The H-Factor

Index to H-Factor Topics

An easy to view list of all H-Factor topics can be found on our index page at H-Factor Index

Installing Hydratec Software Silently

Many IT professionals like to 'push' installs onto user machines, and they don't want to sit on each user's machine and click the Next and OK buttons repeatedly.

There is a way to record the steps used to install our software, and replay those steps on each user's station.

The Silent Install options for InstallShield installer

Switch	Notes
/s	Silent mode. For an InstallScript project, the command Setup.exe /s runs the installation in silent mode, by default based on the responses contained in a response file called Setup.iss in the same directory
/r	Record mode. In order to run an InstallScript project installation program in silent mode, you must first run Setup.exe with the /r option to generate a response file, which stores information about the data entered and options selected by the user at run time. Running an InstallScript installation program with the command Setup.exe /r displays all the run-time dialogs, and stores the data in a file called Setup.iss, created inside the system’s Windows folder. response file name and location, use the /f1 option, described below.
/f1	Specify alternative response file name and path Using the /f1 option enables you to specify where the response file is (or where it should be created) and what its name is, as in Setup.exe /s /f1"C:\Temp\Setup.iss". Specify an absolute path; using a relative path gives unpredictable results. The /f1 option is available both when creating a response file (with the /r option) and when using a response file (with the /s option)
/f2	Specify alternative log file name and path When running an InstallScript installation in silent mode (using the /s option), the log file Setup.log is by default created in the same directory and with the same name (except for the extension) as the response file. The /f2 option enables you to specify an alternative log file location and file name, as in Setup.exe /s /f2"C:\Setup.log". Specify an absolute path; using a relative path gives unpredictable results.

Example: Start the installer silently

Setup.exe /s

From: http://www.silentinstall.org/InstallShield

Toolbar/Ribbon Button Sizes and Colors

AutoCAD 2015 introduced a Dark Color theme to add to what is now called a Light theme. In all, there are four (or six!) basic configurations. Dark and Light, regular and large buttons. These are accessed via the OPTIONS command and found on the Display tab of that command.

The default is the dark theme with regular buttons, which many find hard to read. Many also find the large buttons to help considerably, or choose the Light theme with either large buttons or not. This is what the four can look like:

Light Theme / Large Buttons

Light Theme / Regular Buttons

Dark Theme / Large Buttons

Dark Theme / Regular Buttons

Furthermore, AutoCAD 2020 changed the Dark theme to be dark blue instead of the dark grey of earlier versions, in acknowledgement of the difficulty of seeing the button pictures clearly

Dark Theme 2020 / Large Buttons

Dark Theme 2020 / Regular Buttons

The regular buttons are still too small in my opinion, but the large dark looks better. A future update will make our button images transparent so they present better - right now they have a shadow around them of the dark grey color.

Also notice the Ribbon buttons do not get larger by selecting Large. Will they change that in the future? Who knows...

Adding or Removing Inch Marks on Pipe Diameters; or Changing Drawing Setup

From a Customer: "Where is the setting to get the inch prefix when I am using the change pipe diameters?  Every time I have used this command with 2019 it takes away the inch suffix when I select a pipe size to change."

Answer: The place to set it is there when you start a new drawing. You can also access it by picking HydraTools->Options->Access Drawing Unit Setup:

Note: This does not have anything to do specifically with 2019, but it can be easily changed, more or less permanently.

Put a “ in the Suffix field

The next time you go up to 3D and back to 2D, the suffixes will be updated to reflect your choice.

Note: The Prefix option is more or less only used by our Metric friends in Europe. They sometimes use it to put a nominal diameter symbol in front of the pipe diameter, i.e. ø25

Also: This command can also be used to change the drawing scale if you set it up wrong

Moving Multiple Riser Nipple Tags Together Using Grips

You might be in a situation where you want to move some riser nipple tags and want to keep them together, so that they line up nicely. There is a tool to do this with pipe tags and hanger tags, but not with riser nipple tags. Which is where Grips come in. Grips have dozens of uses, but most people only use them for one or two things. Here is how to use them to move multiple items together.

