When did UBC first require 1-hour dwelling separation walls?

[Yikes]

My cliet has a very old apartment building. Their funder wants to know that it complied with code at time of construction, since there is no proof that the gyp board (probably button board) had a fire-rating.

So, my question is: what UBC code edition first required dwelling unit separation (demising) walls to have a fire rating?

 

[cda]

So what year was it built?

How many stories

 

[cda]

And what kind of dwelling?

Apartment or other

 

[cda]

1970 UBC



For H::



For I::

 

[RLGA]

The oldest UBC I have is 1955 and it has the same requirements as indicated above in the 1970 UBC. In 1982 they eliminated the exception, and then in 1988 they introduced the separation requirements that are very similar to today's IBC separation requirements.

 

[my250r11]

This is a good one for the code collector Glenn!!

 

[Glenn]

The oldest UBC I have is 1955 and it has the same requirements as indicated above in the 1970 UBC. In 1982 they eliminated the exception, and then in 1988 they introduced the separation requirements that are very similar to today's IBC separation requirements.

Weird. My 1955 does not look like 1970, nor does any edition between the two. (for Group H). From my collection, 1970 was the first time this exception appeared. Here are some tidbits:

1946, H, division 1 (child care) had to be one-hour throughout, with no regard to size or stories. No comment about division 2.
1949 H, division 2 (hotels, apartments) had to be one-hour throughout but only if more than one story
1952, H, divisions go away and child care is no longer identified as H. One hour only if more than 2-story or 2 story with a limit to second floor area.

It stayed this way, generally, until 1970.

 

[MtnArch]

In case anyone is interested .. UC Berkeley's library has digitized the UBC from 1927 up to 1994: https://digitalassets.lib.berkeley.edu/ubc/

 

[RLGA]

Weird. My 1955 does not look like 1970, nor does any edition between the two. (for Group H). From my collection, 1970 was the first time this exception appeared. Here are some tidbits:

1946, H, division 1 (child care) had to be one-hour throughout, with no regard to size or stories. No comment about division 2.
1949 H, division 2 (hotels, apartments) had to be one-hour throughout but only if more than one story
1952, H, divisions go away and child care is no longer identified as H. One hour only if more than 2-story or 2 story with a limit to second floor area.

It stayed this way, generally, until 1970.

Actually, the 1955 edition has the same requirement, just not the same exception (there is no exception in the 1955 edition). My 1964 edition also does not have the exception. I don't have a copy of the 1967 edition, so I assume the exception was added in that edition or the 1970 edition (margin marks were not used until the 1973 edition, so I can't tell specifically when the exception was added).

 

[Yikes]

Thanks for the responses. The existing development was first constructed in the early 1950s, however, no formal building dept records (C of O, inspection cards) exist from that era. There are 232 dwelling units in 29 separate one-story buildings, 8 units per building. They are all a mix of studio- and two-bedroom apartments. According to old-timers, it may have originally been military housing on federally owned land that later came under local jurisdiction, hence the lack of city records.

 

[cda]

Since they are still standing,

Tell said Funder, they comply with Hammurabi code.

Do they have to come up to current earthquake requirements??

Any permits over last 20 years?? No burn outs??

 

[Yikes]

Update: thanks to the links to the Berkeley code library, I was able to satisfy the funder!