There are these variations, but most are designed to take the forces offered at an angle.
The following from another blog site ...
WE have storm straps - and have on occasions used them -- our normal method
-- as in the pictures supplied with it is to peg it out some 5 foot either side of the main side poles,
and then put the large webbing strap over the roof of the Awning.
The ends of the straps are attached via springs to the massive 12" 'V' pegs. and pulled tight.
This does work and keeps the awning stable.. there are one or two distractions from this
-- the noise of the strap beating on the roof -- this was accidentally cured by leaving a twist in the strap as it passed over the roof.
-- The possible wear if left on for a period of time at the pressure points as the strap goes over the roof poles -- this was alleviated by getting some plumbers pipe lagging and putting it under the pressure points.
We have been on a site where our friend and neighbour put the straps on inside the awning over the frame, and in a vicious storm in the night the awning simply ballooned up and ripped away from the frame
-- the frame stayed put held by the storm strap
-- and the frame pegs
-- the pegs holding the bottom canvas just 'popped'
Not a lot we could all do to help at 2 am in the per-sistering wind and rain..
With our new small awning it has yellow storm straps built in to the canvas and these are on the outside but it recommends larger pegs and to be pegged in minimum of 4 foot away from the main side pole.. we have never had any problem with this and we have been in a force *** gale
You can see ours rigged :
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