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IEEE Guide to the Assembly and Erection of Metal Transmission Structures, 1996
- Tile Page
- Introduction
- Participants
- CONTENTS
- 1. Overview [Go to Page]
- 1.1 Scope
- 1.2 Purpose
- 1.3 Application
- 1.4 Safety
- 1.5 Legal disclaimer
- 2. References
- 3. Definitions
- 4. Project planning
- 5. Structure design considerations [Go to Page]
- 5.1 Construction and maintenance loads [Go to Page]
- a) Partially assembled lattice structure sections will be subjected to dead-weight loads, dynamic...
- b) Members on which one or more workers are expected to climb or stand should be designed for a m...
- Figure 1— Portions of a structure subjected to additional loads due to one or more workers [Go to Page]
- c) Portions of a structure may be subjected to additional loads while they support one or more wo...
- d) If fall arrest systems are required, attachment points should be designed for the anticipated ...
- e) Rigging attachment points should be provided for lifting the structure, hoisting insulators an...
- 5.2 Material delivery
- 5.3 Constructability of structures [Go to Page]
- a) Each member should be clearly and permanently marked by stamping or welding. This mark should ... [Go to Page]
- 1) General location of the member in the structure by using a logical numbering sequence
- 2) Structure type
- 3) Special material types
- b) The structure should be designed with a minimal assortment of bolt diameters and types.
- c) Adequate clearance around nuts and bolt heads for wrenches or sockets should be provided.
- d) For safety and ease of erection, a place for a worker to stand should be provided below each l...
- e) The bill of materials should provide an approximate finished (that is, galvanized or painted) ...
- f) Legible erection drawings and data sheets for line sections should be provided. The drawings s...
- g) Fabrication tolerances that are either too restrictive or too liberal can result in increased ...
- h) Consideration should be given to the method of locking fasteners. The method selected will inf...
- i) Designs should be checked for worker accessibility. Design of structures sometimes results in ...
- 5.3.1 Constructability of lattice structures [Go to Page]
- a) Where members are connected by one bolt at each end, the detailer should require a spud hole a...
- b) Depending on the method of erection, the location of leg and crossarm splices can affect the a...
- Figure 2— Splice location recom�mended for aerial erection [Go to Page]
- c) When tilting up structure sections diagonal braces extending below the main legs can be damage...
- Figure 5— Leg splice detail recommended for helicopter erection
- Figure 6— Leg splice detail recommended for crane erection [Go to Page]
- d) When butt splices are used on main structure legs, gin pole or crane assembly may be facilitat...
- Figure 7— Recommended butt splice detail [Go to Page]
- e) When using lap splices, assembly and erection with crane and helicopter techniques are facilit...
- Figure 8— Leg spice recommended for helicopter or crane erection [Go to Page]
- f) When helicopter erection is used, temporary stops are installed in both butt and lap splices. ...
- g) Design internal structure leg bracing to facilitate its assembly and erection with each main s...
- Figure 9— Internal leg bracing detail [Go to Page]
- h) In order to facilitate raising and lowering tools and equipment with handlines, it may be unsu...
- 5.3.2 Constructability of tubular steel structures [Go to Page]
- a) Avoid structural detailing requiring workers to insert tools or their hands between large memb...
- b) Provisions for lifting eyes or pick points to minimize damage to the finish of the pole. Posit...
- c) Provisions for the constructor to verify the lap joint distances and orientation as shown on t...
- d) Provisions for climbing devices, working and belting-off may be desirable for construction and...
- e) Buoyancy of direct embedded steel poles should be considered. Details such as provisions for f...
- 5.4 Trial assembly [Go to Page]
- Figure 10— Trial assembly of complex tubular structure
- 6. Material delivery [Go to Page]
- 6.1 Introduction
- 6.2 Material yard
- 6.3 Receipt and inspection of material
- 6.4 Handling and storage of materials
- 6.5 Overages, shortages, and replacement material
- 6.6 Surplus material
- 7. Assembly and erection of lattice structures [Go to Page]
- 7.1 Introduction
- 7.2 Foundation tolerances
- 7.3 Field assembly
- 7.4 General method of erection
- 7.5 Crane erection
- 7.6 Gin pole erection
- 7.7 Helicopter erection
- 8. Assembly and erection of tubular steel structures [Go to Page]
- 8.1 Introduction
- 8.2 Handling and transportation of poles, arms, and component parts
- 8.3 Single pole structures
- 8.4 Framed structures
- 8.5 Attaching pole structures to various foundations
- 8.6 Helicopter methods (refer to Clause 9)
- 8.7 Post-erection
- 9. Helicopter methods of construction [Go to Page]
- 9.1 Introduction
- 9.2 Economic considerations
- 9.3 Helicopter structure placement
- 10. Assembly and installation of insulators and hardware [Go to Page]
- 10.1 Introduction
- 10.2 Assembly of insulators and hardware
- 10.3 Installation of cotter keys
- 10.4 Installation of assemblies
- 11. Quality assurance
- Annex A—Bibliography [Go to Page]