Crafting Simple Traps

Homebrew and House Rules

In thinking of ways to exploit the weaknesses of giants, it occurred to me that setting some simple traps might be a good way to take advantage of their low Reflex saves. In looking for how the construction of traps works, I found THIS PAGE.

Can someone please confirm that my math is correct because it does not seem to pass a basic sanity test.

Let's say I'm not a trap master or anything, just a level-1 guy with a shovel looking to even the odds a bit, right? I'm looking to make a camoflauged pit trap because that seems doable. According to the info on that page, this is a CR 3 trap. Constructing a trap costs 1000 gp x the CR so right off the bat that just seems insane. That puts the cost at 3000 gp to dig a hole in the ground and cover it with a tarp and some leaves. They do however specifically note that for a very simple trap such as a pit trap the cost might drop as low as 250 gp x CR. Oh, what a relief! My hole in the ground only costs 750 gp. I guess that covers the cost of the shovel and the 749 gold coins that I used to line the walls of the pit.

But here's the part I really don't get... the time. So if we assume that I'm just your average guy, let's say I took a rank of Craft (trap) so with my 10 Int I have a total bonus of +4 (1 rank plus 3 for Craft being a class skill). The hole in the ground has a DC of 20 so I can't take a 10 and succeed at... digging a hole in the ground. But let's just say I roll it and succeed if just barely. So I got a 20 and I multiply that by the DC of 20 for a total of 400. That gives me 400 silver pieces progress toward my goal of 7500 silver pieces.. after A WEEK of digging a hole in the ground. Since I need to roll a 16 or better to hit that 20 DC, I'm only going to succeed 25% of the time so on average I can expect to make 400 silver pieces progress every 4 weeks or 100 silver pieces per week.

That means I'm looking at 75 weeks of work. That's a year and a half. To dig a hole and cover it with a tarp and some leaves.

Is my math right?

Now, I get that the crafting system is designed to discourage PCs from spending their lives crafting instead of adventuring but this is me trying to dig a hole to trap some giants. I'm trying to adventure, to be clever, to utilize planning and reconnaisance to lure the enemy into a trap... that turned out to be a construction project on par with Boston's "big dig."

I really hope that I have totally misunderstood some essential element here that will snap this whole picture into focus so it will suddenly make sense.

The Exchange

Yeah, crafting of any sort is basically broken. It takes four years to make a single suit of masterwork full plate. The best thing to do is just talk to your GM about the cost of materials, the DC to craft it and a reasonable mount of time it would take, decided by the GM.

For digging a pit, a shovel can move soil at a rate of 2 cubic feet per minute. A basic pitfall is a 10x10x20 hole, so it would take about 10 minutes to dig.

Then throw some Camouflage netting over it and you've got a trap. doesn't even need ranks in craft (trap), although the netting requires a survival check.

If you have a spellcaster, there's also the "create pit" spell, "expeditious excavation", "spiked pit" and "hungry pit"; in the advanced player's guide.

Lastly, there are ranger traps. er-archetypes/trapper/ranger-traps

Hope this helps.

RPG Superstar 2015 Top 32

I created a trapmaster rogue class feature to allow players the use of traps - maybe that can help.

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