Example - Move three riser nipple tags together

Step 1: Select riser nipple tags. You can do this one at a time or by using any selection method:

Step 2: Hold the SHIFT key down and pick the grip associated with the text of each riser nipple. The grip will turn Red after selection. This i known as a 'hot' grip. Release the SHIFT key after you have selected the three grips:

Step 3: Pick any one of the hot (red) grips. You will notice that all three riser nipple tags move in unison with the one selected:

Step 4: Pick the new placement point. Note in the example that the tag is being moved to the other side of the main:

Step 5: Hit the ESC key to cancel the grips. You are done!

 

Creating Your Own Templates

A customer contacted me today about having trouble using our commands. The cause was that he was using a template that someone else in his company had made, and it wasn't compatible with our program.

You can easily make your templates to work with our program. Here are the simple steps:

1. Type in Open and Drawing Template (*.dwt) from Files of Type at the bottom of the window. Pick the template of ours that you want to use for a base (this is usually the HydraCAD Imperial Default)

2. When it opens you will be asked to pick a Drawing Scale. If you want to lock in a scale for your template, then pick it here. If you want to be asked every time you start a new drawing using this template, then pick Cancel

3a. After dealing with the above dialog box, immediately type in SaveAs. Type in the name you want to save the template as. We do this right away so you don't accidentally overwrite ours

3b. Type in a new Description for your template. Note the suggested description, below

4. Open up your company template (.dwt) or drawing (.dwg) and select all the objects in it. Copy and paste these into the template you just made

5. Save your new template

 

Note: This should be done after every major release of HydraCAD (i.e. V55, V56, etc)

Autopeaking a Grid

Tutorial #5 in the HydraCALC manual explains how to use HydraCALC-Sizer to automatically build a grid based on some simple inputs. The grid it builds is ready to be AutoPeaked. Aside from that, how does AutoPeaking work in HydraCALC? And what is AutoPeaking?

NFPA-13 Section 22.4.4.4 addresses gridded systems. It states that the designer must verify that the hydraulically most demanding area is being used. Further, it states that at least two immediately adjacent areas on either side along the same branch lines be calculated to prove that the one of them is that hydraulically most demanding area. Third, it states that a computer program that shows the peaking is acceptable based on a single set of calculations. This is where the term 'AutoPeaking' comes from.

In the days before AutoPeaking, (and still, sometimes), we would pick a remote area on a plan. We would then calculate it. We would then shift the remote area one head 'left' along the branch line and calculate that area see if the safety margin shrinks. If it did, we would keep going left until the safety margin stopped shrinking, or we ran into a main. If the safety margin stopped shrinking, then we knew which area was the remote area. If it never shrunk while moving left, we would shift the remote area one head to the right and check that one, and so on. The picture below illustrates this point. Please note that the terminology Left and Right mostly applies because it is an easy way to explain this concept, but Left and Right are are arbitrary and can be interchanged as long as the use is consistent along all the branch lines.

If the grid is non-typical, we still calculate additional areas manually in HydraCALC to this day.

With HydraCALC, AutoPeaking must only be used on 'typical' grids. That means the gridded branch lines:

1. The spacing between each head in the remote area must be the same
2. Must not have any elbows or tees between the heads in the remote area
3. Must not be on arm-overs
4. Must be labelled with Left and Right markers (L and R)

If these conditions are not satisfied, you will need to perform separate calculations for each remote area and print and submit them to the AHJ. You cannot use the AutoPeaking report in HydraCALC under these conditions.

Why? Concerning Condition #1: Because in a non-typical situation (heads spaced differently along branch line, for example), the number of heads that must be calculated along a single branch line may change as the remote area shifts one head at a time. Remember, the NFPA rule is that the length of the branch line to be calculated be at least 1.2 times the square root of the remote area. This calculates out to 46.5 +/- ft with a remote area size of 1500 sq. ft. In the example below, the heads are spaced 12 ft. apart, requiring the calculation of four heads per line. If the spacing were, say, 12' / 12' / 12' / 12' / 10' / 10' / 10', four heads would not be sufficient when the area was shifted 12' towards one head or the other. Thus, the shape of the remote area would change and possibly the number of heads calculated in it.

