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Technical Specifications for Tapcon® Concrete Screws

Technical Specifications for Tapcon® Concrete Screws

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Technical Specifications

There are numerous technical specifications that must be considered when using Tapcon® screws. Determinations must be made on the diameter of the screw - standard or large diameter, length of the screw - ranging from 1-1/4" to 6", head style - hex slotted or flat phillips, material or coating - Blue Climaseal®, Zinc Plated Large Diameter, Envirex Coated Large Diameter or Stainless Steel, embedment depth - 1” minimum to 1-3/4” maximum, and type of base material - concrete, brick or block. Once all of these factors have been determined, you can find the expected holding values in the technical information below.

Anchor Length:

To determine the minimum length required, add the thickness of the material to be fastened and the minimum embedment (1”). To determine the maximum length required, add the thickness of the material to be fastened and the maximum embedment (1-3/4”).

Anchor Spacing:

Allowable Edge and Spacing Distances - in NORMAL WEIGHT CONCRETE

Parameter Anchor Diameter
(inches)
Full Capacity
(Critical Distance) (inches)
Reduced Capacity
(Minimal Distance) (inches)
Load Reduction Factor
Edge Distance - Tension 3/16 1-7/8 1

.71

1/4 2-1/2 1-1/4

.78

Edge Distance - Shear 3/16 2-1/4 1-1/8

.70

1/4 3 1-1/2

.59

Spacing between Anchors - Tension 3/16 3 1-1/2

.73

1/4 4 2

.66

Spacing between Anchors - Shear 3/16 3 1-1/2

.83

1/4 4 2

.82

Allowable Edge and Spacing Distances - in BLOCK

Parameter Anchor Diameter (inches) Full Capacity (Critical Distance) (inches) Reduced Capacity (Minimal Distance) (inches) Load Reduction Factor
Edge Distance - Tension 3/16 4 2 .91
1/4 4 2 .88
Edge Distance - Shear 3/16 4 2 .93
1/4 4 2 .80
Spacing between Anchors - Tension 3/16 3 1-1/2 1.00
1/4 4 2 .84
Spacing between Anchors - Shear 3/16 3 1-1/2 1.00
1/4 4 2 .81

Technical Information:  

Ultimate Load Values in 2000 PSI Concrete

Size Minimum Embedment Drill Bit Pull-Out (lbs.) Shear (lbs.)
3/16” 1” 5/32” 600 720
1/4” 1” 3/16” 750 900

Ultimate Load Values in Light Weight Block

Size Minimum Embedment Drill Bit Pull-Out (lbs.) Shear (lbs.)
3/16” 1” 5/32” 220 400
1/4” 1” 3/16” 250 620

 Ultimate Load Values in Medium Weight Block 

Size Minimum Embedment Drill Bit Pull-Out (lbs.) Shear (lbs.)
3/16” 1” 5/32” 340 730
1/4” 1”         3/16” 500 1000

Values shown are average ultimate values and are offered only as a guide and are not guaranteed.  A safety factor of 4:1 or 25% is generally accepted as a safe working load.  Reference should be made to applicable codes for the specific working.

