Hi,
I am getting this 96" wide west elm couch delivered https://www.westelm.com/products/haven-sofa-84-h3421/?pkey=s~Haven%20couch~26. Unfortunately, it won't fit through my staircase as the width of the staircase is only 36" and it is quite narrow. 
Would you be able to help get it through?
Thanks,
Zaid