perpendicular slope

perpendicular slope

[¦pər·pən¦dik·yə·lər ′slōp]
(geology)
A very steep slope or precipitous face, as on a mountain.
References in periodicals archive ?
The work at the wood framed attached canopy structure includes scraping and painting of metal connectors and wood structural elements, asphaltic roofing and copper flashings removals; reuse of existing copper roof edge caps; replacement of rotted 5/4" x 6" V-edge, T&G, exposed roof sheathing boards, replacement of rotted perpendicular slope double framed low end roof "crickets"; installation of new leaders and built-in metal drains and connectors; an allowance for replacement of existing HID type canopy lighting with vintage style LED fixtures; new flashings and single ply, dark color, EPDM membrane roofing installations; temporary removal and reinstallations (with NJ Transit permission) of existing signage mounted on canopy structure as well as protection of same.
Actors climb perpendicular slopes at stomach-churning angles and hurl themselves into space with a bravura that causes the entire audience to gasp in unison.