Solar Heating Strategies

-orient long axis of building on E/W axis
-plant deciduous trees along E & W facades

20

List the 4 types of topography depicted by contour lines

1. Ridge
2. Valley
3. Concave slope
4. Convex slope

21

Ridge

Contour lines point in direction of downslope

22

Valley / Swale

Contour lines point in direction of upslope

23

Concave Slope

Closely spaced contour lines near top of slope

24

Convex Slope

Closely spaced lines at bottom of slope

25

With a sloping site, how is a building best oriented?

Parallel to direction of contours, to minimize cost of excavation & fill

26

What must new contour lines match up with?

Existing property line

27

Contour Line

Show elevation of land in plan view, used for slope analysis

28

Contour interval

Difference in elevation between contour lines

29

Slope

Represented as percentage, each 1% being 1 ft of vertical rise for every 100ft of horizontal distance

30

What % slopes are usable or all types of intense activities & easy to build on?

0%-4% slopes