Conditions 2 and 3 are listed because the AutoPeak feature in HydraCALC requires that none of the points in between flowing heads have any fitting on them. Condition #4 allows the program to recognize the remote area points to be shifted. This will be explained later.

Example:

Each area contains the same amount of heads; spacing is 12' between heads along the branch lines.

Scenario 1: Area 1a (red area) is the first area placed and calculated. Area 1b (purple, one head or 12' 'left' of Area 1a) is then calculated and found to be less remote than Area 1a. Area 1d (green, one head or 12' 'right' of Area 1a) is then calculated and found the be less remote than Area 1a, meaning Area 1a is 'most' remote.

Scenario 2: Area 1a (red area) is the first area placed and calculated. Area 1b (purple, one head or 12' 'left' of Area 1a) is then calculated and found to be more remote than Area 1a. Area 1c (blue, one head or 12' 'left' of Area 1b) is calculated and determined to be less remote than Area 1b, making Area 1b the most remote. Area 1d (green, one head or 12' 'right' of Area 1a) is never calculated as the remote area consistently marched to the left.

There are other scenarios, but these are the two used here for illustration.

Left and Right markers

Left and Right markers act as 'bookends' which border the area to be calculated in HydraCALC. These can be typed in manually when inputting a calculation yourself. The AutoCalc process from within Hydratec for AutoCAD or Hydratec for Revit will add the appropriate left and right markers on grids that satisfy the four conditions listed above. They will also be added automatically by the HydraCALC-Sizer program, if the job is a grid and if it is transferred to HydraCALC using the Build Hydraulic Input function.

As mentioned above,Left and Right applies because it is an easy way to explain this concept and Left and Right are are arbitrary and can be interchanged as long as the use is consistent along all the branch lines.

From Tutorial #5: The L and R markers are added before the length automatically. Note in this example that L6 and R78 are used as the bookend lengths.

The common length between heads is 12 (ft). Given this situation, HydraCALC will shift the area being calculated by 12 each time. Since there is no room to take 12 away from (L)6, the process will instead calculate the first area and then march 12 feet each time to the right. After the area shifts to the right one time, the L6 will become L18 and the R78 will become R66. This will not be noticed in the input unless you choose an option to do so when you calculate it. Speaking of which, here are the Options:

The AutoPeak Grid Calculation option tells HydraCALC that you want to peak the calculation. If this is checked, the second option is available, Auto change peak lengths (L&R values). This option is the one referred to above. It will alter the L# and R# values to reflect the location of the remote area. This will make the calculation faster the next time, ans it may not have to shift the area as much. If the L and R markers are not added to the calculation, these options will not be selectable.

When you print out the final (submittal) calculations, you will be able to select the AutoPeaking Sheet for printout.

 

The AutoPeaking Sheet:

The List of Pipes for Area Calculated section reports where the remote area ended up after it was shifted automatically in the calculation. This is so the user can mark the remote area properly on their plan.

In the report above, the distance between reference points 2 and 3 is listed at 38.170 (feet). In this example, 2 is the branch line connection at the cross main and 3 is the first flowing head in the remote area. The other side is 30.830 ft. The fourth line, right side, from 54 to 55 is 66.830 ft due to that line having less flowing heads operating.

The next section of this report shows the demands associated with the remote area. The most remote area is the one listed as AREA CALCULATED. This area is the one referenced in the List of Pipes for Area Calculated. The Flow Required and Safety Margin are reported for this location.

The LEFT listing reports on the demands of the area if shifted one head left, at the distance seen (12.000). The one head RIGHT listing is also reported. These directions are consistent with the note above. If the remote area calculation had to ‘move’ the remote area more than one head in a given direction, you will see multiple LEFT entries, each one one head further along the grid line, until the pressure starts to drop, and the peak is found.

