L-shaped crossarm, related system, and method of assembly
The present disclosure relates to a mounting base for a crossarm and the crossarm. The mounting base may include a front-facing fastening surface, a rear-facing surface, and an opening formed between the front-facing fastening surface and the rear-facing surface, where the opening comprises a generally reverse L-Shaped geometry that extends through an entire width of the mounting base. The crossarm may include a first section and a second section that are oriented perpendicularly to each other, where the first section and second section are composed of composite material that contains a plurality of fibers within the composite material.
1. A crossarm for power transmission systems, the crossarm comprising:
an arm extending in a longitudinal direction and having a generally uniform cross-section formed of a first section and a second section, wherein the first section and the second section are coupled together and are oriented perpendicularly to each other, wherein at least one of the first or second section has a reinforcement tab extending from a distal end along an interior edge toward the other of the first or second section to improve resistance to torsion or bending of the arm,
at least one mounting hole formed on one of the first and second sections for mounting the arm to a utility structure; and
a plurality of power line attachment apertures formed arm along the other of the first or second sections than the mounting hole for securing a power line or an insulator to the arm,
wherein the arm is composed of a composite material that contains a plurality of fibers extending in the longitudinal direction within the composite material.
2. The crossarm of claim 1 , wherein the plurality of fibers extend along an entire length in the longitudinal direction of the arm.
3. The crossarm of claim 1 , wherein the plurality of fibers do not extend along an entire length in the longitudinal direction of the arm.
4. The crossarm of claim 1 , wherein at least a portion of the arm is formed as a sandwich structure having the composite material and a second material.
5. The crossarm of claim 4 , wherein the sandwich structure has alternating layers of the composite material and the second material being lighter weight than the composite material.
6. The crossarm of claim 4 , wherein the second material comprises structural foam or honeycomb material.
7. The crossarm of claim 1 , further comprising a reinforcement rib extending from one of the first or second sections, wherein the reinforcement rib improves resistance to torsion or bending of the arm.
8. The crossarm of claim 1 , wherein the first section and second section are formed separately and are connected together to form the arm.
9. The crossarm of claim 1 , wherein the first section and second section are coupled in at least one of a generally L-shaped geometry, I-beam shaped geometry, or a T-beam shaped geometry.
10. The crossarm of claim 1 , further comprising a second reinforcement tab extending from a distal end of the other of the first or second section, the second reinforcement tab extending toward the first reinforcement tab.
11. The crossarm of claim 1 , further comprising:
a mat material covering the plurality of fibers along an exterior edge of the first and second sections; and
an outer coating covering the mat material.
12. A crossarm for power transmission systems, the crossarm comprising:
an arm extending in a longitudinal direction and having a generally uniform cross-section formed of a first section and a second section extending generally perpendicularly to the first section, wherein at least one of the first or second section has a reinforcement portion extending from a distal end to improve resistance to torsion or bending of the arm;
wherein the arm is formed of a composite material having a plurality of fibers extending in the longitudinal direction.
13. The crossarm of claim 12 , further comprising:
at least one mounting hole formed on one of the first and second sections for mounting the arm to a utility structure; and
a plurality of power line attachment apertures formed arm along the other of the first or second sections than the mounting hole for securing a power line or an insulator to the crossarm.
14. The crossarm of claim 13 , further comprising a plurality of power line attachment assemblies coupled to the arm adapted to secure one of a power line or an insulator to the crossarm.
15. The crossarm of claim 12 , further comprising a second reinforcement portion extending from the other of the first and second section.
16. The crossarm of claim 12 , wherein the reinforcement portion extends from a distal end of the first or second section along an interior edge towards the other of the first or second section.
17. The crossarm of claim 12 , further comprising:
a mat material covering the plurality of fibers along an exterior edge of the first and second sections; and
an outer coating covering the mat material.
18. A crossarm for power transmission systems, the crossarm comprising:
an arm extending in a longitudinal direction and formed of a composite material having a plurality of fibers extending in the longitudinal direction within the composite material, the arm having a generally uniform cross-section formed of:
an upper section for securing a power line or an insulator to the arm; and
a lower section extending transverse to the upper section for mounting the arm to a utility structure;
wherein at least one of the upper or lower section has a reinforcement tab extending from a distal end to improve resistance to torsion or bending of the arm.
19. The crossarm of claim 18 , wherein the reinforcement tab extends from the distal end of the upper or lower section along an interior edge towards the other of the upper or lower section.
20. The crossarm of claim 18 , further comprising a second reinforcement tab extending from the other of the upper or lower section.