Formwork system comprising: - an upper formwork support , - a lower formwork support which is arranged transversely to the upper formwork support , - a securing device which is in each case connected to the lower formwork support and the upper formwork support , the securing device comprising, for securing the upper formwork support on the lower formwork support : - a first contact portion resting against a first inner surface of an upper flange of the lower formwork support ; - a second contact portion resting against a first lateral surface of the upper flange of the lower formwork support ; - a third contact portion resting against a first inner surface of a lower flange of the upper formwork support ; - a fourth contact portion resting against a second inner surface of the lower flange of the upper formwork support , the fourth contact portion being spaced apart from the third contact portion in a first horizontal direction ; - a fifth contact portion resting against a second lateral surface of the upper flange of the lower formwork support , the fifth contact portion being spaced apart from the second contact portion in a second horizontal direction , characterised by: - a tenth contact portion resting against a first outer surface of a web of the lower formwork support , which web connects the upper flange to the lower flange . - an upper formwork support , - a lower formwork support which is arranged transversely to the upper formwork support , - a securing device which is in each case connected to the lower formwork support and the upper formwork support , the securing device comprising, for securing the upper formwork support on the lower formwork support : - a first contact portion resting against a first inner surface of an upper flange of the lower formwork support ; - a second contact portion resting against a first lateral surface of the upper flange of the lower formwork support ; - a third contact portion resting against a first inner surface of a lower flange of the upper formwork support ; - a fourth contact portion resting against a second inner surface of the lower flange of the upper formwork support , the fourth contact portion being spaced apart from the third contact portion in a first horizontal direction ; - a fifth contact portion resting against a second lateral surface of the upper flange of the lower formwork support , the fifth contact portion being spaced apart from the second contact portion in a second horizontal direction , characterised by: - a tenth contact portion resting against a first outer surface of a web of the lower formwork support , which web connects the upper flange to the lower flange . - a first contact portion resting against a first inner surface of an upper flange of the lower formwork support ; - a second contact portion resting against a first lateral surface of the upper flange of the lower formwork support ; - a third contact portion resting against a first inner surface of a lower flange of the upper formwork support ; - a fourth contact portion resting against a second inner surface of the lower flange of the upper formwork support , the fourth contact portion being spaced apart from the third contact portion in a first horizontal direction ; - a fifth contact portion resting against a second lateral surface of the upper flange of the lower formwork support , the fifth contact portion being spaced apart from the second contact portion in a second horizontal direction , - a tenth contact portion resting against a first outer surface of a web of the lower formwork support , which web connects the upper flange to the lower flange . <EOS>