Not all front doors are the same size.
If the height of the sofa is 37 and the depth 35.4 then drawn as a triangle the distance from the centre of the hypotenuse, (the longest side of a right angled triangle), to where the 2 sides join at the 90 degree angle needs to be shorter than the width of your door. (Sorry not the best at maths but sure someone here can work it out). The length of the sofa is immaterial because you don't need to fit it through on it's end.
