Building Department - Deck Application and Packet - Chesterfield ...13'-5". handrailS: handrails required on one side of the stairs with 4 or more risers. handrails are to be not less than 34" nor more than 38" measured vertical from the nosing of the treads. The width of handrails shall be a minimum of 1 V. .... be installed in accordance with ti1e flashing provisions in ti1e LEDGER ATTACHMENT REQUIREMENTS. Figure 23: Attachment of Free-Standing:Deck to House for Deck Stability. tHing s:-=3/8" exterior .she-a tnln. thicknes existing wall stud ...