Fire Resistance

Exposed-timber char method fire rating (NDS Ch. 16).

Design diagram — updates live with your inputs

Member & Material

Material type

Species Sawn lumber only

Grade Sawn lumber only

Width b (in) Larger exposed timbers

Depth d (in)

Fire exposure 3-sided = top protected by deck/topping

Required rating (hr) 0.5 / 1 / 1.5 / 2

Nominal char rate (in/hr) beta_n; 1.5 typical sawn/glulam

Applied moment (ASD) (lb-ft) Service moment during the fire event

NDS 2018