RSS Rugged Structural Screw

 

Self-tapping
W-Cut™ thread design,
ZipTip™
Climatek™ coated
May be used for Lag screw replacement
 

GRK’s RSS™ Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks.

RSS™ screws which are 3"1/8 and longer have a six threaded CEE thread that enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increasing the screw’s drawing strength. The CEE thread also reduces the likelihood of splitting the wood and the friction on the screw shank which can result in lowering the driving torque.

Our round head with built-in shield (washer type head) has no sharp edges such as on conventional lag screws. The added shoulder (nominal diameter) underneath the washer has the ability to center the RSS™ screw in pre-drilled hardware like hinges and connector plates. Short lengths of the RSS™ may also be used to install wire diamond mesh for stucco buildings.

The #30 Star Drive will deliver approximately 650 lbf of energy, eliminating the need to drill a pilot hole.

The RSS™ screw is the only lag screw replacement of its kind.

GRK - RSS™ Rugged Structural Screw

RSS™ Technical 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.

Installation procedure for Fasteners

Use appropriate driver bit.
No pre-drilling except where wood limitations require.
DO NOT use deck cleaners which contain bleach with coated metals.
Always consult wood supplier's / manufacturer's recommendations.
Metal to wood connections: avoid damage to the coating by pre-drilling the metal.
Cedar & Redwood: For best results use PHEinox Stainless Steel. If using coated fasteners, seal wood immediately with a quality sealer to lessen the likelihood of tanic acid stains.

Mechanical Data Supported by ICC: ESR-2442   ICC-ES/ESR-2442.pdf
 

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.

 

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