RCDD · Question #66
You are reviewing a building backbone design with a vertically aligned telecommunications room (TR). In the spec you note in a footnote with details that the slots at one end of the…
The correct answer is B. 25 mm (1 in) for slots and 25 mm (1 in). BICSI best practices require both floor slots and sleeves in a telecommunications room to extend a minimum of 25 mm (1 in) above the finished floor, making a flush installation non-compliant.
Question
You are reviewing a building backbone design with a vertically aligned telecommunications room (TR). In the spec you note in a footnote with details that the slots at one end of the telecommunications room (TR) must be flush with the floor and the sleeves provide at the end of the telecommunications room (TR) must also be flush. In your meeting with the electrical engineering firm that has provided the spec, you make the comment that according to best practices, the MINIMUM that slots and sleeves must extend above the finished floor are:
Options
- A25 mm (1 in) for slots and 51 mm (2 in)
- B25 mm (1 in) for slots and 25 mm (1 in)
- C51 mm (2 in) for slots and 25 mm (1 in)
- D51 mm (2 in) for slots and 51 mm (2 in)
- E64 mm (2 1/2 in) for slots and 64 mm (2 1/2 in)
How the community answered
(20 responses)- A5% (1)
- B70% (14)
- C5% (1)
- D5% (1)
- E15% (3)
Why each option
BICSI best practices require both floor slots and sleeves in a telecommunications room to extend a minimum of 25 mm (1 in) above the finished floor, making a flush installation non-compliant.
Specifying 25 mm for slots but 51 mm for sleeves does not match the standard, which requires the same 25 mm minimum for both floor slots and sleeves.
BICSI TDMM specifies that floor slots and sleeves in telecommunications rooms must project a minimum of 25 mm (1 in) above the finished floor surface for both element types. This minimum protrusion prevents water from flooding events or floor cleaning from entering the slot or sleeve opening and damaging backbone cables routed through the pathway. Because the electrical engineering specification calls for both to be flush with the floor, it violates this minimum requirement and must be corrected before construction.
51 mm for slots and 25 mm for sleeves reverses and overstates the slot requirement while meeting only the sleeve minimum, which does not reflect any recognized standard configuration.
51 mm for both elements exceeds the stated minimum and is not the specified standard minimum protrusion height found in BICSI guidelines.
64 mm for both elements greatly exceeds the stated minimum and does not correspond to any recognized standard minimum value for slot and sleeve protrusion above finished floor.
Concept tested: TR floor slot and sleeve minimum protrusion height
Source: https://www.tiaonline.org/standard/tia-569-e/
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