][ STEEL STRUCTURES ][

OTHER METALS

Aluminum
	low electrical resistance
	1200 F melting point
	0.0000128 thermal coefficient of expansion
	22,000 psi tensile strength
	Aluminum Alloys	
	ASCE Specification 6061
	ASCE = American Society of Civil Engineers

Copper
	electrical conductivity
	corrosion resistant
	copper + zinc = bronze
	0.00001 thermal coefficient
	36,000 - 70,000 psi tensile strength

Stainless Steel
	min 12 % chromium
	30,000 -   50,000 psi yield strength
	75,000 - 115,000 psi tensile strength
	28,000 psi modulus of elasticity

Carbon Steel
	36,000 - 65,000 psi tensile strength

Zinc
	corrosion resistive
	brittle
	above 250 F malleable & ductile
	Coatings
	Hot- Dip Galvanizing
	Electrogalvanizing

Tin
	corrosion resistive
	tinfoil

Terne Metal
	85% lead
	15% tin
	used as coating
	ASTM A308
	cheaper than tin

Brasses
	alloys of copper and zinc
	60% - 40% copper - zinc
	90% - 10% copper - zinc
	adding tin increase corrosion resistance

Bronzes
	95% - 5%   copper - tin
	75% - 25% copper - tin
	tin increases hardness

Monel Metal
	2/3 nickel + 1/3 copper + iron + manganese
	corrosion resistive


FLASHING:
=========
Def.: Flashing
	thin,	impervious materials
	used to prevent water 
	from entering the joints of a building.

cap flashing
	min. 2" extend up
metal counter flashing
	min. lap 4"
base flashing
	min. 8" to 12" above anticipated waterline
chimney flashing
	min. 4" apron, wall, sidelap
skylight
	min. 4"
vent pipe
	min. 6" flashing
	min. 12" pipe 
window head flashing
	min. 2" up
window sill flashing