Part Numbers

Large Diameter Part Numbers
Blue
Climaseal
Part #
Stainless
Steel
Part #
Head
Style
Screw
Diameter
(inches)
Screw
Length
(inches)
Drill
Bit Size
(inches)
Socket
Size/
Bit Tip
Fixture
Hole Size
(inches)
TCF316114 TCFS316114 Flat Phillips 3/16 1-1/4 5/32 #2 1/4
TCF316134 TCFS316134 Flat Phillips 3/16 1-3/4 5/32 #2 1/4
TCF316214 TCFS316214 Flat Phillips 3/16 2-1/4 5/32 #2 1/4
TCF316234 TCFS316234 Flat Phillips 3/16 2-3/4 5/32 #2 1/4
TCF316314 TCFS316314 Flat Phillips 3/16 3-1/4 5/32 #2 1/4
TCF316334 TCFS316334 Flat Phillips 3/16 3-3/4 5/32 #2 1/4
TCF3164 Flat Phillips 3/16 4 5/32 #2 1/4
TCF14114 TCFS14114 Flat Phillips 1/4 1-1/4 3/16 #3 5/16
TCF14134 TCFS14134 Flat Phillips 1/4 1-3/4 3/16 #3 5/16
TCF14214 TCFS14214 Flat Phillips 1/4 2-1/4 3/16 #3 5/16
TCF14234 TCFS14234 Flat Phillips 1/4 2-3/4 3/16 #3 5/16
TCF14314 TCFS14314 Flat Phillips 1/4 3-1/4 3/16 #3 5/16
TCF14334 TCFS14334 Flat Phillips 1/4 3-3/4 3/16 #3 5/16
TCF144 TCFS144 Flat Phillips 1/4 4 3/16 #3 5/16
TCF145 TCFS145 Flat Phillips 1/4 5 3/16 #3 5/16
TCF146 TCFS146 Flat Phillips 1/4 6 3/16 #3 5/16
TCH316114 Hex Washer 3/16 1-1/4 5/32 1/4" 1/4
TCH316134 Hex Washer 3/16 1-3/4 5/32 1/4" 1/4
TCH316214 Hex Washer 3/16 2-1/4 5/32 1/4" 1/4
TCH316234 Hex Washer 3/16 2-3/4 5/32 1/4" 1/4
TCH316314 Hex Washer 3/16 3-1/4 5/32 1/4" 1/4
TCH316334 Hex Washer 3/16 3-3/4 5/32 1/4" 1/4
TCH3164 Hex Washer 3/16 4 5/32 1/4" 1/4
TCH14114 TCHS14114 Hex Washer 1/4 1-1/4 3/16 5/16" 5/16
TCH14134 TCHS14134 Hex Washer 1/4 1-3/4 3/16 5/16" 5/16
TCH14214 TCHS14214 Hex Washer 1/4 2-1/4 3/16 5/16" 5/16
TCH14234 TCHS14234 Hex Washer 1/4 2-3/4 3/16 5/16" 5/16
TCH14314 TCHS14314 Hex Washer 1/4 3-1/4 3/16 5/16" 5/16
TCH14334 TCHS14334 Hex Washer 1/4 3-3/4 3/16 5/16" 5/16
TCH144 TCHS145 Hex Washer 1/4 4 3/16 5/16" 5/16
TCH145 TCHS146 Hex Washer 1/4 5 3/16 5/16" 5/16
TCH146 TCHS146 Hex Washer 1/4 6 3/16 5/16" 5/16
LDT38134 LDTS38134 Hex Washer 3/8 1-3/4 5/16 9/16" 1/2
LDT38212 LDTS38212 Hex Washer 3/8 2-1/2 5/16 9/16" 1/2
LDT383 LDTS383 Hex Washer 3/8 3 5/16 9/16" 1/2
LDT384 LDTS384 Hex Washer 3/8 4 5/16 9/16" 1/2
LDT385 LDTS385 Hex Washer 3/8 5 5/16 9/16" 1/2
LDT12212 LDST12212 Hex Washer 1/2 2-1/2 7/16 3/4" 5/8
LDT123 LDTS123 Hex Washer 1/2 3 7/16 3/4" 5/8
LDT124 LDTS124 Hex Washer 1/2 4 7/16 3/4" 5/8
LDT125 LDTS125 Hex Washer 1/2 5 7/16 3/4" 5/8
LDT126 Hex Washer 1/2 6 7/16 3/4" 5/8
LDT583 Hex Washer 5/8 3 1/2 15/16" 3/4
LDT584 Hex Washer 5/8 4 1/2 15/16" 3/4
LDT585 Hex Washer 5/8 5 1/2 15/16" 3/4
LDT586 Hex Washer 5/8 6 1/2 15/16" 3/4
LDT34412 Hex Washer 3/4 4-1/2 5/8 15/16" 7/8
LDT34512 Hex Washer 3/4 5-1/2 5/8 15/16" 7/8
LDT34614 Hex Washer 3/4 6-1/4 5/8 15/16" 7/8