socesey 10, 19 a FRANKI
: CANADA LIMITED

$UZAN C.8. WONG ARCHITECT : PAD. 5

3437 Valley Drive

vancouver, B.C. V6L 2K3

Attention: Suzan Wong

Dear Suzant

Subjects Marpole Court Pile Foundations
Our Raf: DHal94CA0110

Further to our conversation and your request we offer the following
letter to aceiet your dacisivn on pile type.

The Cook Pickering and Reyle Td. ceport af June 3, 1993 identifies
the founding depth and types of various piles.

H- piles becausa of their shape are classified uy low diaplacament
piles and therefore would exhibit the least inotallation rasistance
of those deseribed. Their penetration however would be greatest.

vibrations and noise from pile driving are related to the energy
used to install the piles.

Possible colutiono to reduce vibrations and noige arc!

t. Reduce the load par pile and therefore caduce driving
energy during installation.

2. redcill through dense luyera if possible.

3. Use vibeo hanuser to insutal! H-piles.

Larger displacement pile types such au pipe piles and expanded base
piles may result in vibrations that exceed your requirements.

We hope this Letter provides you with some ineight into wetheds the
contractor would utilize to minimtee vibratieus when driving piles
in close proximity to axtsting buildings.

Should you have any tucther questions please do not haxnilate to
contact mycelf.

yours vory truly,

FRANKE CANADA LIMITED

PAG
perek ¢. Harris, P.Eng.

Manager Pacific Diviston F3

frank! 2252 Rivar Way ARO - int (04) 946-1161

, Oy 248.4182