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PULL OUT CAPACITY TEST

September 5, 1996
Revised September 17, 1996

Steve Ross
Foam Concepts
825 Lakeview, Unit C
Placentia, CA 92670

Re: Lab. No 10678-96/1433

Dear Steve:

At your request, Ramtech Laboratories conducted testing to determine the following:

A. Determine the pull out capacity of the Styro-loc metal insert from Type I Expanded Polystyrene Foam.
   
B. Determine the capacity of the metal flashing, flashing strip and STYRO-loc® system when subjected to negative loading.

The Styro-loc system incorporates a 0.025-inch thick metal insert which is inserted into a slot provided in the Expanded Polystyrene Foam. See Attachment 2 for detail. The metal insert may be placed at any location on the surface of he EPS. The assemblies submitted to the laboratory had the insert placed 2.62 inch from the edge. For design of parapets to include decorative designs, the EPS is molded to various shapes and adhered to the face of the parapets. To facilitate the attachment of the flashings to cover the top, the Styro-loc insert provides a method to anchor the flashing to protect the top of the EPS and parapet.

Test Specimen:

The test specimens, delivered to Ramtech Laboratories, were 18 inches wide by 48 inches long by 12 inches thick. The metal inserts were located approximately 2-5/8 inches from the edge of the EPS. A 2-inch wide metal strip/clip of 0.056 inch thick metal, including galvanizing, was installed perpendicular to the Styro-loc inserts at 23 inches centers. The metal strip was bent around the edge and extended down 3 inches. The end of the metal strip/clip was bent outwards approximately 1/2 inch to receive the flashing. At each intersection with the Styro-loc inserts, the metal strip was fastened to the Styro-loc insert with one hex head self drilling screw (0.125-inch shank x 7/8-inch long). See Attachment 1 for manufacturer’s brochure.

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Test Program:

A. Negative Uniform Load Test: For this test, the flashing cap was loaded using an air bag. The air bag was placed between the flashing cap and the EPS foam. Air was introduced to the air bag using a compressor and the resulting pressure was monitored with a water manometer. Dial indicators were located at the edges of each strip/clip location and at the midpoint. Pressure was increased at _ inch water column (2.6 psf) with rebound to zero pressure after 3 and 6 inches water column.

B. Pull out Capacity of Metal Insert: This test was conducted to determine the pull resistance of the metal insert form the EPS foam. A self drilling screw was installed at 1 inch from the end and 24 inches from the end. In addition, pull tests were conducted to determine at what edge distance the full pull out value can be achieved.

GUIDELINE DIAGRAM

Results:

A. Negative Uniform Load Test: The three negative Uniform Load Test failed by bending failure of the metal strip/clip. The metal strip is located at the edge and at the midpoint of the assembly. The failure in all cases was by bending of the strip at the screw location. Results of the Negative Uniform Load Test are summarized in Table A.

B. Pull Out Capacity of Metal Insert: A self drilling screw was installed at the location specified. The screw was pulled directly in tension until the EPS foam failed. The results are summarized in Table B.

Analysis of Results:

The results indicate that the metal strip/clip yielding will limit the design as tested. The metal strip/clip bends about the screw attachment to the Styro-loc insert. The allowable load, based on the total surface width of 18 inches and the metal strip/clip spaced at 23 inches centers, is 6 inches of water or 31.2 pounds per square feet. This load causes the metal strip/clip to yield. The maximum pull out value for the Styro-loc insert is 227 pounds when loaded a minimum of 12 inches from any end. The load, when pulled at 1-inch from the end, averaged 88 pounds. The Styro-loc insert is located a minimum of 2-5/8 inches from the edge of the EPS foam. The EPS foam must be listed and be manufactured under a quality control program using a third party inspection agency.

TABLE A
Water
Load
Test 1
Test 2
Test 3
Column
(psf)
Ave.
1&2
Ave.
3&5
Ave.
6&7
4
Ave.
1&2
Ave.
3&5
Ave.
6&7
4
Ave.
1&2
Ave.
3&5
Ave.
6&7
4
0.5
2.6
0
0.001
0
0
0
0
0
0
0
0
0
0
1
5.2
0.007
0.001
0.002
0.015
0.004
0.002
0.006
0.036
0.001
0.002
0.003
0.081
1.5
7.8
0.013
0.007
0.009
0.118
0.009
0.005
0.009
0.112
0.001
0.005
0.006
0.250
2
10.4
0.017
0.011
0.012
0.136
0.016
0.009
0.013
0.187
0.009
0.009
0.013
0.345
2.5
13
0.028
0.021
0.017
0.258
0.022
0.012
0.017
0.247
0.018
0.012
0.018
0.400
3
15.6
0.043
0.033
0.021
0.376
0.032
0.019
0.023
0.415
0.028
0.019
0.023
0.450
0.5
2.6
0.005
0.003
0.004
0.008
0.002
0.004
0.008
0.021
0.003
0.004
0.002
0.090
3
15.6
0.043
0.031
0.022
0.375
0.031
0.019
0.023
0.410
0.030
0.019
0.025
0.466
3.5
18.2
0.048
0.040
0.025
0.489
0.039
0.028
0.028
0.460
0.040
0.028
0.032
0.512
4
20.8
0.064
0.057
0.035
0.510
0.051
0.037
0.036
0.514
0.052
0.037
0.040
0.560
4.5
23.4
0.080
0.073
0.051
0.545
0.063
0.047
0.044
0.558
0.054
0.047
0.049
0.605
5
26
0.103
0.084
0.065
0.690
0.079
0.065
0.060
0.628
0.082
0.065
0.068
0.670
5.5
28.6
0.122
0.121
0.080
0.750
0.100
0.081
0.068
0.670
0.088
0.081
0.068
0.690
6
31.2
0.152
0.135
0.033
0.810
0.121
0.098
0.075
0.715
0.096
0.098
0.082
0.720
0.5
2.6
0.010
0.015
0.009
0.052
0.006
0.011
0.013
0.045
0.016
0.011
0.015
0.270
6
31.2
0.153
0.139
0.099
0.815
0.148
0.122
0.103
0.750
0.095
0.122
0.091
0.750
7
36.4
1.065
1.001
8
41.6
1.615
1.251
9
46.8
1.565
1.501
10
52
1.815
1.751
11
57.2
Ultimate
11.5" = 59.8
11" = 57.2
11.5" = 59.8
Average
59

TABLE B
Load in (Pounds)
Test No
Load Applied
1" From End
Load Applied
24" From Each End
Load Applied
4" From End
Load Applied
8" From End
Load Applied
12" From End
1
88
235
135
2
86
222
187
3
90
225
218 (1)
Average
88
227
Mode of Failure
Insert Peeled Back Foam
Foam Sheared
Insert Peeled Back Foam
Insert Peeled Back Foam
Foam Sheared
Connection to the Styro-loc inset must be a minimum of 12 inches from the free end to develop full pull out of capacity. Appropriate safety factor should be applied to the peak value to determine allowable design value.


GUIDELINE DIAGRAM

TYPICAL PROPERTIES OF MODIFIED EXPANDED POLYSTYRENE FOAM BOARD
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Please give us a call if you have any questions.

Tested by:
Steve Berggren
Laboratory Supervisor

Reported by:
Ronald I. Ogawa, P.E.
Laboratory Consultant

Report Reviewed and Approved by:
David R. Macey
Laboratory Manager

RAMTECH LABORATORIES, INC.
14104 ORANGE AVENUE, PARAMOUNT, CALIFORNIA 90723 • TEL (310) 633-4824 • FAX (310) 633-4128