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Home Builder's Corner Technical Data

Technical Data

Jump to Technical Data for GRK's:

• RSS™ Structural Screw
• R4™ Multi Purpose Screw
• Caliburn™ Concrete Screw

RSS™ Rugged Structural Screw Test Data

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:
ICC, CNLA, TÜV, Ü, ISO, DAR.

TABLE 1 – RSS™ FASTENER SPECIFICATIONS
Fas. Desig.	Over-all Len.1 (in.)	Len. of Thread2 (in.)	Minor Thread Diam.3 (in.)	Shank Diam.3 (in.)	Out-side Thread Diam.3 (in.)	Steel Strength
						Bending Yield Str.4 Fyb(psi)	Tensile (lbf) [psi]	Shear (lbf) [psi]
RSS™
1/4 x 2"1/2	2 3/8	1 1/2	0.150	0.169	0.239	170,427	3,336 [188,301]	2,264 [127,792]
1/4 x 2"3/4	2 3/4	1 3/4
1/4 x 3"1/8	3 1/8	2
1/4 x 3"1/2	3 1/2	2 3/8
5/16 x 2"1/2	2 3/8	1 1/2	0.174	0.199	0.280	190,920	4,247 [178,051]	2,948 [123,592]
5/16 x 2"3/4	2 3/4	1 3/4
5/16 x 3"1/8	3 1/8	2 1/8
5/16 x 3"1/2	3 1/2	2 1/2
5/16 x 4"	3 7/8	2 3/4
5/16 x 5"1/8	5	3 1/2
5/16 x 6"	5 7/8	3 7/8
3/8 x 3"1/8	3 1/8	2 1/8	0.191	0.223	0.310	178,080	5,824 [203,809]	3,695 [129,305]
3/8 x 4"	3 7/8	2 3/4
3/8 x 5"1/8	5 1/8	3 1/2
3/8 x 6"	5 7/8	4
3/8 x 7"1/4	7	4 1/2
3/8 x 8"	7 7/8	4 3/8
3/8 x 10"	9 3/4	5
3/8 x 12"	11 7/8	5 7/8
3/8 x 14"1/8	14 1/8	5 7/8
3/8 x 16"	15 5/8	5 3/4
RSS™ LPS
1/4 x 6"	5 7/8	2 7/8	0.152	0.172	0.238	172,620	3,155 [172,950]	2,000 [109,635]
1/4 x 8"	7 7/8	2 7/8
1/4 x 9"	9	2 7/8
1/4 x 10"	9 7/8	2 7/8
1/4 x 11"	10 7/8	2 7/8
1/4 x 12"	11 3/4	2 7/8
1/4 x 14"	13 7/8	2 7/8
RSS™ LTF
3/8 x 8"	7 7/8	3 7/8	0.191	0.220	0.310	167,580	5,144 [179,350]	3,284 [114,525]
3/8 x 10"	9 7/8	3 7/8
3/8 x 12"	11 3/4	3 7/8
3/8 x 15"	14 3/4	3 7/8
3/8 x 18"	18	3 7/8
3/8 x 20"	19 5/8	3 7/8
PHEinox RSS™
1/4 x 2"1/2	2 3/8	1 1/2	0.152	0.170	0.237	111,460	1,886 [103,799]	1,640 [90,260]
1/4 x 3"1/8	3 1/8	2
5/16 x 2"1/2	2 3/8	1 5/8	0.171	0.195	0.276	118,360	2,419 [104,767]	2,006 [86,880]
5/16 x 3"1/8	3 1/8	2 1/8
5/16 x 4"	3 7/8	2 1/2
5/16 x 5"1/8	5 1/8	3 3/8
5/16 x 6"	5 7/8	3 7/8
RSS™ JTS
1/4 x 3"3/8	3 3/8	1 3/8	0.153	0.173	0.240	226,373	3,312 [180,999]	2,308 [126,131]
1/4 x 5"	5	1 5/8
1/4 x 6"3/4	6 3/4	1 1/2
for S1: 1 inch = 25.4 mm; 1 psi = 6.9 kPa. ULTIMATE LOAD VALUES Tensile and Shear 1 Overall length of fastener is measured from the underside of the head to bottom of the tip. See Figure 1. 2 Length of thread includes tip. See detailed illustration, Figure 1. 3 Minor thread, shank and outside thread diameters are shown in table without manufacturing tolerances. 4 Bending yield strength determined in accordance with ASTM D 1575 using the minor thread diameter.

FIGURE 1 – RSS™ FASTENER DIMENSIONS

TABLE 2 – RSS™ FASTENER WITHDRAWAL AND PULL-THROUGH
		RSS™ ULTIMATE WITHDRAWAL VALUES(W) [Withdrawal Values(W) are in Pounds per Inch of Thread Penetration into Side Grain of Main Member]	RSS™ ULTIMATE PULL-THROUGH VALUES(P) [Pull-Through Values(P) are in Pounds per Inch of Side Member Thickness]
Fastener Designation and Diameter Ø		Withdrawal, W (lbs./in.) For Specific Gravities Of: 0.55	Pull-Through, P (lbs./in.) For Specific Gravities Of: 0.55
RSS™	Ø 1/4	932	1840
	Ø 5/16	1136	2697
	Ø 3/8	1293	2332
RSS™ LPS	Ø 1/4	1006	2643
RSS™ LTF	Ø 3/8	1082	2493
PHE RSS™	Ø 1/4	936	2085
	Ø 5/16	1012	1702
RSS™ JTS	Ø 1/4	954	2443
		For S1: 1 inch = 25.4 mm; 1lbf/in = 175.127 N/m. 1Fastener withdrawal was tested in accordance with ASTM D 1761. 2Withdrawal values (W) shall be multiplied by the length of thread penetration in the main member (including tip).	For S1: 1 inch = 25.4 mm; 1lbf/in = 175.127 N/m. 1Fastener pull-through testing was performed in accordance with ASTM D 1037 with 3/4" thick side members.
		These figures are only offered as a guide and are not reduced by any safety factor. For safety factor requirements in your area, contact your local building official, architect or engineer.

