The phrase "at roof" is not correct and usable in written English.
It seems to be an incomplete expression and lacks clarity in meaning.
Example: "The workers were seen at roof level, performing maintenance."
Alternatives: "on the roof" or "at the rooftop".
Weak chimneys broken at roof line.
On a sunny day, sit outside at roof level.
Every juror looked directly at Roof as he spoke to them for about five minutes.
Video from local news helicopters showed homes in West Alton with water almost at roof levels.
The peak global drift at roof level was 166 mm, and the peak inter-story drifts were approximately 1.3%.
A bespoke approach to the entrainment of puffs at roof level has also been included in the model.
Each of other 3 new buildings presents the 5S plus the additional storey (a new-at-roof construction (NRC)) on top of it.
Enclosable volumes that exist among the scaffolding elevate the visitor, shelter exhibition spaces, and bridge the program through the consumption of food and the visual connection to the cultivation occurring at roof-level.
Thirty load cells measuring structural reactions at roof-to-wall and wall-to-foundation connections were used to determine influence functions in response to surface pressures generated by extreme winds.
The distribution of the exit velocity, i.e. vertical velocity at roof-level, across the street showed that the flow within the street is greatly affected by the pitched roofs.
Structural influence functions were determined on a 1/3-scale light-frame wood structure, which was then subjected to a wind flow, while the surface pressures and structural reactions at roof-to-wall and wall-to-foundation connections were simultaneously recorded.
