SHOWA KIKAI SHOJI CO.,LTD.

Bridge-fall prevention system KANSHO-CHAIN

Shape and type

  • ・High-strength shackles and adjustment shackles / brackets and connections with individual parts
  • ・High-strength chain / secures full length and margin length
  • ・Shockless chain / chain with shock-absorbing function

Type of shock KANSHO-CHAIN [Unit: mm]

Type d1 RD RL t・t 4 d2 Standard
length
CL
1 link
Additional
length P2
Standard
of Links
n
Allowable
load in the event
of an earthquake
Allowable
elongation
during an earthquake
Total
Mass (3links)
Type 1 19 100 684 24 22 1517 120 3 225kN 195 21.8kg
Type 2 25 125 1024 34 28 2132 150 3 375kN 220 55.4kg
Type 3 30 150 718 40 32 2000 170 3 510kN 120 75.6kg
Type 4 32 160 782 44 38 2244 205 3 615kN 140 106.9kg
Type 5 38 190 904 50 42 2553 225 3 825kN 160 153.7kg
Type 6 42 210 1002 55 50 2888 270 3 975kN 170 215.0kg
Type 8 50 250 1182 60 55 3280 295 3 1200kN 205 321.1kg
Type 9 52 250 1182 65 60 3420 320 3 1350kN 205 373.0kg
Type 10 60 300 1420 75 60 3875 320 3 1545kN 245 596.0kg
  • (1) The standard links of the high-strength chain are n = 3.
  • (2) P2 indicates the length when a high-strength chain is increased or decreased by one link.

Quality:

Rubber Material 

Vulcanization product obtained by mixing natural rubber and synthetic rubber

Standards for steel 

Shockless Chain

  • ・Main material: SCM420H (JIS G 4052)
  • ・Heat treatment / Quenching / Tempering

Strong Chain

  • ・Main parts: SCM420H (JIS G 4052), SCM430 (JIS G 4053)... Type 3 only
  • ・Heat treatment / Quenching / Tempering

Strong shackle and adjustment shackle

  • ・Main parts: SCM435H(JIS G 4052), SCM435(JIS G 4053)
  • ・Heat treatment / Quenching / Tempering

Standard for rubber 

Test items Unit Specimen Discipline Notes
Tensile strength MPa Dumbbell-shaped No.3 16.0 or more JIS K 6251
Growth % Dumbbell-shaped No.3 350 or more JIS K 6251
hardness degree
72 or less JIS K 6253

Surface treatment of steel materials

All parts are hot-dipped galvanized HDZ 55 (JIS H 8641) to ensure durability.

High durability specification chain
(for use in salt damage areas)

For use in areas with severe environmental conditions, we offer high corrosion-resistant chain and shackle specifications treated with aluminum-magnesium spraying.
Products have remained rust free for more than 5000 hours in salt spray tests conforming to JIS Z 2371.