Research Presentation Shauvik Das

May 3, 2023

Evaluation of Partial Usage of WPO 8th Floor as an Assembly Area

Shauvik Das

May 3, 2023 2

Code Research

• Partial Change of Occupancy: Portion of the 8th floor will convert to A-2.

Existing Building Code

of NYS

Work Classification

Method

Change of Occupancy (B to A-2)

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Code ResearchChange of Occupancy Classification• Change of Occupancy with and without separation.• Fire Protection Systems• Means of Egress, General• Heights and Areas• Accessibility• Structural• Mechanical• Electrical• Plumbing

May 3, 2023 4

Fire Separation Between A-2 and B • In absence of fire barrier between A-2 and B occupancy,

building should comply with the following requirements. • High Rise Building! (More than 75 Feet)

• No separation is required!

Requirements Lowest level has fire department vehicle access Emergency Voice/Alarm Communication

System

Automatic Sprinkler System (Light Hazard Occupancies)

Emergency Power

Emergency Escape and Rescue Allowable Area and Height (IA construction)

Automatic Fire Detection Automatic Fire Alarm

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Area Determination• Total Floor Area: 22400 SF• A-2 area: 10150 SF (Approximate)• B area: 12250 SF

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Occupant Load Determination• Change to higher hazard category • Occupancy B (Hazard Category, B ) Occupancy A-2 (Hazard Category, 3)

• BC Table 1004.10.1: Maximum floor area allowances per occupant• A-2 (un-concentrated tables and chairs): 15 net• Business, B: 100 gross

Occupant Load (A-2) Occupant Load (B) Total Occupant Load = A-2 +B

676 persons 122 persons 798 persons

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Means of Egress • BC 1019: Number of Exits: Existing is 2! • Maximum occupant load in A-2 can be 500!

• BC Table 1005.1: Egress Width per occupant load



Occupancy A-2 + B Width of Stairways (With Sprinkler Systems)

Existing Width of Stairways (With Sprinkler

Systems)

Stairways (inches per occupant): 0.2

13.3 Feet 8.67 Feet

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Means of Egress • Allowable Occupant Load in the 8th Floor Assembly Area



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Structural/Higher Gravity Loads• Confirm higher floor loading: Building Code• Table 1607.1: Minimum Uniformly Distributed Live Loads

and Minimum Concentrated Live LoadsOccupancy or Use Minimum uniformly distributed live

loads and minimum concentrated live loads

For Assembly areas-Moveable seats (A-2):

Uniform 100 Psf.

For Business areas (B) Uniform 50 Psf.

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Mechanical Ventilation• Confirm Ventilation Requirements: Mechanical Code • Table 403.3: Required outdoor ventilation air

• A-2: 15 CFM per person• B: 20 CFM person

Occupant in A-2 Area CFM Requirements (Outdoor Air)

400 6000 CFM

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Code Compliance Comments • Submit Permit application with a Floor Plan.• Permit Plan should demonstrate compliance with

Occupant LoadSeating Arrangements

Egress Components (Exits, Exit Signs, Exit Access)Fire Alarm Devices (Pull Stations)

Mechanical VentilationStructural/Gravity Loads

May 3, 2023 12

Summary • Change of Occupancy• Implications: Occupant Load Structural Load Mechanical Ventilation• Required Actions: Permit Application With Floor Plan

Research Presentation Shauvik Das

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