ESCRFTZ

Fully Threaded Cylinder Head Structural Screw

The ESCRFTZ cylindrical head structural wood screw with full thread is designed for timber framing, framework and reinforcement. This screw can be used for a wide range of applications in professional wood construction.
 

CE-merket
Avtalegrunnlag
Anvendelsesklasse 2
Yellow electro-galvanized steel
Indoor

Produktinformasjon

Bilder

Egenskaper

Material

  • Hardened carbon steel
  • Electrogalvanized yellow passivated

Advantages

  • Cylinder head: ideal for discreet timber/timber assembly with head flush with surface or sunk into timber 
  • Full asymetrical thread for a maximum withdrawal capacity, allows compressive load bearing
  • Torx driven: reduces the wear of the bit

Applikasjoner

Suitable for

  • Solid Timber, Glulam timber, CLT, Wood-based panels

When to use

  • Timber to timber assembly
  • Timber reinforcement (to transversile tension or compression)
  • Crossed pair of screws assembly for optimal capacity

Tekniske data

Dimensjoner

Dimensjoner

Art. nr. Dimensjoner [mm] Bit Box Quantity
d l dh d1 lg
ESCRFTZ8.0X120812010.25.2110T-4050
ESCRFTZ8.0X140814010.25.2130T-4050
ESCRFTZ8.0X160816010.25.2150T-4050
ESCRFTZ8.0X180818010.25.2170T-4050
ESCRFTZ8.0X200820010.25.2190T-4050
ESCRFTZ8.0X220822010.25.2210T-4050
ESCRFTZ8.0X240824010.25.2230T-4050
ESCRFTZ8.0X260826010.25.2250T-4050
ESCRFTZ8.0X280828010.25.2270T-4050
ESCRFTZ8.0X300830010.25.2290T-4050
ESCRFTZ8.0X350835010.25.2340T-4050
ESCRFTZ8.0X400840010.25.2390T-4050

Produktkarakteristiske egenskaber

Art. nr. Yield Moment – My,k [Nm] Karakteristisk uttrekks parameter - fax,k,90° [N/mm²] Karakteristisk trekkstyrke - ftens,k [kN] Torsional Strength ftor,k [kN]
ESCRFTZ820.313.124.125.8

Installasjon

Installasjon

Spacing and Edge distances - Shear loaded screws

Art. nr. Minimum edge distances and spacing for shear loaded screws [mm]
Angle between load and grain = 0° Angle between load and grain = 90°
a1.0 a2.0 a3.t.0 a3.c.0 a4.t.0 a4.c.0 a1.90 a2.90 a3.t.90 a3.c.90 a4.t.90 a4.c.90
ESCRFTZ8.0X120------------
ESCRFTZ8.0X140------------
ESCRFTZ8.0X160------------
ESCRFTZ8.0X180------------
ESCRFTZ8.0X200------------
ESCRFTZ8.0X220------------
ESCRFTZ8.0X240------------
ESCRFTZ8.0X260------------
ESCRFTZ8.0X280------------
ESCRFTZ8.0X300------------
ESCRFTZ8.0X350------------
ESCRFTZ8.0X400------------
ESCRFTZ8------------

a1 and a2 can be multiplied by 0.85 for panel/timber assembly, and by 0.7 for steel/timber assembly.

Spacing and edge distances - Axially loaded screws

Art. nr. Minimum edge distances and spacing for axially loaded screws [mm]
a1 a2 a3.c a4.c
ESCRFTZ8.0X120----
ESCRFTZ8.0X140----
ESCRFTZ8.0X160----
ESCRFTZ8.0X180----
ESCRFTZ8.0X200----
ESCRFTZ8.0X220----
ESCRFTZ8.0X240----
ESCRFTZ8.0X260----
ESCRFTZ8.0X280----
ESCRFTZ8.0X300----
ESCRFTZ8.0X350----
ESCRFTZ8.0X400----
ESCRFTZ8----

