// CODE SNIPPET
2409.4 Design Formula
JUMP TO FULL CODE CHAPTER
Where:
The design of the glazing shall be based on
where Fg is the maximum load on the glass determined from the load combinations above, and Fga is the maximum allowable load on the glass, computed by the following formula:
Where:
Glass in floors and sidewalks shall be designed to resist the most critical of the following combinations of loads:
Fg = 2Fu + D
(Equation 24-11)
Fg = (8Fc /A) + D
(Equation 24-12)
Fg = Fa + D
(Equation 24-13)
Where:
| A | = | Area of rectangular glass, ft2 (m2). |
| D | = | Glass dead load (psf) = 13 tg (for SI: 0.0245 tg, kN/m2). |
| tg | = | Total glass thickness, inches (mm). |
| Fa | = | Actual intended use load, psf (kN/m2). |
| Fc | = | Concentrated load, pounds (kN). |
| Fg | = | Total load, psf (kN/m2) on glass. |
| Fu | = | Uniformly distributed load, psf (kN/m2). |
The design of the glazing shall be based on
Fg ≤ Fga
(Equation 24-14)
where Fg is the maximum load on the glass determined from the load combinations above, and Fga is the maximum allowable load on the glass, computed by the following formula:
Fga = 0.67 c2 Fge
(Equation 24-15)
Where:
| Fge | = | Maximum allowable equivalent load, psf (kN/m2), determined from Figures 2404(1) through 2404(12) for the applicable glass dimensions and thickness; and |
| c2 | = | Factor determined from Table 2404.2 based on glass type. |
The factor, c2, for laminated glass found in Table 2404.2 shall apply to two-ply laminates only. The value of Fa shall be doubled for dynamic applications.
Related Code Sections
2409.4 Glass and Glazing, Design Formula
Glass in floors and sidewalks shall be designed to resist the most critical of the following combinations of loads:
F g = 2 F u + D ...
NYC Building Code 2008 > 24 Glass and Glazing > 2409 Glass in Floors and Sidewalks > 2409.4 Design Formula
3.18.3.6.2 Hydraulic Elevators, Design Formulas
They shall be designed and constructed in accordance with the applicable formulas in 8.2.8.3, provided that steel heads shall in no case have ...
Safety Code for Elevators and Escalators 2013 of New York City > 3 Hydraulic Elevators > 3.18 Hydraulic Jacks > 3.18.3 Cylinders > 3.18.3.6 Closed Cylinder and Plunger Heads > 3.18.3.6.2 Design Formulas
Section 8.2 General Requirements, Design Data and Formulas
Requirement 8.2 contains certain design data, formulas, and charts for the designer. It is not intended to limit design. More detailed design ...
Safety Code for Elevators and Escalators 2013 of New York City > 8 General Requirements > 8.2 Design Data and Formulas
8.4.12 General Requirements, Design Data and Formulas for Elevators
The following formulas shall be used to determine the maximum allowable weight per pair of guide rails ...
Safety Code for Elevators and Escalators 2013 of New York City > 8 General Requirements > 8.4 Elevator Seismic Requirements > 8.4.12 Design Data and Formulas for Elevators
8.2.2 General Requirements, Electric Elevator Car Frame and Platform Stresses and Deflections
The stresses and deflections in side-post-type car frame and platform members shall be based on the data and formulas listed in 8.2.2. All stresses ...
Safety Code for Elevators and Escalators 2013 of New York City > 8 General Requirements > 8.2 Design Data and Formulas > 8.2.2 Electric Elevator Car Frame and Platform Stresses and Deflections