10-21-2006, 02:40 PM
There are a few photos I have seen were the post has moved on the pier
http://www2.hawaii.edu/~entomol/pdf_files/hsp-3.pdf
and if you scroll bask to the #2 photo in this series there is an old coffee shack on posts that had the hill slip away, and it followed. One of the most interesting for me was the image #341, where the slab foundation actually shifted (no cracks were noted). I have to say that most of the total public documentation on Sundays quake has been contents damage, esp. from heavy items stored up, toppling down, including a garage door that was up, and came flat down on the 2 cars in the garage. It would really pay off in the long run to make sure eveything stored up could not easily topple down, with things like shelf ledges, cabinet doors that latched & taller furniture stapped up. Shelving racks on wheels actually allow a bit of ground motion to roll under them, prior to the shelving unit beginning to move.
One immportant thing to note was te number of tall rock walls & more importantly rock retaining walls that failed. When some of the retaining walls failed, the house adjacent had the potential of being undermined (#203,258, 285, 289). These are post & Pier, but it really doesn't matter, if your supports are set upon material held by a retaining wall & that wall fails, your house could fail. Be very carefull when using retaining walls in this manner.
Aloha, Carey
http://www2.hawaii.edu/~entomol/pdf_files/hsp-3.pdf
and if you scroll bask to the #2 photo in this series there is an old coffee shack on posts that had the hill slip away, and it followed. One of the most interesting for me was the image #341, where the slab foundation actually shifted (no cracks were noted). I have to say that most of the total public documentation on Sundays quake has been contents damage, esp. from heavy items stored up, toppling down, including a garage door that was up, and came flat down on the 2 cars in the garage. It would really pay off in the long run to make sure eveything stored up could not easily topple down, with things like shelf ledges, cabinet doors that latched & taller furniture stapped up. Shelving racks on wheels actually allow a bit of ground motion to roll under them, prior to the shelving unit beginning to move.
One immportant thing to note was te number of tall rock walls & more importantly rock retaining walls that failed. When some of the retaining walls failed, the house adjacent had the potential of being undermined (#203,258, 285, 289). These are post & Pier, but it really doesn't matter, if your supports are set upon material held by a retaining wall & that wall fails, your house could fail. Be very carefull when using retaining walls in this manner.
Aloha, Carey