high-rise office General Conditions / Premium Time Work Requirements
What it means on the job
The high-rise commercial office specification requires a minimum 5-day notice for any service interruptions to existing tenants. While scheduling the work on Saturday (premium time) to avoid tenant disturbance is correct, the 2-day notice is 3 days short of the minimum. In a multi-tenant high-rise at downtown office tower, existing tenants may have critical systems (servers, security, HVAC) that require orderly shutdown before a power outage. The 5-day notice allows tenants to back up data, arrange for UPS systems, notify their own building occupants, and coordinate with IT staff.
Tested in 2 CraftIQ puzzles
- whats-wronghigh-rise office Office TI: Service Interruption and Temporary Power
- code-checkhigh-rise office Office TI: Service Interruption Notice
Related OTHER sections
high-rise office Base Building Standard / ASHRAE 90.1 Section 8 / LEED v4 EAp3
The high-rise office specification explicitly requires BTU meters to be tied to the base building BMS for usage monitoring. Standalone BTU meters with local-only display fail this requirement on multiple fronts: (1) the base building team cannot remotely monitor tenant energy usage for cost allocation; (2) historical trend data is not captured for energy analysis and LEED reporting; (3) there is no remote alarm notification if a meter fails or reads anomalously; (4) LEED v4 prerequisite EAp3 requires building-level energy metering with data accessible from the BMS. The BTU meters have BACnet communication modules — the points must be mapped, trended, and alarmed in the base building BMS to satisfy the specification.
high-rise office Electrical Plans / building alarm integration documents
The project electrical plans require leak detectors in data rooms to be wired to the leak detection panel and integrated with the building alarm/monitoring system. Unconnected leak detectors provide no protection against water intrusion that could destroy data equipment worth hundreds of thousands of dollars. (This is a contract-document/plan requirement, not an NEC-governed item.)
high-rise office Electrical Specification
high-rise commercial office specifications require 1-inch minimum empty conduit for all wall-mounted low voltage equipment junction boxes, stubbed 6 inches above the hung ceiling and turned towards the termination closet. A 3-inch stub does not meet the specification.
high-rise office Mechanical Specification
The high-rise office specification limits flex duct to a maximum of 5 feet. A 7-foot run exceeds this spec limit, increases pressure drop, and reduces airflow to the diffuser serving the office space. (NFPA 90A imposes no fixed flex-duct length limit — it caps flexible air connectors at 14 ft, not ducts.)
high-rise office Mechanical Specification — BAS Integration (open-protocol BACnet per ASHRAE 135)
The high-rise commercial office specification requires CRAC unit controls to integrate with the base building BMS (via open-protocol BACnet) for centralized monitoring and alarm notification. An isolated iCOM controller prevents the building engineer from seeing CRAC status, alarms, or performance data from the central workstation. (ASHRAE Standard 135 defines HOW devices communicate over BACnet, but the requirement that the CRAC be integrated at all is set by the project BAS specification.)
high-rise office Mechanical Specification — Transfer Fan Controls
This transfer fan installation meets the high-rise office specification requirements. The 80 degrees F setpoint matches the specified design value. The adjustable feature allows the building operator to fine-tune the setpoint for occupant comfort. The 2-degree deadband prevents the fan from short-cycling around the setpoint. Mounting on an interior wall at 4 feet height ensures representative space temperature sensing per ASHRAE guidelines. Transfer fans in commercial office TI provide supplemental cooling by moving air between zones without mechanical refrigeration.
CraftIQ explanations are original educational commentary written in trade language and verified against the cited standards. Always confirm requirements against the code edition adopted by your jurisdiction — this is training material, not a substitute for the code book or your AHJ.