Single Fastener Timber Joint
The HO14+ program can be used to calculate the load-bearing capacity of a common single fastener in timber construction. In this calculation, the given angle between the applying force and the direction of the grain is taken into account. Under normal conditions, the failure of the fastener is preferred to the failure of the timber. Therefore, the program gives detailed information about the failure mechanism and suggests automatically a fastener diameter that is compatible with the given timber material thickness.
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- Softwood of the strength classes C14 to C50
- Hardwood of the strength classes D18 to D80
- Glulam of the strength classes GL20c/h to GL32c/h
- User-defined material
- Timber-to-timber connection
- Steel-to-timber connection
- Chord: continuous/with pinned joint/ending on the left/ending on the right
- Position of the chord: on top/on bottom
- With/without chord
- With/without diagonal strut, on the left/on the right
- Supported node
- Posts: axial forces
- Diagonal struts: axial force and shear force
- Chord timber-to-timber: moment load in the chord from external loading and eccentricity of the fasteners
- Dowel pins
- Fit bolts/bolts
- Nails (smooth/profiled)
- Special dowels
The load-bearing capacity of the fasteners is verified following Johansen’s theory (accurate verification method as per EN 1995, 8.3). Suspension effects can be taken into account, if applicable.
The design of the plate connection is based on the geometry of the section of the member connection and the permissible edge distances of the fasteners. The result provides an area over which the fasteners can be distributed in rows. The crack lines in the grain direction run in parallel to the edge of the component and are arranged symmetrically to the member axis. The crack lines transverse to the direction of force can optionally run perpendicular to the component edge or in parallel to the section at the member connection.
The permissible area for the arrangement of the fasteners in a timber-to-timber connection results from the intersection of the connected members and the minimum edge distances of the fasteners.
The crack lines in the direction of force run in parallel to the load-introducing component and are symmetrical to the member axis of the latter. The crack lines that are transverse to the direction of force run in parallel to the edge of the load-transferring component.
For the number of fasteners, at least two fasteners are assumed in the connection area. In the area of the continuous chord, at least four fasteners are arranged. Alternatively, a fastener alone can be provided in the connection area using the basic setting “Verification”. At least, four shear areas must be effective in this case. For nails and screws, a minimum quantity of two applies as a rule.
Based on the load-bearing capacity, the program determines the required number of fasteners, checks the minimum spacing to be complied with and performs the necessary verifications on the adjoining components in the area of the joint.
Document file formats
- DIN EN 1995 as well as DIN 1052
- ÖNORM EN 1995
- NTC EN 1995
- BS EN 1995
- PN EN 1995
Release 2023-2: FRILO presents a new program for the calculation of strut-and-tie models in reinforced concrete construction
FRILO Software GmbH has successfully delivered the software version 2023-2. With the update, the provider of innovative solutions for structural analysis and design is launching a new program that allows the generation of frameworks in reinforced concrete construction.
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At the joint stand of the Nemetschek Group, FRILO, SCIA and DC presented the software range for structural analysis and foundation engineering.
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