The Typical Distance Between Heads is reported. The Split Point Used in Area Calculated refers to the reference point name designated to the most remote head.

 

Using a Tank as a Water Supply

HydraCALC is set up to use either a city supply or a pump. There is currently no provision to choose use a tank or cistern, but there is a way to do it.

From a Customer: I have a 42 foot tall water tank. How do I use this supply in HydraCALC

Answer: You must first ascertain the elevation level of the tank that you are able to use per NFPA. For argument sake, lets assume 42 feet is the level allowed. That would give Static of 18.19 psi. Make the Residual slightly smaller (as it will error is the same as Static)

Put it in your city supply like this:

The flow used is not really relevant, as the slope is so gradual. But, it should be big enough to supply a pump if needed.

 

 

Setting Your Workspace to be the one that Shows up When you Open HydraCAD

From a customer: I updated my HydraCAD to V56 and I set my workspace as current but every time I open HydraCAD it opens with HydraCAD Standard.  I have been in the customize area and set my personal cui as current but it doesn’t start up with that. How do I make it show up every time?

Answer: You need to set your workspace to be the default one, so it loads when you open cad. Type in CUI and enter. Then, note your workspace in the list that will appear. Right-click on it and pick Default. Next time you open cad, it will default to yours.

Changing Multiple Riser Nipple Lengths

From a customer: Is there a way to edit the length of multiple riser nipples at once?

 

Answer: If they are a Specified Length, then yes. Type in CL to launch the Change Length command. Check the Filter a Specific Block to do many RNs at one time

If they are Computer Generated, then just adjust the pipe elevation markers to the proper value. Once the building is elevated, the riser nipple lengths will recalculate.

 

Getting Darcy-Weisbach Values from a Foam Spec Sheet

In order to calculate certain foam systems, a Darcy-Weisbach calculation must be done, as opposed to a Hazen-William one. This was touched on in this older blog post: Darcy-Weisbach Who?

The following are numbers found in the technical data sheets of a particular brand of foam concentrate. Notes are added to illustrate which numbers go where.

 

How to do a Complete Cleanup of Autodesk Products after Uninstalling

If you have trouble with AutoCAD and uninstall it and reinstall it, you may still be getting the same errors and wondering why. This is because uninstalling AutoCAD does not remove all the 'crumbs' left behind. These crumbs can get in the way of a good AutoCAD reinstall.

There are a number of pages on Autodesk's Knowledge Base that deal with this, many of them redundant. Here is the best one I have found:

Remove Autodesk Software (Windows)

 

 

How to Have Fittings Show up in HydraCALC

Say you want to have European Standard fittings selectable in HydraCALC. You pick Utilities / Alter Pipe and Fittings to bring up the pipe tables and see they are already created, but you wonder why they don't show up.

The reason is there is no Short Name assigned to them. HydraCALC does not have every fitting immediately accessible from the input screen because that would bring up too many choices for you to sort through.

Assigning Short Names is easy. There are two rules:

1. The Short Name can be between one and four letters long
   
   
2. Don't use a Short Name that is already used
   
   
3. The first letter of the short Name must be upper case
   
   
4. The second through fourth letters must be lower case

I suggest using names that are indicative of the fitting name, for ease of recognition. These would be my choices for the EN fittings:

Once you pick OK on the fitting input screen, these values will be recorded and your fittings will now show up for the corresponding diameters when you right-click in the Fitting column.

 

Why More Hydraulic Demand in a Sloping System?

A customer sent a job over looking for an explanation:

"I have an inquiry about HydraCALC. I’m trying to calculate a system with sloping branch-lines as shown in below figure. I made two calculations in which everything is the same except for the elevation.

First, all heads have same elevation of 20 feet. And second, each are provided exact elevation as shown below. My questions are the following:

1. Why is the result not the same if the highest head or elevation to overcome is equal for the two situations?
2. Why is the system with sloping branch-line more demanding if the only difference in inputs are the elevations?"

The answer lies in the very question.

