ASCII Borromean Rings

CJam, 53 51 50 49 bytes

Plain old base conversion...

"FÓîÞ¤ÛY­ËB[¢O²êÍÓ
}²|äG"299b4b"+ -|"f=B/N*

All characters are well in extended ASCII range (ASCII code 1 to 255), so number of characters == number of bytes.

Try it online here and get the original code here

Pyth - 51 bytes

I'm sure someone's gonna beat this quick, but just a base compression answer cuz I'm feeling lazy. I'll try to write a serious answer soon.

s@L"
 +-|"jC" zB²;¶Ê ¿ïÁ»#-ÌClHõy%|ap"5

Try it here online.

s              Reduce on string concatenation
 @L            Map second arg to index first arg
  "..."        String of all chars (Pyth allows literal newlines)
  j            Base conversion to list
   C           Base conversion 256 -> 10
    "..."      Base 256 string
   5           To Base 5

Pyth, 49 bytes

jbc11s@L"+ -|"jC"Tª]UʨWÕÝ_K¨}ÝÝ÷K¨Ý]Òê]UÕ*¡"4

Demonstration.

This uses base 4 encoding, and chops the string into elevenths, then rejoins them on newlines.