BS EN ISO 7236:2016 pdf download – Ships and marine technology — Inland navigation vessels — Mounting attachments for demountable signal masts for push-tows (ISO 7236:2014)
1 Scope
This International Standard applies to mounting attachments for demountable masts with an integral mast lower part for the placing of lights on push barges. It specifies construction, dimensions,manufacture, arrangement, and means of attachment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications
EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy structural steels
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
mounting attachment
device comprising of a mast stand and mast clamp which are arranged on the barge in such a way that they can maintain a signal mast in the specified position
mast stand
device fixed to the deck which accepts the lower part of the signal mast and secures it against rotation about the vertical mast axis
mast clamp
device which secures the top of the lower portion of the signal mast
mast lower part
lower part of the signal mast which is inserted into the mounting attachment
4 Technical requirements
General tolerances: ISO 2768:— c.
The requirements relate to construction, dimensions, design, arrangement, and means of attachment.
4.1 Dimensions
The mounting attachment is not expected to conform to the design illustrated in this International Standard; compliance is only required in the case of the dimensions specified.
4.2 Mast stand
4.3 Mast clamp
The clamp is shown to be attached using screws and nuts/wing nuts. Any equivalent means of attachment is permitted provided that the mast is held securely.
Only captive screws, nuts, or wing nuts shall be used.
4.4 Mounting attachment
The mounting attachment consists of the mast stand and a mast clamp.
The mast stand shall be positioned so that the signal mast bearing pins are precisely aligned parallel to the longitudinal and transverse axes of the vessel. In addition, the mast stand and mast clamp shall be arranged in such a way that axis of the lower part of the signal mast is perpendicular to the design waterline plane.
The arrangement illustrated in Figure 3 is an example of this.
4.5 Mounting attachment arrangement on the push barge
The mounting attachments shall be arranged on the push barge as shown in Figure 4.
The mounting attachments fitted to the vessel sides shall be arranged so that the masts can be mounted parallel to the longitudinal vertical plane of the vessel. For safety reasons, they shall not be positioned within the clear width of the walkway and shall be arranged to ensure an easy mounting of the mast.
The attachments fitted in the centre of the vessel can be rotated by 90° (e.g. in restricted conditions) so that the masts can be mounted parallel to the transverse vertical plane of the vessel.
4.6 Mast
Only the dimensions of the lower end of the mast (mast lower part) are specified in Annex A. The upper part of the mast, its height, the navigation light arrangement, and other characteristics are not covered by this International Standard. They are governed by the shipping regulations of the corresponding navigation zone.
5 Material
Weldable steel is as specified in EN 10025-2.
The screws, nuts, or bolts used for the clamp shall be made of stainless steel or other non-corrodible materials.
6 Testing
For the purposes of this International Standard, test the technical requirements as specified in this International Standard by visual examination and measurement.BS EN ISO 7236 pdf download.