This is the system:

These are the results:

All elevations entered as 20':

All elevations entered as actual:

My answer (reader comments welcome):

Each system is getting enough pressure to supply water to 20’ of elevation for every head. In the case where all heads are labelled as 20’, this results in less flow and pressure as the system is more evenly ‘balanced’ from head to head.

In the system where the elevations vary, there is more ‘overage’ due to that fact that every head is getting 20’ of elevation pressure because the water has to be able to make it up to the highest head. This means even the 16’ and 17’ heads are getting 20’ worth of pressure. This is why NFPA 13 added the rule a while back requiring that the actual elevation at each head be entered – because it makes a negative impact on the calculation.

 

A side note: Back when this rule was implemented (Late 80s? Early 90s?), a good customer called me because he recalculated his sloping system using the new rules and it didn't work. My answer was - "That is why they added the rule!"

Using your own logo for the HydraCALC cover sheet

Many of our users aren't aware of the fact they can customize the cover sheet logo in HydraCALC.  These steps are pretty easy and can normally be done in about 5 minutes.

1. You'll need your logo, preferably as a .BMP and with a resolution of 500x500 pixels or greater, but any image type will do.

2. Open your image file using Microsoft Paint.  Check the pixel size of your canvas;  you're trying to get to as close to a square image as possible.  You can click the grips at the edges of your canvas to adjust it as necessary.

3. In the image above, the canvas is exactly 500 x 500 pixels.  Make sure to leave some white space near the top, this means your image will be closer to the bottom, not centered inside the canvas.

4. When ready, save the image as a .BMP file.  When you click 'Save as...', select the option 24-bit Bitmap (*.bmp)

Save the file to this folder [local drive]:\HES\HydraCALC\Ver50\Data\Setup\Reports and use the filename yourCompanyName

5. Using Windows File Explorer, browse to the location [local drive]:\HES\HydraCALC\Ver50\Data\Setup\Reports and locate a file called BLANK.DAT.  Make a copy of it then rename it to yourCompanyName.DAT

6. You can check your logo by going to HydraCALC, then go to File|Print Final.  When HydraVIEW opens, in the Cover Sheet drop down, you'll see your newly created logo in the list.

7. If you feel some adjustments are necessary, you can click on Tools|Page Setup then adjust the values in the Cover Sheet Graphics area in regards to the Tab, Width & Height.  The tab value pushes the image from the left to the right, and your width and height are a ratio of your image's width and height.

 

Good luck and get in touch if you need any clarification.

Using Separate Part Number Databases in HydraLIST for Different Suppliers

From a customer today:

Question: Is it possible to set up separate databases for HydraLIST so that I can have part numbers that match up to the Supplier part nos.? I Know HydraLIST has alternate part-no options but I think it might be easier if I just set up a different database?

We primarily use 4 suppliers-

Viking Supplynet
Ferguson Fire
Core & Main (A/K/A HD Supply)
Fox Sprinkler

Answer, from Paul McKenna here at Hydratec:

You can create separate databases for each supplier -

1. Open Explorer or My Computer and go to the Hes\Hydlist\Ver50\data folder

2. Copy the SetUp folder 4 times and paste them in to the original Hes\Hydlist\Ver50\data folder

3. Rename the copied folders

                SetUp-CoreAndMain

                SetUp-Ferguson

                SetUp-Fox

                SetUp-Viking

You should end up the five folders names that start with SetUp

Inside HydraLIST you can switch from one vendor to another.

5. Pick the Utilities Pull down menu and select Switch General Data Location:

Click on Data folder in the tree. Pick on the folder you want to use

For this example we will pick on SetUp-Viking and pick OK

If you pick the Reset Default button the path will be setback to the original path to the original SetUp folder

You will get a message that lets you know that you are switching the data location. Pick OK

If you hover over the General Data Icon a tool tip will tell you which database you are currently using:

From here you can decide what needs to be done to each database. Contact us before you spend a lot of this altering the data in the folder, as there are preferred methods of altering the data in each folder.