TABLE 3 – RSS™ ULTIMATE LATERAL VALUES(Z) FOR SINGLE SHEAR (TWO-MEMBER) CONNECTIONS [For Sawn Lumber or SCL with both Members of Identical Specific Gravity]
Fastener Designation		Side Member Thickness ts (inches):	Fastener Penetration p (inches):	Ultimate Lateral Value, Z (pounds) For Specific Gravities Of:
				0.55
				Parallel To Grain, Z‖	Perpendicular to Grain, Z⊥
RSS™	1/4 x 2"1/2	3/4	1 5/8	876	875
	1/4 x 2"3/4	3/4	2
	1/4 x 3"1/8	3/4	2 3/8
	1/4 x 3"1/2	3/4	2 3/4
	5/16 x 2"1/2	3/4	1 5/8	1068	916
	5/16 x 2"3/4	3/4	2	1088	890
	5/16 x 3"1/8	3/4	2 3/8
	5/16 x 3"1/2	3/4	2 3/4
	5/16 x 4"	1 1/2	2 3/8	1667	1417
	5/16 x 5"1/8	1 1/2	3 1/2	1857	1286
	5/16 x 6"	2	3 7/8	2360	1446
	3/8 x 3"1/8	3/4	2 3/8	1253	1098
	3/8 x 4"	1 1/2	2 3/8	1443	1454
	3/8 x 5"1/8	1 1/2	3 5/8	1369	1321
	3/8 x 6"	2	3 7/8	1625	1440
	3/8 x 7"1/4	2 3/4	4 1/4	2964	1518
	3/8 x 8"	3 1/2	4 3/8
	3/8 x 10"	3 1/2	6 1/4
	3/8 x 12"	3 1/2	8 3/8
	3/8 x 14"1/8	3 1/2	10 5/8
	3/8 x 16"	3 1/2	12 1/8
RSS™ LPS	1/4 x 6"	3	2 7/8	1789	1093
	1/4 x 8"	5	2 7/8
	1/4 x 9"	6	3
	1/4 x 10"	7	2 7/8
	1/4 x 11"	8	2 7/8
	1/4 x 12"	9	2 3/4
	1/4 x 14"	11	2 7/8
RSS™ LTF	3/8 x 8"	4	3 7/8	2779	2008
	3/8 x 10"	6	3 7/8
	3/8 x 12"	8	3 3/4
	3/8 x 15"	11	3 3/4
	3/8 x 18"	14	4
	3/8 x 20"	16	3 5/8
PHEINOX RSS™	1/4 x 2"1/2	3/4	1 5/8	1077	925
	1/4 x 3"1/8	3/4	2 3/8
	5/16 x 2"1/2	3/4	1 5/8	906	873
	5/16 x 3"1/8	3/4	2 3/8
	5/16 x 4"	1 1/2	2 3/8	1884	1361
	5/16 x 5"1/8	1 1/2	3 5/8
	5/16 x 6"	2	3 7/8	2246	1791
JTS	1/4 x 3"3/8	1 3/4	1 5/8	830	983
	1/4 x 5"	1 3/4	3 1/4	1203	1184
	1/4 x 6"3/4	1 3/4	5
for S1: 1 inch = 25.4 mm 1 Lateral load testing was performed in accordance with ASTM D 1761. These figures are only offered as a guide and are not reduced by any safety factor. For safety factor requirements in your area, contact your local building official, architect or engineer.

R4™ Multi Purpose Screw Test Data

Mechanical Data Supported by ICC:                     ESR-2442   www.icc-es.org
R4™ Shear Test Results
Diameter	Avg. Ultimate Load (lbf)	Wood Failure Rate
#4	139	50%
#6	301	70%
#8	361	30%
#9	452	65%
#10	687	75%
#12	720	75%

• Test ASTM D 1761 Lateral Resistance/Slip, Wood to Wood connection.
• Testing stopped when screw displaced 1/8" or upon wood failure. Wood failed in majority of tests prior to screw failure. Test conducted in wood with specific gravity 0.42.
• Please note, the above stated values are ultimate loads. For construction design purposes an applicable safety margin should be applied. An architect or engineer should be consulted for this.

Caliburn™ Concrete Screw Test Data

TECHNICAL DATA - Caliburn™
Screw Size	Embed. Depth	2000 psi Concrete		Bit Size	Drill Size
		Tension Pullout lbf	Shear lbf
1/4 x 1"3/4	1"1/2	1655	1505	T25/ T30	3/16"
1/4 x 2"1/4	2"	2120	2055	T25/ T30	3/16"
19/64 x 2"3/4	2"1/2	2209	3135	T40	1/4"
19/64 x 3"1/2	3"1/4	2523	3200	T40	1/4"
19/64 x 5"	4"3/4	5724	3300	T40	1/4"

NOTE:

• All values are based on close tolerance holes drilled a minimum of 1/4" deeper than embedment depth, using GRK drill bits.
• All listed values shown at left are average pullout and shear values for GRK's Caliburn™, Caliburn™ PH and Caliburn™ XL screws. Values will vary depending on a number of factors, including the quality of the concrete and size of the drill hole.
• These figures are only offered as a guide, are not guaranteed by GRK and not reduced by any safety factor.
• For safety factor requirements in your area, contact your local building official architect or engineer. Testing was performed according to ASTM standard E-488-96. For specific calculations refer to ACI #318 Appendix D

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