The previous building code limited mass timberstructures to 85 feet tall and six stories of construction when using Type IVHT. The 2021 IBC added four new construction types, allowing mass timber to beused up to 18 stories for a total building height of up to 270 feet.
The Utah Code Amendment to the IEBC requires theseismic bracing of unreinforced masonry parapets or appendages, such ascornices, spires, towers, etc, when the roofing is removed and replaced on morethan 25% of the roof area.
The 2021 IBC no longer allows the use of fire-retardant-treated wood sheathing for 2-hour non-bearing partitions for shaft walls in Group I-2 or Group B Ambulatory Care Facilities.
The 2021 IBC now requires any attachment to fire-rated steel members to be rated at least 12 inches away from the structural member.
The IBC 2021 requires frost protection at exterior landings for all required exits with outward-swinging doors to ensure the exit door will be unobstructed.
The 2021 IBC adds the following criteria for a Risk Category 3 structure:
