N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 80-7.8

Current through Register Vol. 46, No. 53, December 31, 2024

Section 80-7.8 - Test procedure

(a) Mount the specimen horizontally on the support frame with the sewn sides and end held at a one-inch thickness by the U-shaped hold-down plate, spacers and clamps.

(b) Attach two #50 white mercerized cotton threads to one edge of the frame at points 11/2 inches and 111/2 inches back from the open end, i.e., with 10 inches in between, and stretch across the sample, attaching small weights to the overhanging ends of the threads. Timing will begin and end as the respective threads burn through and their weights drop.

(c) With the flame adjusted in accordance with subdivision (h) of section 80-7.6 of this Part and the frame with mounted specimen in the test cabinet, position the burner so that the center of the burner tip is 3/4 inch below the center of the edge of the exposed end of the specimen.

(d) Lower the door of the test cabinet.

(e) Expose the sample to the flame for 30 seconds to force ignition.

Note:

The most reproducible results are produced when the fan in the hood is turned off, or down if a variable speed fan is used, during the 30 second ignition period. During this time it is desirable that the burner flame not flicker. Following the ignition period the fan should be turned back up to exhaust fumes, yet not cause a draft in the test cabinet.

(f) Begin timing when the first weight drops and continue until the second weight drops or until the flaming stops.

(g) Calculate the burn rate using the following formula:

B = 60 × D/T

Note:

B = Burn rate in inches per minute

D = Distance the flame travels in inches, and

T = Time in seconds for the flame to travel D inches.

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Test Cabinet Materials List

All items 1/83 stainless except as noted

*Item*	*No. required*	*Description*
1	4	Corner angle, 1" × 28
2	4	Window frame, 3" × 28"
3	4	Frame spacer, 1- 3/4" × 4"
4	4	Window seat, 1- 1/4" × 4""
5	1	Window, heat resistant glass, 3/16" ×20" × 20"
6	3	Panel, 24" × 24"
7	1	Top plate, 24-1/2" × 26
8	2	chain, 24"
9	2	Window stop rods, 1/4" dia × 4"
10	4	S-hooks
11	22	Bolt w/nut, 1/4-20 × 3/4"
12	6	Bolt w/nut, 10-24 × 1/2"
13	2	Hole, 1/4" dia.

N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 80-7.8

The window glass slides up and down; its edges are taped to avoid cuts; rubber tubing on top of seat acts as cushion.