![Axial Capacity of 1 1/2" Type "B" Roof Deck Based on ICBO ER-2078P 1 Axial Capacity of 1 1 2 Type B Roof Deck Based on ICBO ER 2078P](https://excel.civilmdc.com/wp-content/uploads/2021/12/Axial-Capacity-of-1-1-2-Type-B-Roof-Deck-Based-on-ICBO-ER-2078P.png)
The roof deck is the roofing material between the structural components (the trusses and joists) and the insulation and weatherproofing layers (roof materials, coatings, layers, etc.). … For residential buildings, the most common type of roof deck is plywood or tongue and groove wood systems.