Abacus

Timber to Timber characteristic capacities

Art. nr. Product characteristic capacities - Timber to Timber C24
Axial resistance Shear resistance parallel to the grain depending of t1 [Rv.0.k] [kN] Shear resistance perpendicular to the grain depending of t1 [Rv.90.k] [kN]
t1 [mm] Rax.k [kN] 35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] ≥100 [mm] 35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] ≥100 [mm]
ESCRFTZ8.0X120605.244.474.684.684.684.684.68-3.633.824.024.094.023.82-
ESCRFTZ8.0X140706.294.744.944.944.944.944.944.943.94.094.294.354.354.354.09
ESCRFTZ8.0X160807.3455.25.25.25.25.25.24.164.354.554.614.614.614.61
ESCRFTZ8.0X180908.385.265.465.465.465.465.465.464.424.614.814.874.874.874.87
ESCRFTZ8.0X2001009.435.525.735.735.735.735.735.734.654.875.075.145.145.145.14
ESCRFTZ8.0X22011010.485.785.995.995.995.995.995.994.655.035.335.45.45.45.4
ESCRFTZ8.0X24012011.536.056.256.256.256.256.256.254.655.035.435.565.565.565.56
ESCRFTZ8.0X260----------------
ESCRFTZ8.0X280----------------
ESCRFTZ8.0X30015014.676.336.746.746.746.746.746.744.655.035.435.565.565.565.56
ESCRFTZ8.0X350----------------
ESCRFTZ8.0X400----------------
ESCRFTZ8----------------

These capacities are valid for:

  • Timber element under the head with thickness ≤ t1 disclosed in adjacent column
  • Screw axis between 45° and 90° from timber grain for ESCR(XXX), and 90° from timber grain for all other screws.

For tightening screws (partially threaded), t1 dimension is the maximum thickness of the under-head timber member for which the thread is fully in the pointside timber member, for an optimum installation and tightening.

The shear capacities are given for several timber thicknesses t1 of the under-head member under the following configurations:

  • Load axis at 0° from both timber grains Rv.0°.k
  • Load axis at 90° from both timber grains Rv.90°.k

These capacities are valid for C24 timber grades or higher
The pre-drilled hypothesis for capacity and distances calculation is fulfilled.
For partial threaded screws, capacities are only given for configurations where the thread is less than 5mm in under-head timber member, in order to achieve optimum installation and tightening.
Clause (2) in 8.3.1.2 from EN1995-1-1:2004+A2:2014 about embedment length is ignored in these calculations.

Crossed pairs of screws - characteristic capacities

Art. nr. Crossed pair of screws - characteristic capacities
Header Joist Installation distance Characteristic capacities (Pull-out / Buckling) Rv.pair = min(Rw.k.pair ; Rbuck.k.pair) [kN]
bh min [mm] hj min [mm] 1 pair 2 pairs m [mm] mi [mm] 1 pair 2 pairs
bj min [mm] bj min 2 [mm] Rw.k.pair [kN] Rbuck.k.pair [kN] Rw.k.pair [kN] Rbuck.k.pair [kN]
ESCRFTZ8.0X120641288412468737.413.7 + 13.99 /kmod13.826.91 + 26.11 /kmod
ESCRFTZ8.0X140641288412468738.894.44 + 13.99 /kmod16.598.29 + 26.11 /kmod
ESCRFTZ8.0X1606712884124687310.375.18 + 13.99 /kmod19.359.67 + 26.11 /kmod
ESCRFTZ8.0X1807414084124687311.855.92 + 13.99 /kmod22.1211.06 + 26.11 /kmod
ESCRFTZ8.0X2008115484124758013.336.66 + 13.99 /kmod24.8912.44 + 26.11 /kmod
ESCRFTZ8.0X2208816884124828714.827.41 + 13.99 /kmod27.6513.82 + 26.11 /kmod
ESCRFTZ8.0X2409518284124899416.38.15 + 13.99 /kmod30.4215.21 + 26.11 /kmod
ESCRFTZ8.0X260102196841249610117.788.89 + 13.99 /kmod33.1816.59 + 26.11 /kmod
ESCRFTZ8.0X2801092108412410310819.269.63 + 13.99 /kmod35.9517.97 + 26.11 /kmod
ESCRFTZ8.0X3001172258412411111620.7410.37 + 13.99 /kmod38.7119.35 + 26.11 /kmod
ESCRFTZ8.0X3501342608412412813324.4512.22 + 13.99 /kmod45.6322.81 + 26.11 /kmod
ESCRFTZ8.0X4001522958412414615128.1514.07 + 13.99 /kmod52.5426.27 + 26.11 /kmod
ESCRFTZ8----------

Sertifiseringer

Ytelses Erklæring (DoP)

European Technical Assessment (ETA)

Contact

Simpson Strong-Tie Norge

Simpson Strong-Tie c/o Christiania Spigerverk

Org.nr: 9672 09 562
Smalvollveien 58
0667 Oslo
Norge