The lower surface of a horizontal timber.
see Face
b*) Ridge purlin d*) Soffit (face) e) Upper side f*) Top (face) g) Lower side h) Inner side i) Outer side j) Upper face of truss
The lower surface of a horizontal timber.
see Face
b*) Ridge purlin d*) Soffit (face) e) Upper side f*) Top (face) g) Lower side h) Inner side i) Outer side j) Upper face of truss
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