NO PRE-DRILLING FOR R4, RSS, CABINET AND TRIM HEAD SCREWS, EXCEPT WHERE WOOD LIMITATIONS REQUIRE. ALWAYS PLACE DECK BOARDS WITH OUTER EDGE OF GROWTH RINGS FACING UP. DO NOT USE DECK CLEANERS WHICH CONTAIN BLEACH WITH COATED METALS. CONSULT WOOD SUPPLIERS / MANUFACTURER’S RECOMMENDATIONS. DECKING SCREWS SHOULD BE COUNTERSUNK 1/8".
GRK Fasteners utilizes strict quality control procedures. Every batch of screws produced is independently random sampled and quality controlled to the highest standards.
Accreditations for independent test laboratories include:
ISO, ICBO, ICC, CNLA, TÜV, DAR, Ü
Technical Data
|
Pull
Out Test Results for RSS Structural Screws
|
Sidegrain: |
Endgrain: |
| 5/16 x 2 1/2" |
791
kg/1740lb |
556
kg/1223 lb |
| 5/16 x 3 1/8" |
934
kg/2054 lb |
1055
kg/2321 lb |
| 5/16 x 4" |
1202
kg/2644 lb |
1166
kg/2565 lb |
| 5/16 x 5 1/8" |
1248
kg/2745 lb |
1286
kg/2829 lb |
| 5/16 x 6" |
1645
kg/3619 lb |
1601
kg/3522 lb |
| 5/16 x 7 1/4" |
1801
kg/3962 lb |
1782
kg/3920 lb |
| 3/8 x 8" |
1984
kg/4364 lb |
2119
kg/4661 lb |
| 3/8 x 10" |
2200
kg/4840 lb |
2320
kg/5104 lb |
| 3/8 x 12" |
2390
kg/5258 lb |
2293
kg/5044 lb |
| 3/8 x 14 1/8" |
2412
kg/5306 lb |
2351
kg/5172 lb |
| 3/8 x 16" |
2723
kg/5990 lb |
2615
kg/5753 lb |
**
test stopped after wood failure or 1/8" screw
displacement.
|
Shear
Strength Test Results for RSS Structural Screws.
|
|
Endgrain: |
| 5/16 x 2 1/2" |
377
kg/829 lb |
556kg/1223
lb |
| 5/16 x 3 1/8" |
385
kg/847 lb |
1055
kg/2321 lb |
| 5/16 x 4" |
604
kg/1328 lb |
1166
kg/2565 lb |
| 5/16 x 5 1/8" |
605
kg/1331 lb |
1286
kg/2829 lb |
| 5/16 x 6" |
607
kg/1335 lb |
1601
kg/3522 lb |
| 5/16 x 7 1/4" |
583
kg/1282 lb |
1782
kg/3920 lb |
| 3/8 x 8" |
630
kg/1386 lb |
2119
kg/4661 lb |
| 3/8 x 10" |
684
kg/1504 lb |
2320
kg/5104 lb |
| 3/8 x 12" |
864
kg/1900 lb |
2293
kg/5044 lb |
| 3/8 x 14 1/8" |
890
kg/1958 lb |
2351
kg/5172 lb |
| 3/8 x 16" |
939
kg/2065 lb |
2615
kg/5753 lb |
** test stopped after wood failure or 1/8" screw displacement.
|
|
Head
Pull Through Test Results for RSS Structural Screws.
| 5/16" screws |
avg. 825 lbs |
| Shaft Diameter |
0.198" |
| Head Diameter |
0.616" |
| |
|
| 3/8" screws |
avg. 889 lbs |
| Shaft Diameter |
0.220" |
| Head Diameter |
0.711" |
**
test stopped after wood failure or 1/8" screw
displacement.
|
Shear
Test Result for R4 Multipurpose Screws
| #4 |
139 lb |
| #6 |
301 lb |
| #8 |
361 lb |
| #9 |
452 lb |
| #10 |
687 lb |
| #12 |
720 lb |
**
test stopped after wood failure or 1/8" screw
displacement.
|
|
Minimum
Tensile Strength
GRK Spec:
139,000 PSI
Code
Spec: 45,000 PSI
|
Minimum Bending Angle
GRK Spec:
35 degrees
Code Spec:
15 degrees
|
|
Bending Yield Moment Test for
RSS Structural Screws
5/16":
159,073 PSI
3/8":
177,241 PSI
|
GRK Certifications include:
ISO 9001
ICBO / ICC
Ü – German Institute for Building Technology
|
|
All
tests were conducted at independent laboratories in the
United States, Germany and Taiwan. Test were conducted
in accordance with ASTM and/or DIN norms. Testing is
ongoing and is conducted on every production series.
Laboratory accreditations include ICBO, ICC, CNLA, TÜV, Ü, ISO, DAR.
|
| |
|
