Precast and PreStressed Concrete Lintels
- Thread starter self builder 123
- Start date
The "stressing" is purely because of the camber of the lintel or beam.
A flat lintel is not under any stress at all, and neither is a bit of metal that is set in concrete in a curve shape - which is not the way these things are made anyway!
Why do you suppose they are called prestressed concrete lintels, Woody?
My understanding of them is that the steel is stretched to put into tension before the concrete is set, and the ends cut off later which then try and return and put stress on the concrete. I only lay them, not make them though.
Prestressed lintels are likely to display a camber as an inherent property of prestressed elements limited to L/250.
Taken from Naylor site tech info..
Prestressed lintels are likely to display a camber as an inherent property of prestressed elements limited to L/250.
Taken from Naylor site tech info..
Last edited:
OP... Don't worry too much about the resident rottweiller, who sadly ruins many threads with this sort of childish bickering. Just part of the scenery around here, sadly.
Because they are not post-stressed?
Because pre-compressed does not sound as catchy?
IIRC, you'll find that's not a valid excuse under many laws.
With a lintel the steel is tensioned before the concrete is placed and only released when the concrete is strong enough to grip it.
The concrete then experiences compressive stresses to balance the tension in the steel.
Put the lintel into bending and the bottom face normally goes into tension, which of course concrete doesn't like, but because it's already compressed the NET result is still compression which concrete is happy with. (Unless of course the lintel is overlaoded in which case all bets are off)
They are made in long lengths and cut to suit
Post stressed concrete is common on larger scale works but just to confuse it's usally referred to as POST TENSIONED
I use the law of the Olde Wilde West.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
