Como Tester101 mencionou, nesta aplicação há quase nenhuma carga na viga de aro, uma vez que suas vigas reais são suportadas pelo feixe. Pregar pela viga da jante no final das outras vigas ficará bem. Eu construí muitos decks como este.
Aqui 'é um estudo que foi feito para finalizar, e as recomendações relevantes :
Recommendations
Nails driven into the end grain of wood do resist both static and impact loads. However, additional research is required in several areas. Of the 4,723 data points on the relationship of specific gravity to nail withdrawal strength, only 294 data points were from tests of nails with a diameter larger than 2.52 mm (0.099 in.). Therefore, research is needed on endgrain withdrawal capacity of nails with a diameter greater than 4.1 mm (0.163 mm) so that Equation (5) can be further developed.
Furthermore, none of the studies evaluated repetitive loading of nails from the end grain since joints in service typically do not experience strictly static or impact loading. Repetitive loading may cause end-grain withdrawal capacity to significantly decrease over time.
There is conflicting data on how threaded nails perform in comparison with smooth shank nails when withdrawn from the end grain. Three studies showed an increase in nail withdrawal capacity whereas one study showed a decrease. Since the use of threaded fasteners in construction is increasing, more research is needed to determine the effects of surface characteristics on end-grain withdrawal.
Finally, more research is needed to determine the long-term withdrawal strength of nails driven into end and side grain. The data in this report suggest that over time end-grain and side-grain withdrawal capacity may become equivalent. Very few test replicates measuring the effect of time delay on withdrawal strength were conducted, and more tests need to be run to clarify these limited observations.
Se você ainda acha que precisa de mais suporte, sim, pode encontrar algo assim: 
na maioria das lojas de hardware. Se você estiver trabalhando com madeira tratada com pressão, lembre-se de que precisará de placas e conectores galvanizados.
