After thinking about it, I think I figured it out:

The bridge couldn't hold a single ounce over 10 tons. The bird was more than a single ounce.

Don't worry, this is the first time I've ever heard this riddle.

Nope, I mean that it can't holding more than an ounce literally.

Xidash

I know this one for once. I won't spoil it.

Thanks Did I tell it to you?

Xidash

I think I know it: The truck was already across the bridge when the bird landed?

Nope.

Xidash

Um, there were safety cables and the bird's weight becomes negligible?

Off-Topic: Hey! Why is my old name spelled with an "i" with the "y" in front of the "r"? It's "Twilight Helryx, people! If you can spell "Helryx" without a problem this shouldn't be too hard, IMO. XP But thanks for including me in your banner!

Hiyas I know the answer.

*spoils*

E: if anyone wants the answer fast I can PM you

Wait, I think I have a better answer:

The bird landed at the bridge entrance/exit post (which are part of the bridge), And since the first posts are nailed to the ground, the bird's weight isn't actually going to the bridge.

Um, there were safety cables and the bird's weight becomes negligible?

 

Off-Topic: Hey! Why is my old name spelled with an "i" with the "y" in front of the "r"? It's "Twilight Helryx, people! If you can spell "Helryx" without a problem this shouldn't be too hard, IMO. XP But thanks for including me in your banner!

Nope.

Whoops :3

Wait, I think I have a better answer:

 

The bird landed at the bridge entrance/exit post (which are part of the bridge), And since the first posts are nailed to the ground, the bird's weight isn't actually going to the bridge.

Nope.

Xidash

Is it a trained V.F.D. bird?

TELL ME WHAT IS A VFD??

And no.

Xidash

Better guess:

The truck was only halfway onto the bridge, so it didn't have to support all the weight.

So the bird was able to land on it without the bridge collapsing.

Am I right?

P.S. Shadix, V.F.D. is- *gagging sounds*

Nope.

Xidash

Hmmmm.

Is it because the bridge cannot hold a single object thats over 10 tons?

Is it cause the bird didnt land on the top of the Bridge, but on one of its legs?

Did the bird land after that truck left the bridge?

If niether of these.

Where'd the bird land?

What type of bridge was it?

--

Lord Oblivion

Nope.

Nope.

Nope.

On the bridge.

A weird one for sure

Xidash

Did the truck not weigh ten tons?

Is it because the bird flew off when it saw the truck coming, thus making the weight back to 10 tons?

Did the truck drive off of the bridge?

If not

Was it a smart bird?

How far away was the bird from the truck?

--

Lord Oblivion

No, it weighed 10 tons. I said so.

Nope. They were on at the same time.

Nope.

Just a normal bird.

Irrelevant.

Xidash

Wow this is actually tougher then the last one I never knew how delicate a bridge could be xD

Did the truck run over the bird?

Did the bridge already collapse? xD

Was the bridge still being built (as in cables n stuff?)

Is this really a bridge or is it a bridge as in a different definition for the word?

If none of these, we need a hint lol

--

Lord Oblivion

Wow this is actually tougher then the last one I never knew how delicate a bridge could be xD

 

Did the truck run over the bird?

Did the bridge already collapse? xD

Was the bridge still being built (as in cables n stuff?)

Is this really a bridge or is it a bridge as in a different definition for the word?

 

If none of these, we need a hint lol

--

Lord Oblivion

To elaborate on this (sort of), was the bridge on the ground or was it being suspended in the air? (That's not the right term, but I'll assume you know what I mean and won't take advantage of the inaccurate wording .)

~ BioGaia

well hi there guys

it just so happens that i know the answer

hahaha

@Lord O:

No.

No.

No.

It's a real normal(ish; how many bridges hold only 10 tons?) bridge.

@BioGaia:

Not really important.

It's a real normal(ish; how many bridges hold only 10 tons?) bridge.

Well the average camaro (randomly picked car) weighs almost 1 and a 1/2 tons. So if there was 8 of them or cars of same weight on a ten mile bridge (which is highly possible) those bridges would collapse xD Normally I'd expect a 10 mile bridge to hol like 1000 tons or something *random estimating*

Anyways.

Did the truck stop before it could actually make the bridge collapse?

What is this bridge made of?

By freight truck do you mean as in a freight train or just a truck (that goes honk honk vroom vroom )

Did the bird land on the truck?

Did the truck lose some cargo?

--

Lord Oblivion

No, that wouldn't help.

Irrelevant.

An actual truck, not a train.

How would a bird land on a speeding truck? No it didn't.

No.

Xidash

Changing my guess to avoid double post

I guess the bird was part of the truck's cargo, thus somehow it fell out of the truck, thus landing on the bridge. Seeing as it was part of the truck's weight nothing changed

--

Lord Oblivion