As far as I can see, there is no hassle to fly out because there is no hole for the birds to fly into the the nesting room. You use the stair area for roving ?

i think u should put the entry hole on the other side since yor staircase is there . the ground floor is gonna be open space for car park ?

I'm not sifu but I can only say the birds won't like your BH.

The 8' roving is narrow,
The entrance hole to nesting room placement. ( it only designed to accommodate your convenient but not to the birds)
The stair case obstructing flying path for 1st floor.
1st floor entrance door at the center ? What is the width of your BH ?

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Added on April 19, 2010, 11:17 amAs a rule of thumb, think a min of 4mx4m for a comfortable fly path when you design your BH.

30'w should be ok to place entrance at the center if the length can increase to 10'.

To suit your staircase cum roving room cum control room design, use metal zigzag staircase instead of concrete one for space saving and less obstructive to the birds. But where is your control room ?

You can actually extend addition 15' x10' floor in the 1st floor to the roving area so that you have a 15'W x 10'L conceal control room at ground floor and install a metal staircase at the side wall to go up to 2nd floor. Your birds can now fly without obstructions.

From what I heard and get and how true they are, I realy don't know as I am just giving some information that I get lah to share with you all.

1.Formally, per Kilo @ Rm100 and now, Rm100 irrespectively of the amount and that's I think is reasonable and I presume that tourists are not be pull up for taking some nests out for gift or personal usage.

2. Export done thru Jabatn Veterinar and not Jabatn Perhilitan.

3. Other not nice things better not discuss here.

Kindly correct me if I am wrong.

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Added on April 19, 2010, 2:23 pm
I am just going to discuss your BH just this one time only since I am the one that suggest to you that design for your agriculture land. I will try to explain the logic behind it.

1.Using the stairway to be the roving area has the advantage as it really save alot of space and you have the large area for you birds to play more than 30 feets high.
2. You need to widen the area ( roving area as they called it) to a larger space taking consideration that your stair take up some space. Consideration must be given to the swiflet ability to circle in the stairway used.
3. This design is most suitable for agriculture land as it protect your BH from being burglary as each floor become a individual BH and the thieves need to break into each floor to be able to steal your nests.
4. I have successfully using the special designed  doors as entrance holes and it is so convenience cos in future when you have alot of birds and nests, you may want to close the door leaving small gaps in the metal doors to allow the birds in but keeping the thieves out.  Initially, all doors need to be open as you wish to allow the birds free flow into your nesting area and you whole building now is a nesting which does not require a roving area in the BH.
5. Why use the door as the entrance to your nesting are is because no one told you that you need special opening for entrance as the more opening to your nesting area is bad for securities.
6. As I often said, using a airwell type, consideration must be given to a easy movement for the birds. Just imagine a 747 plane coming for landing and your runaway must be long enough or big enough for it to fly away incase it get frighten or scared. When your BH become successful, you not longer need this as your birds now can do a helicopter style to fly into the BH just like pouring water. 
6. In all new BH, I  rather prefer a larger entrance opening but due to the followings for BHs @ agriculture land, you need to consider

a) Burglary.
b) Wind
c) sunlight
d) Predators

Above, are my comments for my friend, Mr. Yeo and wish him the luck.

Jo Yeo,
Why dun you share what you are doing differently.
Most folks here like to tinker with new toys and methods.
At least it provides us momentary distraction frm all the worrisome events lately.

brother jo,

any design which has the internals right, birds will like and stay. some even have bird houses made out of the 20' / 40' containers.

so long as the bird can enter to the nesting area, then they can judge the internal conditions and if more interesting and comfortable than previous encounters, then you are king...

have fun and good luck!

Looking at your plan, you may put a high entrance hole for each floor if you think that you can't secure the door well against the human/birds. predators.

Again, as always, a suggestion only......

10' width roving not to say you can't but very minimum. Is either you want to give the birds more comfortable flying path or you sayang the nesting space. But no point having more nesting space over less birds manage to fly in right ?
An option for you is to widen the top foyer to 20' x 30', so that you can walk inside (on top of 2nd floor) the foyer for external tweeter maintenance work and you get HUGE roving area.
You can increase roving at 2nd floor slightly to 12' and the 1st floor roving at 9'. With that, you have a 3' walk way to enter 2nd floor from 1st floor via a wall-sided staircase.

With 30' width and spacious internal roving area, you can have single nesting room's hole right in the center.
Remember to open a spare open roof hole for future 1gp compliance issue.

Are you sure and I was told that it is used extensively in Singapore? If so, then, they must have solve all problems associating to the materials....Blind me!!! or I misquoted someone? What about silica bricks, any idea?

It was mentioned at the Seremban workshop and whether if there are any changes after that, I really don't know.

But Jo Yeo, you have no problem as yours is infact a open roof type compliance with the requirement. You just need to remove some part of the top concrete roof at your entrance hole and you have a open roof type.

Just look at what I scribbled on your piece of paper and the entrance hole look different, right? Anyway, yours is OK and if you are wanting to make it 1GP compliance, allow the first few part of the roofs be removable and that way, you can adjust the airwell opening to compensate for any shortcomings. Remember that there should be a drainage at the lower floor for rain water to flow out of your BH.