3-4% is comfortable for parking stalls, anything more and doors get hard to open. <2% in ADA parking areas and crosswalks are <2% cross slope and <5% longitudinal slope.
if there is no existing lowpoint or discharge point you'll likely need to bring in fill and pad your site, then create a linear basin for runoff attenuation and allow it to level spread to the property line(s)
Hello, Site Civil Here. there is always a rub when groundwater is a challenge on a site when localized/perched under a building footprint. Our scope ends 5' outside of the foundation and apparently our insurance will not support us going out of our expertise. Without fail, if gw is found, the...
One surveyor finds control and brings it to a site, sets benchmarks for that site. civil site plans are designed and construction of a building starts.
a second surveyor finds control from a different source and brings it to a site, sets bench marks. civil road plans are designed immediately...
agreed, grading plan. i will say the slopes of the existing berm are really steep. we usually max out at 3' horizontal to 1' vertical. these slopes are like 3' horizontal to 5' vertical. probably needs to be clay soil or reinforced. thanks
I have been challenged to determine how a vehicle overhang affects ADA compliance in front of a parking stall. ADA standards 502.7 mentions "relationships to accessible routes" and says to use wheel stops as an effective way to prevent vehicle overhangs from reducing the clear width of...
what is your take on how to scope drainage within a closed courtyard? This is always a scoping challenge with the developer on who handles this. from a civil standpoint the risk involved is that you design the drainage space including the surface area and roof drainage that may collect there...
you can also use slope arrows with ranges. IE green for less than 2% (for ada checks in parking), yellow for 2-5%,etc. that will help you see if there are issues with fine grading quickly
Found a guide through a colleague, thought i'd share. PROWAG - public right of way access guide
R302.5.1 Within Street or Highway Right-of-Way
Except as provided in R302.5.3, where pedestrian access routes are contained within a street or highway right-of-way, the grade of pedestrian access...
We are now using the internal HGL modeling within civil 3d 2020. The infrastructure engineer that is responsible for designing the roads surrounding our infill project is using Bentley Stormwater Modeling and Analysis Solution.
Our 25 yr HGL using civil 3d is way above the road surface but...
Looking at a 6 acre 50-60 unit multi fam site that once had city right of way frontage. Years back the construction of an interstate bisected that road the parcel fronts so it became a 575' 2 lane road to a dead end and was essentially retained as right of way but closed to public use. we are...
Had two pre development staff review calls last week. It can be like a night and day difference between the jurisdictions.
ie town of ### north Carolina has a lengthy, land development code. They're making us donate 75' of right of way on frontage with main road, donate 25' of right of way...
City of Columbia Code requires a standalone interceptor for pool backwash before it hits the Sanitary Sewer. This is a first for me. Anyone else know of an AHJ requiring this? thanks
