This is the final tutorial on the series of building you deck. If you have followed the steps that we have outlined carefully and safely you should have no problem putting in a railing that is both attractive and secure. Deck railings are important to both the safety and the aesthetic appearance of your deck. In other words, a railing is the perfect blend of “strength and beauty”. A deck railing must be built to comply with your local code requirements. For instance, a deck rail should be at least 36" tall and should not have any gaps that are greater than 4".