Basic information about biomass: raw materials and processes for biomass energy generation, energy content of various biomass resources, and uses for biomass energy. The term biomass refers to raw organic material used to generate a number of energy resources, including heat, liquid or gaseous fuels, and electricity. Chemical energy stored in biomass can be converted to heat through combustion (burning). Biomass can be converted to liquid or gaseous fuels or can be used to generate electricity in the same way that coal is used. The electricity generated can be sent to energy consumers via electric transmission systems.
Steps. 1  1. Nail top plates to all the outside walls. 2  2. Measure and cut ceiling joists from 2-by-4 lumber. 3  3. Cut a ridge board form 2-by-6 lumber.  4. Lay planks across the ceiling 1  joists. 5. Calculate the rise of the gable roof.  6. Measure and cut the rafter boards from 2-by-4 1  lumber. 7. Make a collar tie for each pair of rafters.
Itâs also possible (although much rarer) for roof overhangs to be too wide. A typical gable roof has two kinds of roof overhangs: eave overhangs and rake overhangs. Because itâs easier to frame a wide eave overhang than a wide rake overhang, problems from stingy overhangs are more common at rakes than eaves.