Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Emergency Opening from a concrete tunnel

[Subject Prev][Subject Next][Thread Prev][Thread Next]
        Your dimensions sound reasonable.  But why don't you get a copy of the applicable code from OSHA, MSHA?etc. and check out the dimensions they specify for ladder cages?  They are probably very specific; AND they almost certainly differ from state to state.
H. Daryl Richardson


----- Original Message -----
Sent: Monday, March 17, 2008 10:29 AM
Subject: Emergency Opening from a concrete tunnel

Dear list:


I got this scenario; an underground tunnel equipped with an emergency exit using a ladder (18? w x 13?-6? high) to climb-up towards the ground surface level. My question is, How wide is the concrete opening I need to provide conforming it to the code (OSHA, MSHA?etc)?


I plan in using a 3? x 2?-6? opening.





Engr. Julius Micayas

P.E. license no.32969

Project Manager/Sr lead Structural Engineer

River Consulting LLC

111 Veterans Memorial Boulevard

               Suite 1600

Metairie, Louisiana 70005

Phone - 504-841-3014 (direct)

504 837-5275 (office)

Fax - 504-837-2986

E-mail: jmicayas(--nospam--at)