what method can we use to deter owl from attacking the swiftlet. Some said, shoot to kill. any better solution than killing the owl?

I was thinking something like this.
With castors, it shd be around 7', the scaffolding is 6'.
There are half scaffolds of 3', so you can mix and match and build up as needed for yr BH dimension & design.
You can also add on a pulley sustem where you just pull yrself along w/o having to climb down to push the gurney.
If you want some more fun, you can fabricate a manual winch or motorised winch to pull you along.
You will have to figure out if this is feasible.
I figure there will be a need to have guides on the floor to guide it along.
Also you can hook yrself with a safety harness onto the gurney if you can build it sturdy or have a cable at on the ceiling where you can hook yr safety harness.
Since it's modular you can dismantle for storage at a convenient corner of each floor.
Just initial thoughts for now, maybe you guys can think of better ways with this.
The crossbars I suggest you fabricate yr own as the commercial ones are flimsy. a 2"x3" ('kok-chai')/wood is a good replacement.
Please use at yr own risk & I take no responsibility for yr safety from yr own fabrication.

PS cant load my pic as there's a storage problem on the LowYat site.
Will try upload tomorrow.

PS2 The storgae problem still exist, so you will need to download here
http://i283.photobucket.com/albums/kk287/s...ng_gurney_1.jpg

swiftlailai,
thks for yr comments.
I may adopt a dog kennel yet.
I will stay with 15' if the contractor doesnt make a fuss or the additional cost is marginal.
I will hv the option of a mezzanine floor plus condo-type NP, (2 possible expansion methods) all w/o having to mess with the BH structure.

if i reduce the hole to 5x5ft is ok?? will it too small for the bird to enter the hole??

then i will follow ur opinion have 3 holes there~..thanks ya..

dude how about the LAL? 10x10ft should be ok for the bird to fly down to the lower floor right?

There is a Chinese saying: your money is in the bank, but you are in the Heaven. My friend, try your best to avoid having LAL between floors. There are far too many mishaps and accidents from this type of design which led to many permanently maimed or disabled with fatal cases caused to the owners and consultants for the past years. Almost every year, we hear such misfortunes. Most of them are filthy rich. Such type of design is a booby-trap to the owners. So, do be careful and to reconsider.