N.Y.C. Admin. Code § EBC 705: Section EBC 705: Loads

705.1 General.

Loads shall comply with the New York City Building Code unless otherwise noted in Sections 705.2 through 705.6.

705.2 Dead loads.

The existing dead loads shall be confirmed by a rational approach relying upon accepted references, available information including design documents, in-situ and non-destructive testing, or design codes and standards of practice.

705.3 Live loads.

Uniform and concentrated live loads shall be in conformance with Section 1607 of the New York City Building Code.

Exception: For buildings or portions thereof designed to live load criteria in effect prior to July 1, 2008, that are not being modified or structurally altered, design uniform live loads shown in Table 705.3 shall be permitted.

Table 705.3 Minimum Design Live Loads for Buildings Constructed in Accordance with 1968building Code or Building Code Predating 1968

(Occupancy classifications are as defined by the New York City Building Code)

LIVE LOAD OCCUPANCY

MINIMUM DESIGN LIVE LOAD (PSF)

Commercial Space - Corridors (Above Ground Floor)

75

Manufacturing

100

Marquees

60

Storage (Light)

100

Storage (Heavy)

150

Wholesale Stores

100

705.4 Evaluation of snow, ice and rain loads.

Snow, rain on snow, ice loads including snow drift, sliding and unbalanced snow conditions shall be calculated according to the New York City Building Code and ASCE 7.

705.4.1 Snow sliding.

Where a vertical or horizontal alteration is performed, the altered building shall be designed to limit displacement of snow through sliding.

705.4.2 Special consideration.

Where existing buildings adjacent to a vertical or horizontal alteration have roofs with wood, steel truss or cold formed steel joists spanning 25 ft or less, a visual condition assessment of such adjacent building, as relevant to snow, ice or rain loading, shall be performed. Such visual assessment may be taken from the adjacent altered building’s roof and from the adjacent ground and need not require the use of magnifying devices. The owner of the building causing the vertical or horizontal alteration shall provide the results of the condition assessment to the owner of such adjacent building.

705.5 Wind loads.

Wind loads shall be determined in accordance with the New York City Building Code.

705.6 Seismic loads.

Seismic design shall be in accordance with either the New York City Building Code or ASCE 41, with each code followed in its entirety, as specified below:

1. Demand and capacity determined in accordance with the New York City Building Code.

2. Demand and capacity determined in accordance with ASCE 41, using a Tier 3 procedure and the two-level performance objective indicated in Table 705.6 for the applicable Risk Category. Site Class shall be determined in accordance with Chapter 16 of the New York City Building Code. Liquefaction evaluation shall be performed in accordance with Chapter 18 of the New York City Building Code.

Table 705.6 Performance Objectives for Use in ASCE 41 for Compliance with New York City Building Code-Level Seismic Forces

RISK CATEGORY (Based on

New York City Building Code

 Table 1604.5)

STRUCTURAL PERFORMANCE LEVEL FOR USE WITH BSE-1N EARTHQUAKE HAZARD LEVEL

STRUCTURAL PERFORMANCE LEVEL FOR USE WITH BSE-2N EARTHQUAKE HAZARD LEVEL

I

Life Safety (S-3)

Collapse Prevention (S-5)

II

Life Safety (S-3)

Collapse Prevention (S-5)

III

Damage Control (S-2)

Limited Safety (S-4)

IV

Immediate Occupancy (S-1)

Life Safety (S-3)