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Pre-Bid Equipment Estimation
The pre-bid equipment estimation is performed prior to bidding the installation. At this point, it must be
determined what type of coverage is desired, and where the coverage will be required. For example, the amount
of equipment required for a full-coverage (indoor and outdoor) system in a multi-building application will be
greater than an installation that requires outdoor only coverage. The customer should be consulted and the
areas of most concern should be given special consideration.
Initial Equipment Estimate
Number of Indoor Receivers
To estimate the number of indoor Receivers, assume the receivers will be placed on a grid with a maximum
spacing of 80 ft. (25 m) between Receivers for standard construction. In multi-floor applications the Receivers on
each floor must be placed directly above the Receivers on the floor below (this is required for proper floor-to-floor
location).
For example, to determine the number of Receivers required to protect a building of standard construction of 60
m (200 ft.) by 30 m (100 ft.) and four floors:
1.
To determine the number of Receivers in each direction, divide each dimension of the building by 25 m (80
ft.) and drop the remainder and add 1.
(60 m/25 m = 2.4 becomes 2 add 1 = 3 and 30 m/25 m =1.2 becomes 1 add 1 = 2) or
(200 ft./80 ft. = 2.5 becomes 2 add 1 = 3 and 100 ft./80 ft. =1.25 becomes 1 add 1 = 2)
2.
To determine the number of Receivers required per floor, multiply the number of Receivers in one direction
by the number of Receivers in the other direction.
(3 x 2 = 6) 6 Receivers per floor.
3.
To determine the total number of Receivers, multiply the number of Receivers per floor by the number of
floors.
(6 x 4 = 24) 24 Receivers for the building.
Each floor would require 6 Receivers, resulting in a total of 24 Receivers to protect this building.
For the best location accuracy consistent Receiver spacing is important. Do not place Receivers significantly
closer in one section of a building than another section.
60 m
(200 ft.)
25 m
(80 ft.)
Receivers (6)
Security Escort Training
Page 19 of 142
25 m
30 m
(80 ft.)
(100 ft.)
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