Chapter 21 Measurment and drafting Flashcards
EDM & REDM (Measuring tools and techniques)
EDM - electronic distance measurer (very accurate)
REDM - reflectorless electronic distance measurer (accurate)
ectified Photography (Measuring tools and techniques)
large format film based camera views for facades that dimensions can be taken from
Orthophotography (Measuring tools and techniques)
Similar to Rectified photography but with digital images
Photogrammetry (Measuring tools and techniques)
surveying of objects or spaces by using photos and software
Stereophotogrammetry (Measuring tools and techniques)
uses two overlapping photos at different angles used to create a 3D drawing on a computer
Convergent photogrammetry (Measuring tools and techniques)
uses multiple oblique photos of an object taken @ diff angles. measurements and 3D models are derived using software
Laser Scanning (Measuring tools and techniques)
uses medium range pulsing laser beams which systematically sweep over an object or space to obtain 3D coordinates of points on surfaces of object or space being scanned
Efficiency Factor
Ratio of net area to the total occupant area
Occupant area
total portion of a building being actively used by a tenant
estimated Required Occupant Area
calculated by dividing the net area by the efficiency factor.
Determining rentable area
Common building areas include shared corridors, restrooms, elevator lobbies, mechanical rooms, vending areas…
rentable area is the product of the tenant’s occupant area and a load factor
to account for the shared portion of the building
BOMA
Building Owners and Managers Association - produces standards detailing common methods of measuring space for retail, industrial, multi residential, and mixed use buildings.
IFMA
International Facility Mangement Association also produces standards that give methods for measuring space
When office lease space only occupies a portion of a floor
if glass is greater than 50% of wall area, occupant area is measured from inside glass surface to finish inside face of interior wall (to shared space) and to the centerline of the walls shared by other tenants
if glass is less than 50% of wall area, space is measured to inside surface of exterior wall
When a tenant occupies an entire floor
occupant area includes all the space taken by the base building circulation, as well as the elevator lobby
base building circulation is the minimum path on a multi-occupant floor necessary for access to and egress from occupant areas, elevators, stairs, restrooms, janitors closets, and similar areas
