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How strong are our windshields?

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Old 04-21-2007, 11:24 PM
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Chad68
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Default How strong are our windshields?

I was doing about 85 overtaking a big rig on the freeway. Since it was towing the worlds biggest, dirtiest bulldozer on the flatbed trailer, I thought about just falling in waaay behind it since my exit was coming up and not risk the chance of rocks but went around him anyway.

Bad idea.

I could not believe how hard the windsheild must have been hit judging by the sound. I would have thought the thing would have shattered. When I went to look, I fully excpected to see at least one or two huge cracks and or chips. Barely anything noticable at all.

However my hood near the windsheild wasn't so lucky. It has a 3/4" scratch that is GOUGED all the way to the metal, like it was scribed in with a scratch awl as hard as somebody could press, without warping the metal

Last time I had a scratch that bugged me, I spent about $800 dressing up the engine bay

I'm working on filling in the scratch and it will look better but has anybody had their windsheild shatter into millions of pieces, if so what caused it.

This rock had to have had more impact energy than a 600 FPS .177 pelet gun.
Old 04-21-2007, 11:31 PM
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JunkStory
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wow you are lucky. I think your hood absorbed most of the energy. Otherwise I think your windshield would crack.

4 yeras ago a small rock hit my maxima and left a small crater in my windshield. Its still there but the windshield is OK.
Old 04-21-2007, 11:36 PM
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Mike Wazowski
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Originally Posted by Chad68
has anybody had their windsheild shatter into millions of pieces, if so what caused it.
windshields are laminated glass. There for they do not break into millions of pieces.

Tempered glass is a type of safety glass that has increased strength and will usually shatter in small, square pieces when broken. side windows and rear window are tempered
Old 04-21-2007, 11:40 PM
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I1DER
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Without a doubt, the hood deflected the rock. The angle at which the rock hits makes all the difference in the world.
Old 04-22-2007, 12:06 AM
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Armitage
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My windshield is a piece of crap. I literally have thousands of specs I can see when the sun hits it at certain angles. And they don't come out when washed.
Old 04-22-2007, 01:34 AM
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black06z
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Originally Posted by USN HM 350Z
windshields are laminated glass. There for they do not break into millions of pieces.

Tempered glass is a type of safety glass that has increased strength and will usually shatter in small, square pieces when broken. side windows and rear window are tempered
true.........
Old 04-22-2007, 01:39 AM
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CaliTouring
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Front windshields dont shatter. its actually 2 peices. i beileve and quote me if im wrong but its a layer of glass a sort of saftey film in the middle then another peice of glass. sorry i dont know the right termanology.
Old 04-22-2007, 08:10 AM
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Mike Wazowski
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Originally Posted by CaliTouring
Front windshields dont shatter. its actually 2 peices. i beileve and quote me if im wrong but its a layer of glass a sort of saftey film in the middle then another peice of glass. sorry i dont know the right termanology.
Originally Posted by USN HM 350Z
windshields are laminated glass. There for they do not break into millions of pieces.

Tempered glass is a type of safety glass that has increased strength and will usually shatter in small, square pieces when broken. side windows and rear window are tempered
.
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