vi·ga 
(vēgə)
(vēgə)n.
Southwestern US
Southwestern US
A rafter or roofbeam, especially a trimmed and peeled tree trunk whose end projects from an outside adobe wall.
[American Spanish, from Spanish, perhaps from Latin bīga, team of horses, cart (from the long pole between the two horses); see yeug- in the Appendix of Indo-European roots.]
viga