 

 

Backing up your workspace

    With HydraCAD v56 for AutoCAD 2019 and updates for HydraCAD v54 and v55 due to be released soon, this would be a good time to revisit backing up your workspace. A common reason some of our users decide to hold off on running a HydraCAD update is due to the fact they'll end up losing their toolbar positions in their AutoCAD work area. This is your 'workspace', and with this blog post we'll cover saving and recovering it. Near the bottom of this post you'll see steps on sharing workspaces between computers and pulling a workspace from an older AutoCAD into a new AutoCAD.

    AutoCAD's Customization Menu, the toolbar along the bottom right of your screen with a LOT of buttons, should have a gear icon, this is for your Workspace Settings. If you cannot see the gear icon, click the hamburger icon at the far right then turn on the Workspace Switching option. You can also turn on the Workspaces toolbar, found in the Acad group of toolbars.

SAVE YOUR WORKSPACE

    Before anything, we must save your configuration. Select 'Save Current As...' from the list (or type in WSSAVE at the command prompt) and type in a name for the workspace. If you've already saved one, select it from the list to overwrite it with a new one. Personally, I like to use the current date so I'll remember the last time I backed up my workspace, but whatever you decide is up to you.

  

You can confirm it was saved by selecting the list of workspaces as you'll now see it as an option .

RUN THE UPDATE

    At this point you'll run the HydraCAD update. At its conclusion, you'll notice your toolbars have realigned themselves to their default locations and your workspace is no longer in the list of saved workspaces.

RECOVER THE WORKSPACE

    See the image below for help with steps 2 through 5.

    1. From the workspace drop-down menu (shown in the image above), Select Customize.

    2. In the Customize User Interface window, select the Transfer tab (a), then the Open button (b) on the right side.

    3. Depending on your version of AutoCAD/HydraCAD, you will navigate to one of the following folders;

            Acad 2015-2016 HydraCADv53 -\HES\HydraCAD\Ver50\Programs\Version53\Backup

            Acad 2017 HydraCADv54 -\HES\HydraCAD\Ver50\Programs\Version54\Backup

            Acad 2018 HydraCADv55 -\HES\HydraCAD\Ver50\Programs\Version55\Backup

            Acad 2019 HydraCADv56 -\HES\HydraCAD\Ver50\Programs\Version56\Backup

    4. You'll find a sub-folder based on the date and time of when you ran your backup. Double-click it then double-click 'HCADWIN.CUIX'.

    5. On the right pane, you will see your previously saved workspace in the list.  Click and drag it from the right to the left pane where it says 'Workspaces'.

    6. Click OK in the Customize User Interface window to return to the drawing and a command prompt.  You'll now see your saved workspace has returned to the list.

SHARING WORKSPACES

    You can use this method to copy a workspace from one computer to another; the file you'll be looking for is HCADWIN.CUIX, use the one found under \HES\HydraCAD\Ver50\Programs\Version5_\ and your least intrusive method is to copy it to the desktop of the new computer and browse to that location when going through the transfer process. Delete the file from your desktop when complete.  

INSTALLING A NEW VERSION OF AUTOCAD

    This method should work fine between versions of AutoCAD as well (as long as the AutoCADs don't have too many years between them). When installing a new AutoCAD, always remember to NOT migrate your settings over. When the Acad and Hcad installs are complete, you'll use the steps above to transfer your older version Acad workspace over to your newer version Acad workspaces.

 

Listing a Plug at the top of a Tee in HydraCAD

From a customer: Can I AutoList a plug at top of this tee?

From my co-worker Bill - yes you can:

This will list the correct tee at the end of the riser nipple and will list the plug with the miscellaneous material.

