Whilst doing some [research into suicides](https://scifi.stackexchange.com/a/178629/58193) in the series I've come across the following quotes from people on reddit that claim the Wall has suicide nets.

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> The Night's Watch has a long history of suicides, they even had "suicide nets" on the Wall at one point to stop people from jumping to their death  
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> [(Spoilers All) Have there been any suicides in ASOIAF?](https://www.reddit.com/r/asoiaf/comments/2s8ant/spoilers_all_have_there_been_any_suicides_in/)
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> I seem to recall that the 581st Lord Commander had installed "suicide nets" on both sides of the wall, for the whole length of it. It is speculated that as the NW's manpower dwindled (some centuries before the books' events) the nets fell into disrepair because of a reduced builders' corps.  
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>  I could be mistaken though...  
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> [(Spoilers All) Suicide in the Nights Watch?](https://www.reddit.com/r/asoiaf/comments/29r7q1/spoilers_all_suicide_in_the_nights_watch/)
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I believe the above quotes have come from the books (/r/asoiaf sub reddit) so answers from the books are preferred but in the case of lack of information show answers are fine.

I've had a look around but I can't seem to find any references for this. Does anyone know if the Wall has suicide nets?