Fabricated lattice members and connection sets to utility tower drawings
We fabricate lattice transmission-tower steel to the released utility drawings, supplying identified leg members, bracing, crossarms and connection parts. Tower type, line position and leg elevations define the component schedule. Our offer groups the steelwork and specified fasteners by tower reference so site receiving can reconcile each assembly with its drawing revision.
| Assembly basis | Released utility tower and member drawings |
|---|---|
| Structural parts | Leg angles, bracing, crossarms and scheduled connection plates |
| Tower variants | Selected tower-body and leg-extension references |
| Connections | Specified holes, bolt diameters, lengths and hardware |
| Material | Drawing-defined structural steel and required material records |
| Finish | Selected galvanized finish and acceptance requirements |
| Packing | Tower/panel member groups with separately counted fasteners |
ASTM A394-08(2024) covers five nominal bolt diameters for steel transmission towers, substations and similar structures. The metric column converts those inch references.
| A394 nominal diameter (in.) | Converted diameter (mm) | Order selection retained |
|---|---|---|
| 1/2 | 12.700 | Type, length, thread and hardware |
| 5/8 | 15.875 | Type, length, thread and hardware |
| 3/4 | 19.050 | Type, length, thread and hardware |
| 7/8 | 22.225 | Type, length, thread and hardware |
| 1 | 25.400 | Type, length, thread and hardware |
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ASTM A394-08(2024) diameter-scope reference, with inch-to-mm conversion using 25.4. The tower connection drawing selects the actual fastener specification, diameter, length, holes and hardware. Supplied tower-member dimensions and capacities follow the released project design.
ASCE/SEI 10 addresses design, fabrication and testing of latticed transmission structures and their connections. The project identifies its adopted edition, utility requirements and released tower configuration; those documents establish the member and acceptance schedule we fabricate.
The current A394 scope identifies Type 0 hot-dip-zinc-coated carbon-steel bolts, Type 1 hot-dip-zinc-coated quenched-and-tempered bolts and Type 3 weathering-steel bolts. The selected connection specifies its type and finish together with the required hardware.
Legs, bracing, plates and fasteners retain their specified materials. Required records link those selections to the member and hardware references supplied for each tower configuration.
The member list locates each leg and bracing item by its drawing reference. Different leg extensions keep their separate marks, hole patterns and connection orientation, preserving the intended foundation-level arrangement.
The released detail fixes crossarm length, attachment points and the supporting member geometry. Fabrication retains that steelwork interface with the selected tower type and line position.
Bolt holes, edge preparation and mating angles follow the connection detail. Required finish, venting and drainage provisions are coordinated with the fabricated members and selected galvanizing process.
A line package can group repeated body types while separating different crossarm and leg-extension schedules. The takeoff lists actual tower references and their variations, giving each delivered component a defined destination.
An identified tower and member drawing establishes the steel section, holes and finish for replacement pieces. The order retains the existing configuration and required revision so new parts match the accepted assembly.
Checks relate the section, cut ends, hole pattern and orientation to the member drawing. Connection fit uses the specified datums.
A trial or check assembly is included when the order’s acceptance plan requires it. Its scope identifies the tower references, mating members and connection details covered by that check.
Required galvanizing and surface checks retain the member identity. The release list reconciles drawing revisions, material records and finished component quantities.
Our offer lists the tower references, steelwork, finish and included hardware. Separate assembly variations and any additional spares retain their own quantities and commercial basis.
Long angles and fabricated parts travel on supports with protection for connection ends. Bundle groups preserve member identity and the agreed handling arrangement.
Bolts, nuts and washers are grouped by their specified references and quantities. The packing list links those cartons to the tower schedule alongside the marked steel bundles.
A 1/2 in. nominal diameter equals 12.700 mm; M12 identifies a 12 mm metric nominal diameter. The connection drawing retains the selected inch or metric thread, matching nut and hole detail. A change follows the utility’s accepted connection revision.
Each tower type uses its own utility design and attachment geometry. The order retains the actual type and line-position reference, together with the corresponding body, crossarm and member schedule.
Yes. The extension schedule identifies the required configuration at each leg and tower position. We keep those member sets and quantities separate from repeated body and crossarm parts.
The quotation identifies the supplied structural members and fasteners. Electrical hardware, insulators and conductors have their own equipment schedules and are included only as explicitly listed purchase items.
Type 0 covers hot-dip zinc-coated low- or medium-carbon steel bolts. Type 1 covers hot-dip zinc-coated medium-carbon steel bolts that are quenched and tempered. The connection specification retains the required type alongside diameter and length; a substitution follows the utility’s accepted revision.
Yes, as separately counted fastener items. Each spare line retains the required specification, type, diameter, length and matching hardware, keeping it distinct from the assembly’s included connection sets.
Other items in the same product category.
Send the tower types and released member schedule, leg-extension and crossarm references, quantities, finish requirements and destination. We return the defined steelwork and hardware scope with member-based packing and shipment terms.