1. Insert a sprinkler head block defined as “directly connected” at the riser nipple

2. We often use Head5 for this purpose because of how it looks

3a. Define the PLUG/sprinkler as “point down” and “at bottom” if the plug is at the bottom of the riser nipple. Note: use at Bottom - if the 1’-6” long pipe is lower than the 2’-3 ½” pipe in our example

3b. Select Choose 3D Head Block and select Plug1 as the 3D representation

4. Scale the plug/sprinkler block down a bit so you can tell it is there, but not so large as a sprinkler block

 

Using Velocity Pressures in Hydraulic Calculations

My co-worker Paul produced this blurb, on request from a customer who was attempting a Velocity Pressure calculation (a velocity pressure calculation is required by NFPA when designing Fixed Spray deluge systems). This type of calculation requires the use of the Input Types field, discussed in this post a ways back: Why Use Input Types?

For this kind of calc, The program needs to know which pipes are perpendicular at pipe intersections. The perpendicular pipe is where the velocity pressure is used to determine the flow into the pipe.

You can use any of the default Input Types from in the selection box, in this example we have used the Letters A B & C as the Input Types for clarity

All of the pipe where the flow goes straight through must have the same Input Type. Outlet pipes where the flow is determined by the velocity pressure must have a different Input Type.

In addition to the perpendicular pipe outlets the velocity pressure is also used to determine the flow at a K-Factor where a sprinkler head is directly connected to a pipe. (The sprinkler is the perpendicular outlet).

We used A for the Input Type from the remote sprinkler back to the supply point.  We used Input Type B for the pipe that comes off perpendicular to the Input Type A pipes and Input type C for the pipe that comes off perpendicular to the Input Type B pipes.

Based on this, the program knows where all the perpendicular pipe locations are and can calculate the velocity pressures correctly. 

Below is a flow diagram showing all of the B Input Type Pipe Marked in Yellow and all of the C input Type Pipe Marked in Pink. The pipe not highlighted is Input Type A pipe.

The Velocity calculation is performed at the intersection of the different Input Types and the K-factor location.

This link will get you the example job used for this post. We suggest you place it in your \HES\HydraCALC\Ver50\Data\Jobs\Example Jobs folder. Velocity Pressure.WXF

Illustration for labeling Input Types

 

Rolling Back or Uninstalling Windows Updates

From time to time a Windows update will cause havoc with AutoCAD or another program you may be using. There is a way to 'roll back' updates, as described in this How-to-Geek web publication:

How to roll back or uninstall a problematic windows update

 

Aligning Heads When Using a Head Guide

From a customer a little while back:

Q: I would like the head guide to have an option to spot the head based on the last one (with Ortho on so they line up). Kind of like the insert multiple sprinklers  Or add the option to the “insert multiple” where you can access the head guide. I am using the custom guide to layout heads in an attic and am having a hard time getting them to line up.

A: This one took me a little bit to figure out. Changing the program for Head Guide is problematic, since we are taking advantage of a specific feature available inside AutoCAD - one that I won't bore you with, but is not used very often by drafters, if ever. Because if the way it works, we can't just make it do other things while running it. There is, however, another way to achieve what this custom wants as a result. And that means activating a command before running Head Guide. That command is SNAP (not, OSNAP). Setting the SNAP point will make the cross-hairs move in an Ortho-like motion. We already have a command to automate this - Align Crosshairs with Ceiling.

This is the room. We can use a head guide to run a line of heads up the middle:

Pick Align Crosshairs with Ceiling on the Sprinkler Toolbar.

Picking this will ask you to select a base point. Select a corner of the room, or even the midpoint of the lower leg

The cross-hairs will now jump in 1 foot increments as you move them. This will work, but it may be a little too 'jiggly' for some. To change the SNAP increment, type in SNAP at the command prompt and type in the desired increment. 2' would probably be best for most situations. But, if you have specific spacing requirements, you could set it to that. A reminder - SNAP can be toggled on and off with the F9 key.

Pick on of the four Head Guide commands. i am using the first one, the Standard guide.

 

Now, hover the Head Guide over the insertion point of the first head. Then, left click and insert the head.

Next, move the cross-hairs up to the next insert point and left click again, until you have your heads spotted.

Remember, hit F9 to turn off SNAP or pick Align Crosshairs with Ceiling again. That will turn off SNAP before prompting you to pick another insertion point to align.