Rothoblaas Catalogue 2019

TECHNICAL ASPECTS

90°

GEOMETRY AND MECHANICAL CHARACTERISTICS

45°

t

1

VGS CONNECTOR Nominal diameter

d

k

d 1 d k d 2

9

11

[mm] [mm] [mm] [mm] [mm]

V G S

Head diameter Core diameter Head thickness

16,0

19,3

X X

5,9 6,5 5,0

6,6 8,2 6,0

t 1

d v

Pre-bored hole diameter* Characteristic value for the yield moment Characteristic value of extrac tion strength

M y,k

[Nmm]

27244,1

45905,4

[N/mm 2 ]

f ax,k

11,7

11,7

L

b

f tens,k

Characteristic tensile strength

[kN]

25,4

38,0

[N/mm 2 ]

f y,k

Characteristic yield strength

1000

1000

* Pre-bored hole required for connectors with Ø11 ≥ 400 mm

d d

2

1

EFFECTIVE THREAD USED IN CALCULATION

b = L - 10 mm represents the entire length of the threaded part. S g = (L - 10 mm - 10 mm - Tol.) / 2 represents the partial length of the threaded part net of a laying tolerance (Tol.) of 10 mm.

Tol.

10

10

S

S

g

g

b

L

GENERAL PRINCIPLES:

- Characteristic values consistent with EN 1995:2014 and in accordance with ETA-11/0030. - Design values can be obtained from characteristic values as follows:

The coefficients γ m and k mod should be taken according to the current regulations used for the calculation. - For the mechanical strength values and the geometry of the screws, reference was made to ETA-11/0030. - For the calculation process a timber density ρ k = 385 kg/m 3 has been considered. Characteristic resistances can also be considered as valid for larger densities, for the purposes of safety. - Dimensioning and verification of the timber elements must be carried out separately. - The shear characteristic resistances are calculated for screws inserted without pre-drilling holes. In the case of screws inserted with pre-drilling holes, greater resistance values can be obtained. - The extraction and shear values were calculated considering the centre of gravity of the connector placed in correspondence with the shear plane. - The characteristic resistances were calculated using solid wood or glulam. In the case of joints with CLT elements, the resistance values may be different and should be calculated on the basis of the characteristics of the panel and the connection configuration. Full technical data is available in the website www.rothoblaas.com.

186 | VGS | COMPLEMENTARY PRODUCTS